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Danny Brothers

I currently lead a project called "U.S. West Coast and Alaska Marine Geohazards" and I spend about 6-10 weeks per year at sea collecting marine geophysical data.

I received my Ph.D. from the Scripps Institution of Oceanography, then moved to Woods Hole, MA, for a Mendenhall Postdoctoral Fellowship. In 2013, I moved to Santa Cruz, CA, where I currently work as a Research Geophysicist at the USGS Pacific Coastal and Marine Science Center. I grew up in Colorado and spent four years at CU Boulder for undergraduate studies in geophysics.

My research is focused on the following topics:

  • Development and application of geophysical approaches to offshore earthquake, landslide and tsunami hazard assessments

  • Marine paleoseismology

  • Understanding the interplay between tectonic, sedimentary, climatic processes along continental margins

  • Combining basic and applied research to study the geomorphic development of continental margins, including substrate fluid flow

News and Outreach

For more recent USGS News stories, click my News tab

February 1, 2016, Anchorage Daily News, "New technology lets scientists pinpoint underwater landslide that triggered deadly 1964 tsunami"

February 2, 2016, FOX NEWS, "USGS discovers source of Alaska tsunami that decimated village in 1964"

January, 2016, USGS Soundwaves, "Investigating the Offshore Queen Charlotte-Fairweather Fault System in Southeastern Alaska, and its Potential to Produce Earthquakes, Tsunamis, and Submarine Landslides"

January, 2016, USGS Soundwaves, "Artificial-Gas-Seep Test Produces 3D Images of Bubble Plumes in the Ocean"

August 24, 2014 NY Times, "Methane is discovered seeping from seafloor off East Coast, scientists say"

October, 2011, USGS Soundwaves, "High-Resolution Multibeam Mapping of Mid-Atlantic Canyons to Assess Tsunami Hazards"

July 6, 2011 LA Times, “Scientists tie Colorado River flooding to San Andreas Quakes”

July 3, 2011 San Francisco Chronicle, “Big quake near Salton Sea may be long overdue”

June 29, 2011 Discovery News, “Smaller Salton Sea silences seismic shocks” 

June 29, 2011 USA Today, “Salton Sea floods flipped San Andreas earthquake trigger” 

January 9, 2010 Nature News, “Floods linked to San Andreas quakes”

July 28, 2009 LA Times feature “More earthquake faults discovered at the Salton Sea”

May 15, 2009 CBS 5, “Lake Tahoe may be due for huge quake, tsunami” 

Science and Products

A map illustration of the seafloor off of a coastal area, that shows the features like submarine canyons and depth.

Cascadia Subduction Zone Marine Geohazards

Societal Issue: Uncertainty related to rupture extent, slip distribution, and recurrence of past subduction megathrust earthquakes in the Pacific Northwest (northern CA, OR, WA, and southern BC) leads to ambiguity in earthquake and tsunami hazard assessments and hinders our ability to prepare for future events.
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Santa Cruz Core Scanning Laboratory, Santa Cruz Core Laboratories, Santa Cruz Core Splitting Laboratory, Deep Sea Exploration, Mapping and Characterization, Subduction Zone Science
Cascadia Subduction Zone Marine Geohazards

Cascadia Subduction Zone Marine Geohazards

Societal Issue: Uncertainty related to rupture extent, slip distribution, and recurrence of past subduction megathrust earthquakes in the Pacific Northwest (northern CA, OR, WA, and southern BC) leads to ambiguity in earthquake and tsunami hazard assessments and hinders our ability to prepare for future events.
Learn More
Cartoon shows a cylindrical object that is floating above and scanning a landscape with rocky outcroppings.

Seafloor Faults off Southern California

More than 22 million people live along Southern California’s coast, and many more migrate there every year. Faults and earthquake threats in this region have been heavily studied on land. USGS aims to boost our knowledge about faults on the seafloor, so they can be included in hazard assessments.
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
Seafloor Faults off Southern California

Seafloor Faults off Southern California

More than 22 million people live along Southern California’s coast, and many more migrate there every year. Faults and earthquake threats in this region have been heavily studied on land. USGS aims to boost our knowledge about faults on the seafloor, so they can be included in hazard assessments.
Learn More
A bottomfish with small, bright spots lazily swims over a rocky seafloor among a few small pieces of kelp.

Ecosystems: EXPRESS

The continental shelf and slope offshore California, Oregon, and Washington are home to deep-sea corals, chemosynthetic communities, and other sensitive habitats that could be impacted by the development of energy and mineral resources. The EXPRESS (Expanding Pacific Research and Exploration of Submerged Systems) campaign will map and characterize these special areas to help guide ocean management...
By
Ecosystems Mission Area, Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
Ecosystems: EXPRESS

Ecosystems: EXPRESS

The continental shelf and slope offshore California, Oregon, and Washington are home to deep-sea corals, chemosynthetic communities, and other sensitive habitats that could be impacted by the development of energy and mineral resources. The EXPRESS (Expanding Pacific Research and Exploration of Submerged Systems) campaign will map and characterize these special areas to help guide ocean management...
Learn More
Map of offshore southern California showing the contours of the seafloor, with labels pointing to circles showing landslides.

Hazards: EXPRESS

Marine geohazards including earthquakes, landslides, and tsunamis lie offshore of densely populated areas of California, Oregon, and Washington. One goal of EXPRESS is to improve assessments of these hazards.
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Santa Cruz Core Scanning Laboratory, Santa Cruz Core Laboratories, Santa Cruz Core Splitting Laboratory, Deep Sea Exploration, Mapping and Characterization
Hazards: EXPRESS

Hazards: EXPRESS

Marine geohazards including earthquakes, landslides, and tsunamis lie offshore of densely populated areas of California, Oregon, and Washington. One goal of EXPRESS is to improve assessments of these hazards.
Learn More
A computed-generated image showing the Queen Charlotte Fault and nearshore area, using bathymetry and lidar data

Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. These underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis. The tectonically active west coast of the Americas is prone to such hazards, as it lies along the boundaries of major tectonic plates that make up the Earth's crust—the North American, Caribbean...
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Santa Cruz Core Scanning Laboratory, Santa Cruz Core Laboratories, Big Sur Landslides, Deep Sea Exploration, Mapping and Characterization, Subduction Zone Science
Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. These underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis. The tectonically active west coast of the Americas is prone to such hazards, as it lies along the boundaries of major tectonic plates that make up the Earth's crust—the North American, Caribbean...
Learn More
Image shows methane bubbling up from the seafloor

EXPRESS: Expanding Pacific Research and Exploration of Submerged Systems

EXPRESS is a multi-year, multi-institution cooperative research campaign in deep sea areas of California, Oregon, and Washington, including the continental shelf and slope. EXPRESS data and information are intended to guide wise use of living marine resources and habitats, inform ocean energy and mineral resource decisions, and improve offshore hazard assessments.
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Santa Cruz Core Scanning Laboratory, Santa Cruz Core Laboratories, Santa Cruz Core Splitting Laboratory, Organic Geochemistry Laboratory, Deep Sea Exploration, Mapping and Characterization
EXPRESS: Expanding Pacific Research and Exploration of Submerged Systems

EXPRESS: Expanding Pacific Research and Exploration of Submerged Systems

EXPRESS is a multi-year, multi-institution cooperative research campaign in deep sea areas of California, Oregon, and Washington, including the continental shelf and slope. EXPRESS data and information are intended to guide wise use of living marine resources and habitats, inform ocean energy and mineral resource decisions, and improve offshore hazard assessments.
Learn More
Block Island Wind Farm

Resources: EXPRESS

Along the U.S. west coast, the Pacific Ocean, ocean floor, and winds above contain potentially vast energy and mineral resources. Developing these resources safely and wisely requires detailed information for each area of interest. One goal of EXPRESS is to inform ocean energy and mineral resource decisions.
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
Resources: EXPRESS

Resources: EXPRESS

Along the U.S. west coast, the Pacific Ocean, ocean floor, and winds above contain potentially vast energy and mineral resources. Developing these resources safely and wisely requires detailed information for each area of interest. One goal of EXPRESS is to inform ocean energy and mineral resource decisions.
Learn More
Map illustration showing fault lines and direction of tectonic plate movement along a stretch of the Alaskan coastline.

Earthquake Hazards in Southeastern Alaska

Over the last 100 years, the Queen Charlotte-Fairweather fault system has produced large-magnitude earthquakes affecting both Canada and the U.S. To fill in missing details about its offshore location and structure, USGS uses sophisticated techniques to truly understand the fault’s hazard potential.
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
Earthquake Hazards in Southeastern Alaska

Earthquake Hazards in Southeastern Alaska

Over the last 100 years, the Queen Charlotte-Fairweather fault system has produced large-magnitude earthquakes affecting both Canada and the U.S. To fill in missing details about its offshore location and structure, USGS uses sophisticated techniques to truly understand the fault’s hazard potential.
Learn More
An illustrated map shows seafloor features and is labeled with dots to show where samples were collected.

2019 Lake Ozette

Collected bathymetric data, seismic data, and sediment cores from Lake Ozette in 2019, a USGS-US National Park Service partnership
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
2019 Lake Ozette

2019 Lake Ozette

Collected bathymetric data, seismic data, and sediment cores from Lake Ozette in 2019, a USGS-US National Park Service partnership
Learn More
Filter Total Items: 43

Multibeam bathymetry data and gridded surfaces for Lake Chelan, Washington, collected during USGS field activity 2023-631-FA Multibeam bathymetry data and gridded surfaces for Lake Chelan, Washington, collected during USGS field activity 2023-631-FA

3-m bathymetry and acoustic-backscatter data were collected during a June 2023 multibeam survey of Lake Chelan, Washington. Data were collected and processed by the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) with fieldwork activity number 2023-631-FA. The 3-m data are provided as GeoTIFF images.
By
Pacific Coastal and Marine Science Center

Sediment core data from the Great Salt Lake, Utah Sediment core data from the Great Salt Lake, Utah

This data release includes measurements of properties from short (
By
Geologic Hazards Science Center

Sublacustrine landslide and tsunami models from Lake Quinault, Washington Sublacustrine landslide and tsunami models from Lake Quinault, Washington

This USGS data release provides model setup files to simulate a hypothetical sublacustrine landslide in Lake Quinault and resulting tsunami waves.
By
Pacific Coastal and Marine Science Center

Bathymetry and acoustic-backscatter data for Lake Sammamish, Washington collected during USGS field activity 2021-656-FA Bathymetry and acoustic-backscatter data for Lake Sammamish, Washington collected during USGS field activity 2021-656-FA

The Pacific Northwest is home to numerous faults that cut through the surrounding crust including the Seattle fault. Over time, frictional stresses accumulate along these faults, building slowly until they exceed the fault's strength, resulting in an earthquake. Evidence of these earthquakes may be found in Pacific Northwest lakes. Past underwater landslides caused by the earthquakes...
By
Pacific Coastal and Marine Science Center

Chirp sub-bottom data collected in the Great Salt Lake, Utah during USGS field activity 2021-615-FA Chirp sub-bottom data collected in the Great Salt Lake, Utah during USGS field activity 2021-615-FA

This data release contains 57 high-resolution chirp sub-bottom profiles collected in the southern Great Salt Lake, Utah, by the U.S. Geological Survey in June 2021 during field activity 2021-615-FA. The dataset was acquired to image subsurface sedimentary structures and stratigraphy in support of efforts to characterize past earthquake events along the Great Salt Lake Fault, contributing...
By
Pacific Coastal and Marine Science Center

Multibeam line files from Cross Sound, Alaska collected during USGS field activity 2015-629-FA Multibeam line files from Cross Sound, Alaska collected during USGS field activity 2015-629-FA

In 2015 the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) in cooperation with the Alaska Department of Fish and Game (ADFG) collected bathymetry and acoustic backscatter data offshore Cross Sound in southeast Alaska using an Reson 7111 multibeam echosounder mounded to the ADFG R/V Solstice. The survey was conducted to map the offshore expression of the...
By
Pacific Coastal and Marine Science Center

Seismic sub-bottom, sediment core and radiocarbon data collected in Ozette Lake, Washington from 2019-2021 Seismic sub-bottom, sediment core and radiocarbon data collected in Ozette Lake, Washington from 2019-2021

Seismic-reflection data and cores were collected in Ozette Lake, Washington, from 2019 to 2021. These data were used to investigate submarine landslide deposits triggered by large Cascadia Subduction Zone earthquakes. Identification of fault-related submarine hazards is a primary mission of the USGS Coastal and Marine Geology Program. In the US Pacific Northwest region, the greatest...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Bathymetry and acoustic-backscatter data for Ozette Lake, Washington collected during USGS field activity 2019-622-FA Bathymetry and acoustic-backscatter data for Ozette Lake, Washington collected during USGS field activity 2019-622-FA

2-m resolution bathymetry and acoustic backscatter data were collected during a July 2019 SWATHPlus survey of Ozette Lake, Washington. Data were collected and processed by the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) with fieldwork activity number 2019-622-FA. The 2-m data are provided as GeoTIFF images.
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Radiocarbon age dating of biological material from cores collected off British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone Radiocarbon age dating of biological material from cores collected off British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone

Results of radiocarbon age dating of planktic foraminifera, benthic foraminifera, and pelecypod shell fragments collected from piston cores, trigger weight cores, and IKU grab samples obtained in 2015 and 2017 offshore British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone.
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Multichannel minisparker and chirp seismic reflection data collected during USGS field activity 2021-614-FA along the Palos Verdes Fault Zone Multichannel minisparker and chirp seismic reflection data collected during USGS field activity 2021-614-FA along the Palos Verdes Fault Zone

High-resolution multichannel seismic (MCS) and coincident Chirp sub-bottom data were acquired during USGS field activity 2021-614-FA aboard the R/V Sproul in May of 2021. The survey was conducted in the offshore region of southern California, specifically in the inner continental borderlands tectonic region. The focus of the survey was to collect seismic lines perpendicular to the Palos...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Sediment core data from offshore southern Cascadia during field activity 2019-643-FA Sediment core data from offshore southern Cascadia during field activity 2019-643-FA

This data release contains sediment core data including core imagery, multi-sensor core logger (MSCL) data, and radiocarbon age data. Sediment cores were collected offshore northern California during U.S. Geological Survey cruise 2019-643-FA aboard the M/V Bold-Horizon. The cores were collected along with geophysical data to evaluate potential hazards (e.g., active fault systems, slope
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Compiled onshore and offshore paleoseismic data along the Cascadia Subduction zone Compiled onshore and offshore paleoseismic data along the Cascadia Subduction zone

The USGS Powell Center Cascadia earthquake hazards working group compiled published onshore and offshore paleoseismic data along the Cascadia subduction zone, spanning sites from Vancouver Island to the Mendocino triple junction. Evidence for megathrust rupture includes coastal land-level change, tsunami inundation, onshore shaking proxies such as landslides or liquefaction, and offshore...
By
Geology, Minerals, Energy, and Geophysics Science Center, John Wesley Powell Center for Analysis and Synthesis
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Filter Total Items: 57

Reducing risk where tectonic plates collide—U.S. Geological Survey subduction zone science plan Reducing risk where tectonic plates collide—U.S. Geological Survey subduction zone science plan

The U.S. Geological Survey (USGS) serves the Nation by providing reliable scientific information and tools to build resilience in communities exposed to subduction zone earthquakes, tsunamis, landslides, and volcanic eruptions. Improving the application of USGS science to successfully reduce risk from these events relies on whole community efforts, with continuing partnerships among...
Authors
Joan S. Gomberg, K. A. Ludwig, Barbara Bekins, Thomas M. Brocher, John Brock, Daniel S. Brothers, Jason D. Chaytor, Arthur D. Frankel, Eric L. Geist, Matthew M. Haney, Stephen H. Hickman, William S. Leith, Evelyn A. Roeloffs, William H. Schulz, Thomas W. Sisson, Kristi L. Wallace, Janet Watt, Anne M. Wein
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Earthquake Hazards Program, Earthquake Science Center, Geologic Hazards Science Center, Pacific Coastal and Marine Science Center, Subduction Zone Science

Geologic controls on submarine slope failure along the central U.S. Atlantic margin: Insights from the Currituck Slide Complex Geologic controls on submarine slope failure along the central U.S. Atlantic margin: Insights from the Currituck Slide Complex

Multiple styles of failure, ranging from densely spaced, mass transport driven canyons to the large, slab-type slope failure of the Currituck Slide, characterize adjacent sections of the central U.S. Atlantic margin that appear to be defined by variations in geologic framework. Here we use regionally extensive, deep penetration multichannel seismic (MCS) profiles to reconstruct the...
Authors
Jenna C. Hill, Daniel S. Brothers, Bradley K. Craig, Uri S. ten Brink, Jason D. Chaytor, Claudia Flores
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Assessment of canyon wall failure process from multibeam bathymetry and Remotely Operated Vehicle (ROV) observations, U.S. Atlantic continental margin Assessment of canyon wall failure process from multibeam bathymetry and Remotely Operated Vehicle (ROV) observations, U.S. Atlantic continental margin

Over the last few years, canyons along the northern U.S. Atlantic continental margin have been the focus of intensive research examining canyon evolution, submarine geohazards, benthic ecology and deep-sea coral habitat. New high-resolution multibeam bathymetry and Remotely Operated Vehicle (ROV) dives in the major shelf-breaching and minor slope canyons, provided the opportunity to...
Authors
Jason D. Chaytor, Amanda W.J. Demopoulos, Uri S. ten Brink, Christopher D. P. Baxter, Andrea M. Quattrini, Daniel S. Brothers
By
Ecosystems Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

Seismic attribute detection of faults and fluid pathways within an active strike-slip shear zone: New insights from high-resolution 3D P-Cable™ seismic data along the Hosgri Fault, offshore California Seismic attribute detection of faults and fluid pathways within an active strike-slip shear zone: New insights from high-resolution 3D P-Cable™ seismic data along the Hosgri Fault, offshore California

Poststack data conditioning and neural-network seismic attribute workflows are used to detect and visualize faulting and fluid migration pathways within a 13.7 km2 13.7 km2 3D P-Cable™ seismic volume located along the Hosgri Fault Zone offshore central California. The high-resolution 3D volume used in this study was collected in 2012 as part of Pacific Gas and Electric’s Central...
Authors
Jared W. Kluesner, Daniel S. Brothers
By
Pacific Coastal and Marine Science Center

Continental Shelf Morphology and Stratigraphy Offshore San Onofre, CA: The Interplay Between Rates of Eustatic Change and Sediment Supply Continental Shelf Morphology and Stratigraphy Offshore San Onofre, CA: The Interplay Between Rates of Eustatic Change and Sediment Supply

New high-resolution CHIRP seismic data acquired offshore San Onofre, southern California reveal that shelf sediment distribution and thickness are primarily controlled by eustatic sea level rise and sediment supply. Throughout the majority of the study region, a prominent abrasion platform and associated shoreline cutoff are observed in the subsurface from ~ 72 to 53 m below present sea...
Authors
Shannon Klotsko, Neal W. Driscoll, Graham Kent, Daniel S. Brothers
By
Pacific Coastal and Marine Science Center

A submarine landslide source for the devastating 1964 Chenega tsunami, southern Alaska A submarine landslide source for the devastating 1964 Chenega tsunami, southern Alaska

During the 1964 Great Alaska earthquake (Mw 9.2), several fjords, straits, and bays throughout southern Alaska experienced significant tsunami runup of localized, but unexplained origin. Dangerous Passage is a glacimarine fjord in western Prince William Sound, which experienced a tsunami that devastated the village of Chenega where 23 of 75 inhabitants were lost – the highest relative...
Authors
Daniel S. Brothers, Peter J. Haeussler, Lee Liberty, David Finlayson, Eric L. Geist, Keith A. Labay, Michael Byerly
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Pacific Coastal and Marine Science Center

Records of continental slope sediment flow morphodynamic responses to gradient and active faulting from integrated AUV and ROV data, offshore Palos Verdes, southern California Borderland Records of continental slope sediment flow morphodynamic responses to gradient and active faulting from integrated AUV and ROV data, offshore Palos Verdes, southern California Borderland

Variations in seabed gradient are widely acknowledged to influence deep-water deposition, but are often difficult to measure in sufficient detail from both modern and ancient examples. On the continental slope offshore Los Angeles, California, autonomous underwater vehicle, remotely operated vehicle, and shipboard methods were used to collect a dense grid of high-resolution multibeam...
Authors
Katherine L. Maier, Daniel S. Brothers, Charles K. Paull, Mary McGann, David W. Caress, James E. Conrad
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Bathymetric terrain model of the Atlantic margin for marine geological investigations Bathymetric terrain model of the Atlantic margin for marine geological investigations

A bathymetric terrain model of the Atlantic margin covering almost 725,000 square kilometers of seafloor from the New England Seamounts in the north to the Blake Basin in the south is compiled from existing multibeam bathymetric data for marine geological investigations. Although other terrain models of the same area are extant, they are produced from either satellite-derived bathymetry...
Authors
Brian D. Andrews, Jason D. Chaytor, Uri S. ten Brink, Daniel S. Brothers, James V. Gardner, Elizabeth A. Lobecker, Brian R. Calder
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

The Palos Verdes Fault offshore southern California: late Pleistocene to present tectonic geomorphology, seascape evolution and slip rate estimate based on AUV and ROV surveys The Palos Verdes Fault offshore southern California: late Pleistocene to present tectonic geomorphology, seascape evolution and slip rate estimate based on AUV and ROV surveys

The Palos Verdes Fault (PVF) is one of few active faults in Southern California that crosses the shoreline and can be studied using both terrestrial and subaqueous methodologies. To characterize the near-seafloor fault morphology, tectonic influences on continental slope sedimentary processes and late Pleistocene to present slip rate, a grid of high-resolution multibeam bathymetric data...
Authors
Daniel S. Brothers, James E. Conrad, Katherine L. Maier, Charles K. Paull, Mary L. McGann, David W. Caress
By
Pacific Coastal and Marine Science Center

Widespread methane leakage from the sea floor on the northern US Atlantic margin Widespread methane leakage from the sea floor on the northern US Atlantic margin

Methane emissions from the sea floor affect methane inputs into the atmosphere, ocean acidification and de-oxygenation, the distribution of chemosynthetic communities and energy resources. Global methane flux from seabed cold seeps has only been estimated for continental shelves, at 8 to 65 Tg CH4 yr−1, yet other parts of marine continental margins are also emitting methane. The US...
Authors
Adam Skarke, Carolyn Ruppel, Mali’o Kodis, Daniel S. Brothers, Elizabeth A. Lobecker
By
Woods Hole Coastal and Marine Science Center

Chirp seismic-reflection data from the Baltimore, Washington, and Norfolk Canyons, U.S. mid-Atlantic margin Chirp seismic-reflection data from the Baltimore, Washington, and Norfolk Canyons, U.S. mid-Atlantic margin

A large number of high-resolution geophysical surveys between Cape Hatteras and Georges Bank have been conducted by federal, state, and academic institutions since the turn of the century. A major goal of these surveys is providing a continuous view of bathymetry and shallow stratigraphy at the shelf edge in order to assess levels of geological activity during the current sea level...
Authors
Jeffrey B. Obelcz, Daniel S. Brothers, Uri S. ten Brink, Jason D. Chaytor, Charles R. Worley, Eric M. Moore
By
Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

Assessment of tsunami hazard to the U.S. Atlantic margin Assessment of tsunami hazard to the U.S. Atlantic margin

Tsunami hazard is a very low-probability, but potentially high-risk natural hazard, posing unique challenges to scientists and policy makers trying to mitigate its impacts. These challenges are illustrated in this assessment of tsunami hazard to the U.S. Atlantic margin. Seismic activity along the U.S. Atlantic margin in general is low, and confirmed paleo-tsunami deposits have not yet...
Authors
Uri S. ten Brink, Jason D. Chaytor, Eric L. Geist, Daniel S. Brothers, Brian D. Andrews
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

Non-USGS Publications**

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

Filter Total Items: 17

Science and Products

A map illustration of the seafloor off of a coastal area, that shows the features like submarine canyons and depth.

Cascadia Subduction Zone Marine Geohazards

Societal Issue: Uncertainty related to rupture extent, slip distribution, and recurrence of past subduction megathrust earthquakes in the Pacific Northwest (northern CA, OR, WA, and southern BC) leads to ambiguity in earthquake and tsunami hazard assessments and hinders our ability to prepare for future events.
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Santa Cruz Core Scanning Laboratory, Santa Cruz Core Laboratories, Santa Cruz Core Splitting Laboratory, Deep Sea Exploration, Mapping and Characterization, Subduction Zone Science
Cascadia Subduction Zone Marine Geohazards

Cascadia Subduction Zone Marine Geohazards

Societal Issue: Uncertainty related to rupture extent, slip distribution, and recurrence of past subduction megathrust earthquakes in the Pacific Northwest (northern CA, OR, WA, and southern BC) leads to ambiguity in earthquake and tsunami hazard assessments and hinders our ability to prepare for future events.
Learn More
Cartoon shows a cylindrical object that is floating above and scanning a landscape with rocky outcroppings.

Seafloor Faults off Southern California

More than 22 million people live along Southern California’s coast, and many more migrate there every year. Faults and earthquake threats in this region have been heavily studied on land. USGS aims to boost our knowledge about faults on the seafloor, so they can be included in hazard assessments.
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
Seafloor Faults off Southern California

Seafloor Faults off Southern California

More than 22 million people live along Southern California’s coast, and many more migrate there every year. Faults and earthquake threats in this region have been heavily studied on land. USGS aims to boost our knowledge about faults on the seafloor, so they can be included in hazard assessments.
Learn More
A bottomfish with small, bright spots lazily swims over a rocky seafloor among a few small pieces of kelp.

Ecosystems: EXPRESS

The continental shelf and slope offshore California, Oregon, and Washington are home to deep-sea corals, chemosynthetic communities, and other sensitive habitats that could be impacted by the development of energy and mineral resources. The EXPRESS (Expanding Pacific Research and Exploration of Submerged Systems) campaign will map and characterize these special areas to help guide ocean management...
By
Ecosystems Mission Area, Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
Ecosystems: EXPRESS

Ecosystems: EXPRESS

The continental shelf and slope offshore California, Oregon, and Washington are home to deep-sea corals, chemosynthetic communities, and other sensitive habitats that could be impacted by the development of energy and mineral resources. The EXPRESS (Expanding Pacific Research and Exploration of Submerged Systems) campaign will map and characterize these special areas to help guide ocean management...
Learn More
Map of offshore southern California showing the contours of the seafloor, with labels pointing to circles showing landslides.

Hazards: EXPRESS

Marine geohazards including earthquakes, landslides, and tsunamis lie offshore of densely populated areas of California, Oregon, and Washington. One goal of EXPRESS is to improve assessments of these hazards.
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Santa Cruz Core Scanning Laboratory, Santa Cruz Core Laboratories, Santa Cruz Core Splitting Laboratory, Deep Sea Exploration, Mapping and Characterization
Hazards: EXPRESS

Hazards: EXPRESS

Marine geohazards including earthquakes, landslides, and tsunamis lie offshore of densely populated areas of California, Oregon, and Washington. One goal of EXPRESS is to improve assessments of these hazards.
Learn More
A computed-generated image showing the Queen Charlotte Fault and nearshore area, using bathymetry and lidar data

Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. These underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis. The tectonically active west coast of the Americas is prone to such hazards, as it lies along the boundaries of major tectonic plates that make up the Earth's crust—the North American, Caribbean...
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Santa Cruz Core Scanning Laboratory, Santa Cruz Core Laboratories, Big Sur Landslides, Deep Sea Exploration, Mapping and Characterization, Subduction Zone Science
Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and Marine Geohazards of the U.S. West Coast and Alaska

Coastal and marine geohazards are sudden and extreme events beneath the ocean that threaten coastal populations. These underwater hazards include earthquakes, volcanic eruptions, landslides, and tsunamis. The tectonically active west coast of the Americas is prone to such hazards, as it lies along the boundaries of major tectonic plates that make up the Earth's crust—the North American, Caribbean...
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Image shows methane bubbling up from the seafloor

EXPRESS: Expanding Pacific Research and Exploration of Submerged Systems

EXPRESS is a multi-year, multi-institution cooperative research campaign in deep sea areas of California, Oregon, and Washington, including the continental shelf and slope. EXPRESS data and information are intended to guide wise use of living marine resources and habitats, inform ocean energy and mineral resource decisions, and improve offshore hazard assessments.
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Santa Cruz Core Scanning Laboratory, Santa Cruz Core Laboratories, Santa Cruz Core Splitting Laboratory, Organic Geochemistry Laboratory, Deep Sea Exploration, Mapping and Characterization
EXPRESS: Expanding Pacific Research and Exploration of Submerged Systems

EXPRESS: Expanding Pacific Research and Exploration of Submerged Systems

EXPRESS is a multi-year, multi-institution cooperative research campaign in deep sea areas of California, Oregon, and Washington, including the continental shelf and slope. EXPRESS data and information are intended to guide wise use of living marine resources and habitats, inform ocean energy and mineral resource decisions, and improve offshore hazard assessments.
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Block Island Wind Farm

Resources: EXPRESS

Along the U.S. west coast, the Pacific Ocean, ocean floor, and winds above contain potentially vast energy and mineral resources. Developing these resources safely and wisely requires detailed information for each area of interest. One goal of EXPRESS is to inform ocean energy and mineral resource decisions.
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
Resources: EXPRESS

Resources: EXPRESS

Along the U.S. west coast, the Pacific Ocean, ocean floor, and winds above contain potentially vast energy and mineral resources. Developing these resources safely and wisely requires detailed information for each area of interest. One goal of EXPRESS is to inform ocean energy and mineral resource decisions.
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Map illustration showing fault lines and direction of tectonic plate movement along a stretch of the Alaskan coastline.

Earthquake Hazards in Southeastern Alaska

Over the last 100 years, the Queen Charlotte-Fairweather fault system has produced large-magnitude earthquakes affecting both Canada and the U.S. To fill in missing details about its offshore location and structure, USGS uses sophisticated techniques to truly understand the fault’s hazard potential.
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
Earthquake Hazards in Southeastern Alaska

Earthquake Hazards in Southeastern Alaska

Over the last 100 years, the Queen Charlotte-Fairweather fault system has produced large-magnitude earthquakes affecting both Canada and the U.S. To fill in missing details about its offshore location and structure, USGS uses sophisticated techniques to truly understand the fault’s hazard potential.
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An illustrated map shows seafloor features and is labeled with dots to show where samples were collected.

2019 Lake Ozette

Collected bathymetric data, seismic data, and sediment cores from Lake Ozette in 2019, a USGS-US National Park Service partnership
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
2019 Lake Ozette

2019 Lake Ozette

Collected bathymetric data, seismic data, and sediment cores from Lake Ozette in 2019, a USGS-US National Park Service partnership
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Multibeam bathymetry data and gridded surfaces for Lake Chelan, Washington, collected during USGS field activity 2023-631-FA Multibeam bathymetry data and gridded surfaces for Lake Chelan, Washington, collected during USGS field activity 2023-631-FA

3-m bathymetry and acoustic-backscatter data were collected during a June 2023 multibeam survey of Lake Chelan, Washington. Data were collected and processed by the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) with fieldwork activity number 2023-631-FA. The 3-m data are provided as GeoTIFF images.
By
Pacific Coastal and Marine Science Center

Sediment core data from the Great Salt Lake, Utah Sediment core data from the Great Salt Lake, Utah

This data release includes measurements of properties from short (
By
Geologic Hazards Science Center

Sublacustrine landslide and tsunami models from Lake Quinault, Washington Sublacustrine landslide and tsunami models from Lake Quinault, Washington

This USGS data release provides model setup files to simulate a hypothetical sublacustrine landslide in Lake Quinault and resulting tsunami waves.
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Pacific Coastal and Marine Science Center

Bathymetry and acoustic-backscatter data for Lake Sammamish, Washington collected during USGS field activity 2021-656-FA Bathymetry and acoustic-backscatter data for Lake Sammamish, Washington collected during USGS field activity 2021-656-FA

The Pacific Northwest is home to numerous faults that cut through the surrounding crust including the Seattle fault. Over time, frictional stresses accumulate along these faults, building slowly until they exceed the fault's strength, resulting in an earthquake. Evidence of these earthquakes may be found in Pacific Northwest lakes. Past underwater landslides caused by the earthquakes...
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Pacific Coastal and Marine Science Center

Chirp sub-bottom data collected in the Great Salt Lake, Utah during USGS field activity 2021-615-FA Chirp sub-bottom data collected in the Great Salt Lake, Utah during USGS field activity 2021-615-FA

This data release contains 57 high-resolution chirp sub-bottom profiles collected in the southern Great Salt Lake, Utah, by the U.S. Geological Survey in June 2021 during field activity 2021-615-FA. The dataset was acquired to image subsurface sedimentary structures and stratigraphy in support of efforts to characterize past earthquake events along the Great Salt Lake Fault, contributing...
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Pacific Coastal and Marine Science Center

Multibeam line files from Cross Sound, Alaska collected during USGS field activity 2015-629-FA Multibeam line files from Cross Sound, Alaska collected during USGS field activity 2015-629-FA

In 2015 the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) in cooperation with the Alaska Department of Fish and Game (ADFG) collected bathymetry and acoustic backscatter data offshore Cross Sound in southeast Alaska using an Reson 7111 multibeam echosounder mounded to the ADFG R/V Solstice. The survey was conducted to map the offshore expression of the...
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Pacific Coastal and Marine Science Center

Seismic sub-bottom, sediment core and radiocarbon data collected in Ozette Lake, Washington from 2019-2021 Seismic sub-bottom, sediment core and radiocarbon data collected in Ozette Lake, Washington from 2019-2021

Seismic-reflection data and cores were collected in Ozette Lake, Washington, from 2019 to 2021. These data were used to investigate submarine landslide deposits triggered by large Cascadia Subduction Zone earthquakes. Identification of fault-related submarine hazards is a primary mission of the USGS Coastal and Marine Geology Program. In the US Pacific Northwest region, the greatest...
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Bathymetry and acoustic-backscatter data for Ozette Lake, Washington collected during USGS field activity 2019-622-FA Bathymetry and acoustic-backscatter data for Ozette Lake, Washington collected during USGS field activity 2019-622-FA

2-m resolution bathymetry and acoustic backscatter data were collected during a July 2019 SWATHPlus survey of Ozette Lake, Washington. Data were collected and processed by the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) with fieldwork activity number 2019-622-FA. The 2-m data are provided as GeoTIFF images.
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Radiocarbon age dating of biological material from cores collected off British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone Radiocarbon age dating of biological material from cores collected off British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone

Results of radiocarbon age dating of planktic foraminifera, benthic foraminifera, and pelecypod shell fragments collected from piston cores, trigger weight cores, and IKU grab samples obtained in 2015 and 2017 offshore British Columbia, Canada and southeastern Alaska, U.S. along the Queen Charlotte-Fairweather fault zone.
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Multichannel minisparker and chirp seismic reflection data collected during USGS field activity 2021-614-FA along the Palos Verdes Fault Zone Multichannel minisparker and chirp seismic reflection data collected during USGS field activity 2021-614-FA along the Palos Verdes Fault Zone

High-resolution multichannel seismic (MCS) and coincident Chirp sub-bottom data were acquired during USGS field activity 2021-614-FA aboard the R/V Sproul in May of 2021. The survey was conducted in the offshore region of southern California, specifically in the inner continental borderlands tectonic region. The focus of the survey was to collect seismic lines perpendicular to the Palos...
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Sediment core data from offshore southern Cascadia during field activity 2019-643-FA Sediment core data from offshore southern Cascadia during field activity 2019-643-FA

This data release contains sediment core data including core imagery, multi-sensor core logger (MSCL) data, and radiocarbon age data. Sediment cores were collected offshore northern California during U.S. Geological Survey cruise 2019-643-FA aboard the M/V Bold-Horizon. The cores were collected along with geophysical data to evaluate potential hazards (e.g., active fault systems, slope
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Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Compiled onshore and offshore paleoseismic data along the Cascadia Subduction zone Compiled onshore and offshore paleoseismic data along the Cascadia Subduction zone

The USGS Powell Center Cascadia earthquake hazards working group compiled published onshore and offshore paleoseismic data along the Cascadia subduction zone, spanning sites from Vancouver Island to the Mendocino triple junction. Evidence for megathrust rupture includes coastal land-level change, tsunami inundation, onshore shaking proxies such as landslides or liquefaction, and offshore...
By
Geology, Minerals, Energy, and Geophysics Science Center, John Wesley Powell Center for Analysis and Synthesis
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Reducing risk where tectonic plates collide—U.S. Geological Survey subduction zone science plan Reducing risk where tectonic plates collide—U.S. Geological Survey subduction zone science plan

The U.S. Geological Survey (USGS) serves the Nation by providing reliable scientific information and tools to build resilience in communities exposed to subduction zone earthquakes, tsunamis, landslides, and volcanic eruptions. Improving the application of USGS science to successfully reduce risk from these events relies on whole community efforts, with continuing partnerships among...
Authors
Joan S. Gomberg, K. A. Ludwig, Barbara Bekins, Thomas M. Brocher, John Brock, Daniel S. Brothers, Jason D. Chaytor, Arthur D. Frankel, Eric L. Geist, Matthew M. Haney, Stephen H. Hickman, William S. Leith, Evelyn A. Roeloffs, William H. Schulz, Thomas W. Sisson, Kristi L. Wallace, Janet Watt, Anne M. Wein
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Earthquake Hazards Program, Earthquake Science Center, Geologic Hazards Science Center, Pacific Coastal and Marine Science Center, Subduction Zone Science

Geologic controls on submarine slope failure along the central U.S. Atlantic margin: Insights from the Currituck Slide Complex Geologic controls on submarine slope failure along the central U.S. Atlantic margin: Insights from the Currituck Slide Complex

Multiple styles of failure, ranging from densely spaced, mass transport driven canyons to the large, slab-type slope failure of the Currituck Slide, characterize adjacent sections of the central U.S. Atlantic margin that appear to be defined by variations in geologic framework. Here we use regionally extensive, deep penetration multichannel seismic (MCS) profiles to reconstruct the...
Authors
Jenna C. Hill, Daniel S. Brothers, Bradley K. Craig, Uri S. ten Brink, Jason D. Chaytor, Claudia Flores
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Assessment of canyon wall failure process from multibeam bathymetry and Remotely Operated Vehicle (ROV) observations, U.S. Atlantic continental margin Assessment of canyon wall failure process from multibeam bathymetry and Remotely Operated Vehicle (ROV) observations, U.S. Atlantic continental margin

Over the last few years, canyons along the northern U.S. Atlantic continental margin have been the focus of intensive research examining canyon evolution, submarine geohazards, benthic ecology and deep-sea coral habitat. New high-resolution multibeam bathymetry and Remotely Operated Vehicle (ROV) dives in the major shelf-breaching and minor slope canyons, provided the opportunity to...
Authors
Jason D. Chaytor, Amanda W.J. Demopoulos, Uri S. ten Brink, Christopher D. P. Baxter, Andrea M. Quattrini, Daniel S. Brothers
By
Ecosystems Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

Seismic attribute detection of faults and fluid pathways within an active strike-slip shear zone: New insights from high-resolution 3D P-Cable™ seismic data along the Hosgri Fault, offshore California Seismic attribute detection of faults and fluid pathways within an active strike-slip shear zone: New insights from high-resolution 3D P-Cable™ seismic data along the Hosgri Fault, offshore California

Poststack data conditioning and neural-network seismic attribute workflows are used to detect and visualize faulting and fluid migration pathways within a 13.7 km2 13.7 km2 3D P-Cable™ seismic volume located along the Hosgri Fault Zone offshore central California. The high-resolution 3D volume used in this study was collected in 2012 as part of Pacific Gas and Electric’s Central...
Authors
Jared W. Kluesner, Daniel S. Brothers
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Pacific Coastal and Marine Science Center

Continental Shelf Morphology and Stratigraphy Offshore San Onofre, CA: The Interplay Between Rates of Eustatic Change and Sediment Supply Continental Shelf Morphology and Stratigraphy Offshore San Onofre, CA: The Interplay Between Rates of Eustatic Change and Sediment Supply

New high-resolution CHIRP seismic data acquired offshore San Onofre, southern California reveal that shelf sediment distribution and thickness are primarily controlled by eustatic sea level rise and sediment supply. Throughout the majority of the study region, a prominent abrasion platform and associated shoreline cutoff are observed in the subsurface from ~ 72 to 53 m below present sea...
Authors
Shannon Klotsko, Neal W. Driscoll, Graham Kent, Daniel S. Brothers
By
Pacific Coastal and Marine Science Center

A submarine landslide source for the devastating 1964 Chenega tsunami, southern Alaska A submarine landslide source for the devastating 1964 Chenega tsunami, southern Alaska

During the 1964 Great Alaska earthquake (Mw 9.2), several fjords, straits, and bays throughout southern Alaska experienced significant tsunami runup of localized, but unexplained origin. Dangerous Passage is a glacimarine fjord in western Prince William Sound, which experienced a tsunami that devastated the village of Chenega where 23 of 75 inhabitants were lost – the highest relative...
Authors
Daniel S. Brothers, Peter J. Haeussler, Lee Liberty, David Finlayson, Eric L. Geist, Keith A. Labay, Michael Byerly
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Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Pacific Coastal and Marine Science Center

Records of continental slope sediment flow morphodynamic responses to gradient and active faulting from integrated AUV and ROV data, offshore Palos Verdes, southern California Borderland Records of continental slope sediment flow morphodynamic responses to gradient and active faulting from integrated AUV and ROV data, offshore Palos Verdes, southern California Borderland

Variations in seabed gradient are widely acknowledged to influence deep-water deposition, but are often difficult to measure in sufficient detail from both modern and ancient examples. On the continental slope offshore Los Angeles, California, autonomous underwater vehicle, remotely operated vehicle, and shipboard methods were used to collect a dense grid of high-resolution multibeam...
Authors
Katherine L. Maier, Daniel S. Brothers, Charles K. Paull, Mary McGann, David W. Caress, James E. Conrad
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Bathymetric terrain model of the Atlantic margin for marine geological investigations Bathymetric terrain model of the Atlantic margin for marine geological investigations

A bathymetric terrain model of the Atlantic margin covering almost 725,000 square kilometers of seafloor from the New England Seamounts in the north to the Blake Basin in the south is compiled from existing multibeam bathymetric data for marine geological investigations. Although other terrain models of the same area are extant, they are produced from either satellite-derived bathymetry...
Authors
Brian D. Andrews, Jason D. Chaytor, Uri S. ten Brink, Daniel S. Brothers, James V. Gardner, Elizabeth A. Lobecker, Brian R. Calder
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Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

The Palos Verdes Fault offshore southern California: late Pleistocene to present tectonic geomorphology, seascape evolution and slip rate estimate based on AUV and ROV surveys The Palos Verdes Fault offshore southern California: late Pleistocene to present tectonic geomorphology, seascape evolution and slip rate estimate based on AUV and ROV surveys

The Palos Verdes Fault (PVF) is one of few active faults in Southern California that crosses the shoreline and can be studied using both terrestrial and subaqueous methodologies. To characterize the near-seafloor fault morphology, tectonic influences on continental slope sedimentary processes and late Pleistocene to present slip rate, a grid of high-resolution multibeam bathymetric data...
Authors
Daniel S. Brothers, James E. Conrad, Katherine L. Maier, Charles K. Paull, Mary L. McGann, David W. Caress
By
Pacific Coastal and Marine Science Center

Widespread methane leakage from the sea floor on the northern US Atlantic margin Widespread methane leakage from the sea floor on the northern US Atlantic margin

Methane emissions from the sea floor affect methane inputs into the atmosphere, ocean acidification and de-oxygenation, the distribution of chemosynthetic communities and energy resources. Global methane flux from seabed cold seeps has only been estimated for continental shelves, at 8 to 65 Tg CH4 yr−1, yet other parts of marine continental margins are also emitting methane. The US...
Authors
Adam Skarke, Carolyn Ruppel, Mali’o Kodis, Daniel S. Brothers, Elizabeth A. Lobecker
By
Woods Hole Coastal and Marine Science Center

Chirp seismic-reflection data from the Baltimore, Washington, and Norfolk Canyons, U.S. mid-Atlantic margin Chirp seismic-reflection data from the Baltimore, Washington, and Norfolk Canyons, U.S. mid-Atlantic margin

A large number of high-resolution geophysical surveys between Cape Hatteras and Georges Bank have been conducted by federal, state, and academic institutions since the turn of the century. A major goal of these surveys is providing a continuous view of bathymetry and shallow stratigraphy at the shelf edge in order to assess levels of geological activity during the current sea level...
Authors
Jeffrey B. Obelcz, Daniel S. Brothers, Uri S. ten Brink, Jason D. Chaytor, Charles R. Worley, Eric M. Moore
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Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center

Assessment of tsunami hazard to the U.S. Atlantic margin Assessment of tsunami hazard to the U.S. Atlantic margin

Tsunami hazard is a very low-probability, but potentially high-risk natural hazard, posing unique challenges to scientists and policy makers trying to mitigate its impacts. These challenges are illustrated in this assessment of tsunami hazard to the U.S. Atlantic margin. Seismic activity along the U.S. Atlantic margin in general is low, and confirmed paleo-tsunami deposits have not yet...
Authors
Uri S. ten Brink, Jason D. Chaytor, Eric L. Geist, Daniel S. Brothers, Brian D. Andrews
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center

Non-USGS Publications**

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

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