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Patrick Hart

Geophysicist Emeritus with the USGS Pacific Coastal and Marine Science Center

Science and Products

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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, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Big Sur Landslides, Deep Sea Exploration, Mapping and Characterization, Subduction Zone Science
link

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
link
Image: Gas Hydrates Burning

U.S. Geological Survey Gas Hydrates Project

The USGS Gas Hydrates Project has been making contributions to advance understanding of US and international gas hydrates science for at least three decades. The research group working on gas hydrates at the USGS is among the largest in the US and has expertise in all the major geoscience disciplines, as well as in the physics and chemistry of gas hydrates, the geotechnical properties of hydrate...
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
link

U.S. Geological Survey Gas Hydrates Project

The USGS Gas Hydrates Project has been making contributions to advance understanding of US and international gas hydrates science for at least three decades. The research group working on gas hydrates at the USGS is among the largest in the US and has expertise in all the major geoscience disciplines, as well as in the physics and chemistry of gas hydrates, the geotechnical properties of hydrate...
Learn More
Filter Total Items: 19

Island of Hawaii bird, mosquito, and avian malaria infection data 2001-2004

This data publication contains data files collected as part of a field, laboratory, and modeling effort aimed at uncovering ecological drivers of avian malaria transmission and impacts on Hawaiian honeycreepers across an elevational gradient on the eastern flank of Mauna Loa and Kilauea volcanoes on Hawaii Island. From 2001-2004, mosquito and bird data were collected at nine sites ranging 25 to 1,
By
Pacific Island Ecosystems Research Center

High-resolution multichannel sparker seismic-reflection and chirp sub-bottom data acquired along the Cascadia margin during USGS field activity 2019-024-FA

High-resolution multichannel sparker seismic (MCS) data and chirp sub-bottom data were collected by the U.S. Geological Survey in collaboration with the University of Washington (UW) in the summer of 2019 along the Cascadia submarine forearc offshore Oregon and Washington. Data were acquired to characterize quaternary deformation and sediment dynamics along the central and northern Cascadia margin
By
Pacific Coastal and Marine Science Center

Multichannel minisparker seismic-reflection data collected offshore Glacier Bay National Park during USGS field activity 2015-629-FA

Multichannel seismic reflection data were collected by the U.S. Geological Survey in May of 2015 outside of Palma Bay, Alaska. Seismic data were acquired coincidentally with high resolution bathymetry (Dartnell and others, 2022). Data were acquired to map the offshore extension of the Queen Charlotte-Fairweather Fault. The fault has produced several significant earthquakes during the last 150 year
By
Pacific Coastal and Marine Science Center

Hawaii Island forest bird movement data from 2014 to 2019

This data release includes data and metadata containing estimated and predicted locations of radio telemetered Hawaiian forest birds. Radio telemetry data was collected using an automated radio telemetry network from 2014 to 2019 from birds in two study sites, one a continuous forest and the other a fragmented forest. Four bird species that varied in age and sex were studied: the nectarivorous ʻiʻ
By
Pacific Island Ecosystems Research Center

Multichannel sparker and chirp seismic reflection data collected offshore South East Alaska during USGS Field Activity 2017-621-FA

High-resolution multichannel seismic reflection data and chirp sub-bottom data were collected by the U.S. Geological Survey in July and August 2017 offshore southeast Alaska to expand data coverage along the Queen Charlotte Fault system. Data were acquired to study earthquake hazards, fault mechanics and submarine mass wasting processes along the Queen Charlotte fault system, a 1200 km long transf
By
Pacific Coastal and Marine Science Center

Calibrated marine sparker source amplitude decay versus offset offshore Santa Cruz, California

This two-vessel survey was designed to quantify the decay of sound emitted from the SIG ELP790 minisparker (powered at 700 joules) and from the Applied Acoustics Delta Sparker (powered at 1.0 and 2.4 kilojoules) as a function of distance during marine geophysical surveys. Seven transect sites were surveyed at five different water depths (25, 50, 100, 200, and 600 meters) to compare the effects of
By
Pacific Coastal and Marine Science Center

Gridded Data from a 2011 Multibeam Bathymetric Survey of the Western Part of Passage Canal, Near Whittier, Alaska

This data release provides bathymetry data for the western part of Passage Canal, near Whittier Alaska. It was collected by the USGS Pacific Coastal and Marine Science Center in 2011 under Field Activity Number A0111GA. The data release consists of a 5 m grid, derived from processed and cleaned multibeam data. Depths were corrected for tidal variations and calculated using conductivity, temperatur
By
Alaska Science Center

High-resolution multi-channel and Chirp seismic-reflection data from USGS cruise 2018-641-FA collected in south-central California in support of the Bureau of Ocean Energy Management Cal DIG I offshore alternative energy project

This dataset is one of several collected as part of the Bureau of Ocean Energy Management (BOEM)-funded California Deepwater Investigations and Groundtruthing (Cal DIG I) project. The purpose of the study is to assess shallow geohazards, benthic habitats, and thereby the potential for alternative energy infrastructure (namely floating wind turbines) offshore south-central California due to its pro
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Multichannel minisparker, multichannel boomer, and chirp seismic-reflection data of USGS field activity 2017-612-FA collected in Puget Sound and Lake Washington in February of 2017

High-resolution multichannel minisparker, multichannel boomer and chirp seismic-reflection data were collected by the U.S. Geological Survey and the University of Washington in February of 2017 west of Seattle in Puget Sound and in Lake Washington, Washington. Data were collected aboard University of Washington's R/V Clifford A. Barnes during USGS field activity 2017-612-FA. Sub-bottom acoustic pe
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Chirp sub-bottom data of USGS field activity K0211PS collected in Puget Sound, Washington in April of 2011

High-resolution chirp sub-bottom data were collected by the U.S. Geological Survey in April 2011 south of Bainbridge Island and west of Seattle in Puget Sound, Washington. Data were collected aboard the R/V Karluk during field activity K0211PS using an Edgetech SB-512i sub-bottom profiler. Sub-bottom acoustic penetration spans several tens of meters and is variable by location.
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Chirp, multichannel minisparker, and boomer seismic-reflection data from USGS field activity G-01-13-GA collected in Port Valdez, Alaska, in September 2013

Multichannel minisparker and boomer seismic-reflection and chirp sub bottom data were collected by the U.S. Geological Survey in September of 2013 in Port Valdez, Alaska. Data were collected aboard the USGS R/V Alaskan Gyre during field activity G-01-13-GA. Sub-bottom acoustic penetration spans several hundreds of meters and is variable by location. High-resolution multichannel seismic-reflection
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Multichannel minisparker and chirp seismic reflection data of USGS field activity 2016-616-FA collected in the Catalina Basin offshore southern California in February 2016

This data release contains 25 multichannel minisparker seismic reflection (MCS) profiles and 41 chirp sub-bottom profiles that were collected in February of 2016 from the Catalina Basin offshore southern California by the U.S. Geological Survey Pacific and Coastal Marine Science Center in cooperation with the University of Washington. Data were collected aboard the University of Washington's R/V T
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

California State Waters Map Series: Offshore of Refugio Beach, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and visualization of swath sonar
By
Pacific Coastal and Marine Science Center

California State Waters Map Series: Offshore of Coal Oil Point, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and
By
Pacific Coastal and Marine Science Center

California State Waters Map Series: offshore of Santa Barbara, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

California State Waters Map Series: Offshore of Carpinteria, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and
By
Pacific Coastal and Marine Science Center

California State Waters Map Series — Offshore of Ventura, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and
By
Pacific Coastal and Marine Science Center

California State Waters Map Series: Offshore of Santa Barbara, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and
By
Pacific Coastal and Marine Science Center
Two people maneuver big floats attached to hoses and equipment off the stern of a ship.
Components of oceanic seismic survey equipment
Components of oceanic seismic survey equipment
Two people maneuver big floats attached to hoses and equipment off the stern of a ship.

Components of oceanic seismic survey equipment

Components of oceanic seismic survey equipment

USGS technicians Eric Moore (left) and Jenny White deploy air guns (silver cylinders), compressor hose (black), and orange buoys at the start of a seismic survey to explore gas hydrates in the deepwater Gulf of Mexico.

By
Pacific Coastal and Marine Science Center
Two people maneuver big floats attached to hoses and equipment off the stern of a ship.

Components of oceanic seismic survey equipment

Components of oceanic seismic survey equipment

USGS technicians Eric Moore (left) and Jenny White deploy air guns (silver cylinders), compressor hose (black), and orange buoys at the start of a seismic survey to explore gas hydrates in the deepwater Gulf of Mexico.

By
Pacific Coastal and Marine Science Center
A crane removes a large metal container off of a ship sitting at the dock.
Craning off seismic equipment
Craning off seismic equipment
A crane removes a large metal container off of a ship sitting at the dock.

Craning off seismic equipment

Craning off seismic equipment

Seismic equipment is craned off research vessel Pelican at the dock in Cocodrie, Louisiana, after a 15-day expedition to explore gas hydrates in the deepwater Gulf of Mexico.

By
Pacific Coastal and Marine Science Center
A crane removes a large metal container off of a ship sitting at the dock.

Craning off seismic equipment

Craning off seismic equipment

Seismic equipment is craned off research vessel Pelican at the dock in Cocodrie, Louisiana, after a 15-day expedition to explore gas hydrates in the deepwater Gulf of Mexico.

By
Pacific Coastal and Marine Science Center
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Jenny White and Tom O'Brien prepare lead weight to be added for proper ballasting of the seismic streamer on the fantail of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Jenny White and Tom O'Brien prepare lead weight to be added for proper ballasting of the seismic streamer on the fantail of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Eric Moore, Wayne Baldwin, and Tom O'Brien ready the 72-channel digital streamer for deployment on the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Eric Moore, Wayne Baldwin, and Tom O'Brien ready the 72-channel digital streamer for deployment on the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Eric Moore and Jenny White deploy instruments at the start of a seismic survey to explore gas hydrates in the deepwater Gulf of Mexico from April to May 2013.

By
Energy and Minerals Mission Area, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Eric Moore and Jenny White deploy instruments at the start of a seismic survey to explore gas hydrates in the deepwater Gulf of Mexico from April to May 2013.

By
Energy and Minerals Mission Area, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS co-chief scientist Seth Haines and technician Tom O’Brien work on data acquisition and analysis in the laboratory of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS co-chief scientist Seth Haines and technician Tom O’Brien work on data acquisition and analysis in the laboratory of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technician Jenny White and Ray Sliter check instruments on the fantail of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technician Jenny White and Ray Sliter check instruments on the fantail of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Filter Total Items: 38

Categorizing active marine acoustic sources based on their potential to affect marine animals

Marine acoustic sources are widely used for geophysical imaging, oceanographic sensing, and communicating with and tracking objects or robotic vehicles in the water column. Under the U.S. Marine Mammal Protection Act and similar regulations in several other countries, the impact of controlled acoustic sources is assessed based on whether the sound levels received by marine mammals meet the criteri
Authors
Carolyn D. Ruppel, T.S. Weber, Erica Staaterman, Stanley Labak, Patrick E. Hart
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Gas hydrates on Alaskan marine margins

Gas hydrate distributions on the marine margins of the U.S. state of Alaska are more poorly known than those on other U.S. margins, where bottom simulating reflections have been systematically mapped on marine seismic data to support modern, quantitative assessments of gas-in-place in gas hydrates. The extent of bottom simulating reflections in the U.S. Beaufort Sea has been known since the late 1
Authors
Carolyn D. Ruppel, Patrick E. Hart
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Gas hydrate quantification in Walker Ridge block 313, Gulf of Mexico, from full-waveform inversion of ocean-bottom seismic data

The Gulf of Mexico (GOM) Joint Industry Project Leg 2 logging-while-drilling data in Walker Ridge lease block 313 (WR313) in the GOM detected gas hydrate in coarse- and fine-grained sediments at sites WR313-G and WR313-H. The coarse-grained units are thin (⁠<10  m⁠) and highly saturated, whereas the fine-grained unit is thick (approximately 200 m) with low saturation and fracture-filling gas hydra
Authors
Jiliang Wang, Priyank Jaiswal, Seth S. Haines, Yihong Yang, Patrick E. Hart
By
Energy Resources Program, Central Energy Resources Science Center, Pacific Coastal and Marine Science Center

Submarine landslide kinematics derived from high-resolution imaging in Port Valdez, Alaska

Submarine landslides caused by strong ground shaking during the M9.2 1964 Great Alaska earthquake generated a tsunami that destroyed much of the old town of Valdez, Alaska, and was responsible for 32 deaths at that location. We explore structural details of the 1964 landslide deposit, as well as landslide deposits from earlier events, in order to characterize kinematics of the landslide process. W
Authors
Emily Roland, Peter J. Haeussler, Thomas E. Parsons, Patrick E. Hart
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Alaska Science Center, Pacific Coastal and Marine Science Center

Measurement of sounds emitted by certain high-resolution geophysical survey systems

Scientific questions regarding the impact of anthropomorphic noise in the marine environment have resulted in an increasing number of regulatory requirements and precautionary mitigation strategies to reduce the risks associated with high-resolution marine geophysical surveys performed in waters subjected to government jurisdiction. An example of regulatory frameworks includes the Marine Mammal Pr
Authors
Steven E Crocker, Frank D Fratantonio, Patrick E. Hart, David S. Foster, Thomas F. O'Brien, Stanley Labak
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

Practical approaches to maximizing the resolution of sparker seismic reflection data

Sparkers are a type of sound source widely used by the marine seismic community to provide high-resolution imagery of the shallow sub-bottom (i.e., < 1000 m). Although sparkers are relatively simple, inexpensive, and high-frequency (100–2500 Hz) sources, they have several potential pitfalls due to their complicated and unpredictable signature. In this study we quantify the source characteristics o
Authors
Jared W. Kluesner, Daniel S. Brothers, Patrick E. Hart, Nathaniel C. Miller, Gerry Hatcher
By
National Innovation Center, Pacific Coastal and Marine Science Center

Controls on submarine canyon head evolution: Monterey Canyon, offshore central California

The Monterey submarine canyon, incised across the continental shelf in Monterey Bay, California, provides a record of the link between onshore tectonism, fluvial transport, and deep-marine deposition. High-resolution seismic-reflection imaging in Monterey Bay reveals an extensive paleocanyon unit buried below the seafloor of the continental shelf around Monterey and Soquel canyon heads. Paleocanyo
Authors
Katherine L. Maier, Samuel Y. Johnson, Patrick E. Hart
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Gas hydrate quantification using full-waveform inversion of sparse ocean-bottom seismic data: A case study from Green Canyon Block 955, Gulf of Mexico

We present a case study of gas hydrate quantification using dense short-offset multichannel seismic (MCS) and sparse long-offset ocean-bottom-seismometer (OBS) data in lease block Green Canyon 955 (GC955), Gulf of Mexico (GOM), where the presence of gas hydrate was interpreted using logging while drilling (LWD) data acquired by the GOM Gas Hydrate Joint Industry Project Leg II expedition. We use f
Authors
Jiliang Wang, Priyank Jaiswal, Seth S. Haines, Patrick E. Hart, Shiguo Wu
By
Energy Resources Program, Central Energy Resources Science Center

High-resolution seismic imaging of depositional characteristics at gas hydrate research sites in the Gulf of Mexico

No abstract available.
Authors
Seth S. Haines, Timothy S. Collett, Patrick E. Hart, B. Shedd, P. Weimer, M. Frye, R. Boswell
By
Energy Resources Program, Central Energy Resources Science Center

High-resolution seismic characterization of the gas and gas hydrate system at Green Canyon 955, Gulf of Mexico, USA

The Pliocene and Pleistocene sediments at lease block Green Canyon 955 (GC955) in the Gulf of Mexico include sand-rich strata with high saturations of gas hydrate; these gas hydrate accumulations and the associated geology have been characterized over the past decade using conventional industry three-dimensional (3D) seismic data and dedicated logging-while-drilling (LWD) borehole data. To improve
Authors
Seth S. Haines, Patrick E. Hart, Timothy S. Collett, William Shedd, Matthew Frye, Paul Weimer, Ray Boswell
By
Energy Resources Program, Central Energy Resources Science Center

Missing link between the Hayward and Rodgers Creek faults

The next major earthquake to strike the ~7 million residents of the San Francisco Bay Area will most likely result from rupture of the Hayward or Rodgers Creek faults. Until now, the relationship between these two faults beneath San Pablo Bay has been a mystery. Detailed subsurface imaging provides definitive evidence of active faulting along the Hayward fault as it traverses San Pablo Bay and ben
Authors
Janet Watt, David A. Ponce, Thomas E. Parsons, Patrick E. Hart
By
Pacific Coastal and Marine Science Center

Subsea ice-bearing permafrost on the U.S. Beaufort Margin: 2. Borehole constraints

Borehole logging data from legacy wells directly constrain the contemporary distribution of subsea permafrost in the sedimentary section at discrete locations on the U.S. Beaufort Margin and complement recent regional analyses of exploration seismic data to delineate the permafrost's offshore extent. Most usable borehole data were acquired on a ∼500 km stretch of the margin and within 30 km of the
Authors
Carolyn D. Ruppel, Bruce M. Herman, Laura L. Brothers, Patrick E. Hart
By
Woods Hole Coastal and Marine Science Center
Subsea Permafrost and Associated Methane Hydrate on the U.S. Arctic Ocean Margin

Subsea Permafrost and Associated Methane Hydrate on the U.S. Arctic Ocean Margin

A new publication by USGS and BOEM provides the most complete information to date about the seaward extent of remaining subsea permafrost and possible...

Read Article

Science and Products

link
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, 3-D CT Core Imaging Laboratory, Core Preparation and Analysis Laboratory and Sample Repositories, Big Sur Landslides, Deep Sea Exploration, Mapping and Characterization, Subduction Zone Science
link

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
link
Image: Gas Hydrates Burning

U.S. Geological Survey Gas Hydrates Project

The USGS Gas Hydrates Project has been making contributions to advance understanding of US and international gas hydrates science for at least three decades. The research group working on gas hydrates at the USGS is among the largest in the US and has expertise in all the major geoscience disciplines, as well as in the physics and chemistry of gas hydrates, the geotechnical properties of hydrate...
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization
link

U.S. Geological Survey Gas Hydrates Project

The USGS Gas Hydrates Project has been making contributions to advance understanding of US and international gas hydrates science for at least three decades. The research group working on gas hydrates at the USGS is among the largest in the US and has expertise in all the major geoscience disciplines, as well as in the physics and chemistry of gas hydrates, the geotechnical properties of hydrate...
Learn More
Filter Total Items: 19

Island of Hawaii bird, mosquito, and avian malaria infection data 2001-2004

This data publication contains data files collected as part of a field, laboratory, and modeling effort aimed at uncovering ecological drivers of avian malaria transmission and impacts on Hawaiian honeycreepers across an elevational gradient on the eastern flank of Mauna Loa and Kilauea volcanoes on Hawaii Island. From 2001-2004, mosquito and bird data were collected at nine sites ranging 25 to 1,
By
Pacific Island Ecosystems Research Center

High-resolution multichannel sparker seismic-reflection and chirp sub-bottom data acquired along the Cascadia margin during USGS field activity 2019-024-FA

High-resolution multichannel sparker seismic (MCS) data and chirp sub-bottom data were collected by the U.S. Geological Survey in collaboration with the University of Washington (UW) in the summer of 2019 along the Cascadia submarine forearc offshore Oregon and Washington. Data were acquired to characterize quaternary deformation and sediment dynamics along the central and northern Cascadia margin
By
Pacific Coastal and Marine Science Center

Multichannel minisparker seismic-reflection data collected offshore Glacier Bay National Park during USGS field activity 2015-629-FA

Multichannel seismic reflection data were collected by the U.S. Geological Survey in May of 2015 outside of Palma Bay, Alaska. Seismic data were acquired coincidentally with high resolution bathymetry (Dartnell and others, 2022). Data were acquired to map the offshore extension of the Queen Charlotte-Fairweather Fault. The fault has produced several significant earthquakes during the last 150 year
By
Pacific Coastal and Marine Science Center

Hawaii Island forest bird movement data from 2014 to 2019

This data release includes data and metadata containing estimated and predicted locations of radio telemetered Hawaiian forest birds. Radio telemetry data was collected using an automated radio telemetry network from 2014 to 2019 from birds in two study sites, one a continuous forest and the other a fragmented forest. Four bird species that varied in age and sex were studied: the nectarivorous ʻiʻ
By
Pacific Island Ecosystems Research Center

Multichannel sparker and chirp seismic reflection data collected offshore South East Alaska during USGS Field Activity 2017-621-FA

High-resolution multichannel seismic reflection data and chirp sub-bottom data were collected by the U.S. Geological Survey in July and August 2017 offshore southeast Alaska to expand data coverage along the Queen Charlotte Fault system. Data were acquired to study earthquake hazards, fault mechanics and submarine mass wasting processes along the Queen Charlotte fault system, a 1200 km long transf
By
Pacific Coastal and Marine Science Center

Calibrated marine sparker source amplitude decay versus offset offshore Santa Cruz, California

This two-vessel survey was designed to quantify the decay of sound emitted from the SIG ELP790 minisparker (powered at 700 joules) and from the Applied Acoustics Delta Sparker (powered at 1.0 and 2.4 kilojoules) as a function of distance during marine geophysical surveys. Seven transect sites were surveyed at five different water depths (25, 50, 100, 200, and 600 meters) to compare the effects of
By
Pacific Coastal and Marine Science Center

Gridded Data from a 2011 Multibeam Bathymetric Survey of the Western Part of Passage Canal, Near Whittier, Alaska

This data release provides bathymetry data for the western part of Passage Canal, near Whittier Alaska. It was collected by the USGS Pacific Coastal and Marine Science Center in 2011 under Field Activity Number A0111GA. The data release consists of a 5 m grid, derived from processed and cleaned multibeam data. Depths were corrected for tidal variations and calculated using conductivity, temperatur
By
Alaska Science Center

High-resolution multi-channel and Chirp seismic-reflection data from USGS cruise 2018-641-FA collected in south-central California in support of the Bureau of Ocean Energy Management Cal DIG I offshore alternative energy project

This dataset is one of several collected as part of the Bureau of Ocean Energy Management (BOEM)-funded California Deepwater Investigations and Groundtruthing (Cal DIG I) project. The purpose of the study is to assess shallow geohazards, benthic habitats, and thereby the potential for alternative energy infrastructure (namely floating wind turbines) offshore south-central California due to its pro
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Multichannel minisparker, multichannel boomer, and chirp seismic-reflection data of USGS field activity 2017-612-FA collected in Puget Sound and Lake Washington in February of 2017

High-resolution multichannel minisparker, multichannel boomer and chirp seismic-reflection data were collected by the U.S. Geological Survey and the University of Washington in February of 2017 west of Seattle in Puget Sound and in Lake Washington, Washington. Data were collected aboard University of Washington's R/V Clifford A. Barnes during USGS field activity 2017-612-FA. Sub-bottom acoustic pe
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Chirp sub-bottom data of USGS field activity K0211PS collected in Puget Sound, Washington in April of 2011

High-resolution chirp sub-bottom data were collected by the U.S. Geological Survey in April 2011 south of Bainbridge Island and west of Seattle in Puget Sound, Washington. Data were collected aboard the R/V Karluk during field activity K0211PS using an Edgetech SB-512i sub-bottom profiler. Sub-bottom acoustic penetration spans several tens of meters and is variable by location.
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Chirp, multichannel minisparker, and boomer seismic-reflection data from USGS field activity G-01-13-GA collected in Port Valdez, Alaska, in September 2013

Multichannel minisparker and boomer seismic-reflection and chirp sub bottom data were collected by the U.S. Geological Survey in September of 2013 in Port Valdez, Alaska. Data were collected aboard the USGS R/V Alaskan Gyre during field activity G-01-13-GA. Sub-bottom acoustic penetration spans several hundreds of meters and is variable by location. High-resolution multichannel seismic-reflection
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Multichannel minisparker and chirp seismic reflection data of USGS field activity 2016-616-FA collected in the Catalina Basin offshore southern California in February 2016

This data release contains 25 multichannel minisparker seismic reflection (MCS) profiles and 41 chirp sub-bottom profiles that were collected in February of 2016 from the Catalina Basin offshore southern California by the U.S. Geological Survey Pacific and Coastal Marine Science Center in cooperation with the University of Washington. Data were collected aboard the University of Washington's R/V T
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

California State Waters Map Series: Offshore of Refugio Beach, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and visualization of swath sonar
By
Pacific Coastal and Marine Science Center

California State Waters Map Series: Offshore of Coal Oil Point, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and
By
Pacific Coastal and Marine Science Center

California State Waters Map Series: offshore of Santa Barbara, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and

By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

California State Waters Map Series: Offshore of Carpinteria, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and
By
Pacific Coastal and Marine Science Center

California State Waters Map Series — Offshore of Ventura, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and
By
Pacific Coastal and Marine Science Center

California State Waters Map Series: Offshore of Santa Barbara, California

In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and
By
Pacific Coastal and Marine Science Center
Two people maneuver big floats attached to hoses and equipment off the stern of a ship.
Components of oceanic seismic survey equipment
Components of oceanic seismic survey equipment
Two people maneuver big floats attached to hoses and equipment off the stern of a ship.

Components of oceanic seismic survey equipment

Components of oceanic seismic survey equipment

USGS technicians Eric Moore (left) and Jenny White deploy air guns (silver cylinders), compressor hose (black), and orange buoys at the start of a seismic survey to explore gas hydrates in the deepwater Gulf of Mexico.

By
Pacific Coastal and Marine Science Center
Two people maneuver big floats attached to hoses and equipment off the stern of a ship.

Components of oceanic seismic survey equipment

Components of oceanic seismic survey equipment

USGS technicians Eric Moore (left) and Jenny White deploy air guns (silver cylinders), compressor hose (black), and orange buoys at the start of a seismic survey to explore gas hydrates in the deepwater Gulf of Mexico.

By
Pacific Coastal and Marine Science Center
A crane removes a large metal container off of a ship sitting at the dock.
Craning off seismic equipment
Craning off seismic equipment
A crane removes a large metal container off of a ship sitting at the dock.

Craning off seismic equipment

Craning off seismic equipment

Seismic equipment is craned off research vessel Pelican at the dock in Cocodrie, Louisiana, after a 15-day expedition to explore gas hydrates in the deepwater Gulf of Mexico.

By
Pacific Coastal and Marine Science Center
A crane removes a large metal container off of a ship sitting at the dock.

Craning off seismic equipment

Craning off seismic equipment

Seismic equipment is craned off research vessel Pelican at the dock in Cocodrie, Louisiana, after a 15-day expedition to explore gas hydrates in the deepwater Gulf of Mexico.

By
Pacific Coastal and Marine Science Center
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Jenny White and Tom O'Brien prepare lead weight to be added for proper ballasting of the seismic streamer on the fantail of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Jenny White and Tom O'Brien prepare lead weight to be added for proper ballasting of the seismic streamer on the fantail of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Eric Moore, Wayne Baldwin, and Tom O'Brien ready the 72-channel digital streamer for deployment on the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Eric Moore, Wayne Baldwin, and Tom O'Brien ready the 72-channel digital streamer for deployment on the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Eric Moore and Jenny White deploy instruments at the start of a seismic survey to explore gas hydrates in the deepwater Gulf of Mexico from April to May 2013.

By
Energy and Minerals Mission Area, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technicians Eric Moore and Jenny White deploy instruments at the start of a seismic survey to explore gas hydrates in the deepwater Gulf of Mexico from April to May 2013.

By
Energy and Minerals Mission Area, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS co-chief scientist Seth Haines and technician Tom O’Brien work on data acquisition and analysis in the laboratory of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS co-chief scientist Seth Haines and technician Tom O’Brien work on data acquisition and analysis in the laboratory of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
2013 Gas Hydrate Expedition in Gulf of Mexico
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technician Jenny White and Ray Sliter check instruments on the fantail of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Image: 2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

2013 Gas Hydrate Expedition in Gulf of Mexico

USGS technician Jenny White and Ray Sliter check instruments on the fantail of the research vessel Pelican during a cruise to explore gas hydrates in the deepwater Gulf of Mexico from April to May, 2013.

By
Energy and Minerals, Communications and Publishing
Filter Total Items: 38

Categorizing active marine acoustic sources based on their potential to affect marine animals

Marine acoustic sources are widely used for geophysical imaging, oceanographic sensing, and communicating with and tracking objects or robotic vehicles in the water column. Under the U.S. Marine Mammal Protection Act and similar regulations in several other countries, the impact of controlled acoustic sources is assessed based on whether the sound levels received by marine mammals meet the criteri
Authors
Carolyn D. Ruppel, T.S. Weber, Erica Staaterman, Stanley Labak, Patrick E. Hart
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Gas hydrates on Alaskan marine margins

Gas hydrate distributions on the marine margins of the U.S. state of Alaska are more poorly known than those on other U.S. margins, where bottom simulating reflections have been systematically mapped on marine seismic data to support modern, quantitative assessments of gas-in-place in gas hydrates. The extent of bottom simulating reflections in the U.S. Beaufort Sea has been known since the late 1
Authors
Carolyn D. Ruppel, Patrick E. Hart
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Woods Hole Coastal and Marine Science Center, Deep Sea Exploration, Mapping and Characterization

Gas hydrate quantification in Walker Ridge block 313, Gulf of Mexico, from full-waveform inversion of ocean-bottom seismic data

The Gulf of Mexico (GOM) Joint Industry Project Leg 2 logging-while-drilling data in Walker Ridge lease block 313 (WR313) in the GOM detected gas hydrate in coarse- and fine-grained sediments at sites WR313-G and WR313-H. The coarse-grained units are thin (⁠<10  m⁠) and highly saturated, whereas the fine-grained unit is thick (approximately 200 m) with low saturation and fracture-filling gas hydra
Authors
Jiliang Wang, Priyank Jaiswal, Seth S. Haines, Yihong Yang, Patrick E. Hart
By
Energy Resources Program, Central Energy Resources Science Center, Pacific Coastal and Marine Science Center

Submarine landslide kinematics derived from high-resolution imaging in Port Valdez, Alaska

Submarine landslides caused by strong ground shaking during the M9.2 1964 Great Alaska earthquake generated a tsunami that destroyed much of the old town of Valdez, Alaska, and was responsible for 32 deaths at that location. We explore structural details of the 1964 landslide deposit, as well as landslide deposits from earlier events, in order to characterize kinematics of the landslide process. W
Authors
Emily Roland, Peter J. Haeussler, Thomas E. Parsons, Patrick E. Hart
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Alaska Science Center, Pacific Coastal and Marine Science Center

Measurement of sounds emitted by certain high-resolution geophysical survey systems

Scientific questions regarding the impact of anthropomorphic noise in the marine environment have resulted in an increasing number of regulatory requirements and precautionary mitigation strategies to reduce the risks associated with high-resolution marine geophysical surveys performed in waters subjected to government jurisdiction. An example of regulatory frameworks includes the Marine Mammal Pr
Authors
Steven E Crocker, Frank D Fratantonio, Patrick E. Hart, David S. Foster, Thomas F. O'Brien, Stanley Labak
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

Practical approaches to maximizing the resolution of sparker seismic reflection data

Sparkers are a type of sound source widely used by the marine seismic community to provide high-resolution imagery of the shallow sub-bottom (i.e., < 1000 m). Although sparkers are relatively simple, inexpensive, and high-frequency (100–2500 Hz) sources, they have several potential pitfalls due to their complicated and unpredictable signature. In this study we quantify the source characteristics o
Authors
Jared W. Kluesner, Daniel S. Brothers, Patrick E. Hart, Nathaniel C. Miller, Gerry Hatcher
By
National Innovation Center, Pacific Coastal and Marine Science Center

Controls on submarine canyon head evolution: Monterey Canyon, offshore central California

The Monterey submarine canyon, incised across the continental shelf in Monterey Bay, California, provides a record of the link between onshore tectonism, fluvial transport, and deep-marine deposition. High-resolution seismic-reflection imaging in Monterey Bay reveals an extensive paleocanyon unit buried below the seafloor of the continental shelf around Monterey and Soquel canyon heads. Paleocanyo
Authors
Katherine L. Maier, Samuel Y. Johnson, Patrick E. Hart
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Gas hydrate quantification using full-waveform inversion of sparse ocean-bottom seismic data: A case study from Green Canyon Block 955, Gulf of Mexico

We present a case study of gas hydrate quantification using dense short-offset multichannel seismic (MCS) and sparse long-offset ocean-bottom-seismometer (OBS) data in lease block Green Canyon 955 (GC955), Gulf of Mexico (GOM), where the presence of gas hydrate was interpreted using logging while drilling (LWD) data acquired by the GOM Gas Hydrate Joint Industry Project Leg II expedition. We use f
Authors
Jiliang Wang, Priyank Jaiswal, Seth S. Haines, Patrick E. Hart, Shiguo Wu
By
Energy Resources Program, Central Energy Resources Science Center

High-resolution seismic imaging of depositional characteristics at gas hydrate research sites in the Gulf of Mexico

No abstract available.
Authors
Seth S. Haines, Timothy S. Collett, Patrick E. Hart, B. Shedd, P. Weimer, M. Frye, R. Boswell
By
Energy Resources Program, Central Energy Resources Science Center

High-resolution seismic characterization of the gas and gas hydrate system at Green Canyon 955, Gulf of Mexico, USA

The Pliocene and Pleistocene sediments at lease block Green Canyon 955 (GC955) in the Gulf of Mexico include sand-rich strata with high saturations of gas hydrate; these gas hydrate accumulations and the associated geology have been characterized over the past decade using conventional industry three-dimensional (3D) seismic data and dedicated logging-while-drilling (LWD) borehole data. To improve
Authors
Seth S. Haines, Patrick E. Hart, Timothy S. Collett, William Shedd, Matthew Frye, Paul Weimer, Ray Boswell
By
Energy Resources Program, Central Energy Resources Science Center

Missing link between the Hayward and Rodgers Creek faults

The next major earthquake to strike the ~7 million residents of the San Francisco Bay Area will most likely result from rupture of the Hayward or Rodgers Creek faults. Until now, the relationship between these two faults beneath San Pablo Bay has been a mystery. Detailed subsurface imaging provides definitive evidence of active faulting along the Hayward fault as it traverses San Pablo Bay and ben
Authors
Janet Watt, David A. Ponce, Thomas E. Parsons, Patrick E. Hart
By
Pacific Coastal and Marine Science Center

Subsea ice-bearing permafrost on the U.S. Beaufort Margin: 2. Borehole constraints

Borehole logging data from legacy wells directly constrain the contemporary distribution of subsea permafrost in the sedimentary section at discrete locations on the U.S. Beaufort Margin and complement recent regional analyses of exploration seismic data to delineate the permafrost's offshore extent. Most usable borehole data were acquired on a ∼500 km stretch of the margin and within 30 km of the
Authors
Carolyn D. Ruppel, Bruce M. Herman, Laura L. Brothers, Patrick E. Hart
By
Woods Hole Coastal and Marine Science Center
Subsea Permafrost and Associated Methane Hydrate on the U.S. Arctic Ocean Margin

Subsea Permafrost and Associated Methane Hydrate on the U.S. Arctic Ocean Margin

A new publication by USGS and BOEM provides the most complete information to date about the seaward extent of remaining subsea permafrost and possible...

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