Mission Areas

Natural Hazards

Mission Areas L2 Landing Page Tabs

Every year in the United States, natural hazards threaten lives and livelihoods and result in billions of dollars in damage. We work with many partners to monitor, assess, and conduct targeted research on a wide range of natural hazards so that policymakers and the public have the understanding they need to enhance preparedness, response, and resilience.

Reducing Risk

Reducing Risk

USGS scientists develop new products to make science available to the public, emergency managers, and decision-makers. These efforts increase public safety and reduce risk and economic losses caused by natural hazards.

Learn More

Hazard Research

Hazard Research

USGS scientists conduct research to understand earth processes and the natural hazards they can pose to society in order to increase public safety and reduce risk and economic loss.

Explore our Programs

Get Notified

You can subscribe to USGS Hazards Data

WaterAlert

Volcano Notification Service

Earthquakes Notification Service

News

Date published: November 9, 2018

USGS Working to Restore Streamgages

For questions about a streamgage in your state, please contact your local USGS water science center; contacts can be found at https://water.usgs.gov/key_officials.html.

Date published: October 18, 2018

Before and After: Coastal Change Caused by Hurricane Michael

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Michael, visit the USGS Hurricane Michael page at https://usgs.gov/hurricane-michael.

Date published: October 17, 2018

The Hayward Fault—Is It Due for a Repeat of the Powerful 1868 Earthquake?

By Thomas M. Brocher, Jack Boatwright, James J. Lienkaemper, Carol S. Prentice, David P. Schwartz, and Howard Bundock

Drawn from: USGS Fact Sheet 2018-3052

Costs and consequences of natural hazards can be enormous; each year more people and infrastructure are at risk. We develop and apply hazards science to help protect U.S. safety, security, and economic well being. These scientific observations, analyses, and research are crucial for the Nation to become more resilient to natural hazards.

Read Our Science Strategy
Filter Total Items: 268
Date published: November 13, 2018
Status: Active

Using Video Imagery to Study Wave Dynamics: Isla Verde

Four video cameras overlook the coast at Isla Verde in San Juan, Puerto Rico. Two of them focus on the shoreline: Camera 1 looks at the nearby beach and eastward along the shore, and Camera 2 looks farther away to the eastern end of the beach. The other two look out across the reefs: Camera 3 to the north-northwest, and Camera 4 to the northeast.

Date published: November 8, 2018
Status: Active

Environmental Geochemistry

Coastal Environmental Geochemistry research at the Woods Hole Coastal and Marine Science Center spans multiple ecosystems and topics, including coastal wetlands, aquifers, and estuaries, with the goal of providing data and guidance to federal, state, local, and private land owners and managers on these vital ecosystems.

 

Date published: November 8, 2018
Status: Active

Remote Sensing Coastal Change

We use remote-sensing technologies—such as aerial photography, satellite imagery, and lidar (laser-based surveying)—to measure coastal change along U.S. shorelines.

Date published: October 30, 2018
Status: Active

California Seafloor Mapping Program data collection

Here we describe the data collection methods and techniques of the California Seaflor Mapping Program: mapping, video and photography ground-truthing, and seismic profiling data collection.

Date published: October 30, 2018
Status: Active

California Seafloor Mapping Program map-set production

USGS and the California Ocean Protection Council (COPC) are supporting development of peer-reviewed map sets for California’s mainland State Waters.

Date published: October 27, 2018
Status: Active

Global Geoengineering Research: Methods of study

Field methods of study in global geoengineering research

Contacts: Robert Kayen
Date published: October 27, 2018
Status: Active

Global Geoengineering Research: Modeling

Prediction of the severity of ground failure in Quaternary deposits is a critical component of hazard studies. Model development in our project is focused on design and application of methods for quantitative assessment of ground deformation potential.

Contacts: Robert Kayen
Date published: October 27, 2018
Status: Active

Global Geoengineering Research

Ground Deformation and Failure

The Coastal and Marine Geology geotechnical group investigates the causes of ground deformation and ground failure as a result of earthquakes, storms, and wave action. The coastal urban regions of the Pacific margin of the United States are growing rapidly, putting increasing demands on coastal infrastructure and lifelines, such as...

Contacts: Robert Kayen
Date published: October 16, 2018
Status: Active

Submarine Groundwater Discharge

Submarine groundwater discharge (SGD) is an ubiquitous coastal process that is driven by a composite of climatologic, hydrogeologic, and oceanographic processes. For example, terrestrial hydraulic gradients that reflect both short and long term climatic conditions almost always transport both surface and ground water toward the coast. In coastal waters, physical oceanographic processes such as...

Date published: October 15, 2018
Status: Active

U.S. Geological Survey Gas Hydrates Project

The USGS Gas Hydrates Project focuses on the study of natural gas hydrates in deepwater marine systems and permafrost areas. The primary goals are:

  • Evaluate methane hydrates as a potential energy source
  • Investigate the interaction between methane hydrate destabilization and climate change at short and long time scales, particularly in the Arctic
  • Study the spatial
  • ...
Date published: October 9, 2018
Status: Completed

Science Posters

The USGS Pacific Coastal and Marine Science Center created posters about each of these completed research projects. Here, the posters are presented along with additional information.

Click the text to open a detailed page about the study.

Click the thumbnail image to open its full-size poster (PDF...

Date published: October 8, 2018
Status: Completed

Tsunami Generation from the 2004 M=9.1 Sumatra-Andaman Earthquake

The December 26, 2004 magnitude (M) 9.1 Sumatra-Andaman earthquake occurred along a tectonic subduction zone in which the India Plate, an oceanic plate, is being subducted beneath the Burma micro-plate, part of the larger Sunda plate. The boundary between the downgoing and overriding plates of the subduction zone is marked by the Sunda Trench above.

This page provides a brief overview...

Contacts: Eric Geist
Filter Total Items: 126
Date published: November 7, 2018

Dune Metrics for the Massachusetts Coast as Derived From 2013–14 Topographic Lidar Data

 This data release, which is part of the 2018 update, defines the position and elevation of the most seaward dune crest and toe along the Massachusetts coast as derived from 2013–14 lidar data. In the absence of a dune, the peak of the berm or the seaward edge of a bluff, headland, or hard structure (for example, a seawall, road, or parking lot) was chosen as a proxy for the dune crest. 

Date published: November 7, 2018

High-resolution geophysical data collected in Lake Powell, Utah-Arizona, U.S. Geological Survey Field Activity 2017-049-FA

High-resolution geophysical mapping of Lake Powell in the Glen Canyon National Recreation Area in Utah and Arizona was conducted between October 8 and November 15, 2017, as part of a collaborative effort between the U.S. Geological Survey and the Bureau of Reclamation to provide high-quality data needed to reassess the area-capacity tables for the Lake Powell reservoir.

Date published: November 7, 2018

Mean tidal range in marsh units of Assateague Island National Seashore and Chincoteague Bay, Maryland and Virginia

This dataset displays the spatial variation of mean tidal range (i.e. Mean Range of Tides, MN) in the Assateague Island National Seashore and Chincoteague Bay based on conceptual marsh units defined by Defne and Ganju (2018). MN was based on the calculated difference in height between mean high water (MHW) and mean low water (MLW) using the VDatum (v3.5) database (...

Date published: November 7, 2018

Unvegetated to vegetated marsh ratio in Assateague Island National Seashore and Chincoteague Bay, Maryland and Virginia

Unvegetated to vegetated marsh ratio (UVVR) in the Assateague Island National Seashore and Chincoteague Bay is computed based on conceptual marsh units. The response and resilience of coastal wetlands to physical factors need to be assessed in terms of the ensuing change to their vulnerability and ecosystem services.

Date published: November 7, 2018

Elevation of marsh units in Assateague Island National Seashore and Chincoteague Bay, Maryland and Virginia

Elevation distribution in the Assateague Island National Seashore (ASIS) salt marsh complex and Chincoteague Bay is given in terms of mean elevation of conceptual marsh units.  The response and resilience of coastal wetlands to physical factors need to be assessed in terms of the ensuing change to their vulnerability and ecosystem services.

Date published: November 7, 2018

Unvegetated to vegetated marsh ratio in Assateague Island National Seashore and Chincoteague Bay, Maryland and Virginia

Unvegetated to vegetated marsh ratio (UVVR) in the Assateague Island National Seashore and Chincoteague Bay is computed based on conceptual marsh units. The response and resilience of coastal wetlands to physical factors need to be assessed in terms of the ensuing change to their vulnerability and ecosystem services.

Date published: November 7, 2018

Conceptual marsh units for Assateague Island National Seashore and Chincoteague Bay, Maryland and Virginia

The salt marsh complex of Assateague Island National Seashore (ASIS) and Chincoteague Bay was delineated to smaller, conceptual marsh units by geoprocessing of surface elevation data. Flow accumulation based on the relative elevation of each location is used to determine the ridge lines that separate each marsh unit while the surface slope is used to automatically assign each unit a drainage...

Date published: October 25, 2018

Beach topography and nearshore bathymetry of northern Monterey Bay, California

This data release presents beach topography and nearshore bathymetry data from repeated surveys in northern Monterey Bay, California to document changes in shoreline position and coastal morphology as they relate to episodic (storms), seasonal, and interannual and longer processes. Since October 2014, semi-annual surveys have been performed in late summer (September or October...

Date published: October 11, 2018

Mean tidal range in marsh units of Plum Island Estuary and Parker River salt marsh complex, Massachusetts

This dataset displays the spatial variation of mean tidal range (i.e. Mean Range of Tides, MN) in the Plum Island Estuary and Parker River (PIEPR) salt marsh complex based on conceptual marsh units defined by Defne and Ganju (2018).  MN was based on the calculated difference in height between mean high water (MHW) and mean low water (MLW) using the VDatum (v3.5) database.

Date published: October 11, 2018

Unvegetated to vegetated marsh ratio in Plum Island Estuary and Parker River salt marsh complex, Massachusetts

Through scientific efforts initiated with the Hurricane Sandy Science Plan, the USGS has been expanding national assessment of coastal change hazards and forecast products to coastal wetlands, including the Plum Island Estuary and Parker River salt marsh complex, with the intent of providing Federal, State, and local managers tools to estimate the vulnerability and ecosystem service potential...

Date published: October 10, 2018

Elevation of marsh units in Plum Island Estuary and Parker River salt marsh complex, Massachusetts

This data release provides elevation distribution in the Plum Island Estuary and Parker River (PIEPR) salt marsh complex. Elevation distribution was calculated in terms of mean elevation of conceptual marsh units. The elevation data was based on the 1-meter gridded Digital Elevation Model and supplemented by 1-meter resampled 1/9 arc-second resolution National Elevation Data, where data gaps...

Date published: October 10, 2018

Conceptual marsh units for Plum Island Estuary and Parker River salt marsh complex, Massachusetts

The salt marsh complex of Plum Island Estuary and Parker River was delineated to smaller, conceptual marsh units by geoprocessing of surface elevation data. Flow accumulation based on the relative elevation of each location was used to determine the ridge lines that separate each marsh unit while the surface slope was used to automatically assign each unit a drainage point, where water drains...

Filter Total Items: 23
Date published: September 17, 2018

Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in Quadrangle 6 of the Stellwagen Bank National Marine Sanctuary Region offshore of Boston, Massachusetts

The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration's National Marine Sanctuary Program, has conducted seabed mapping and related research in the Stellwagen Bank National Marine Sanctuary (SBNMS) region since 1993.

Date published: April 16, 2018

Earthquake outlook for the San Francisco Bay region 2014–2043

Using information from recent earthquakes, improved mapping of active faults, and a new model for estimating earthquake probabilities, the 2014 Working Group on California Earthquake Probabilities updated the 30-year earthquake forecast for California. They concluded that there is a 72 percent probability (or likelihood) of at least one earthquake of magnitude 6.7 or greater striking somewhere in

Attribution: Natural Hazards
Date published: April 11, 2018

Digital database of recently active traces of the Hayward Fault, California

This map shows the location of and evidence for recent movement on active fault traces within the Hayward Fault Zone, California.

Attribution: Natural Hazards
Date published: April 11, 2018

HayWired aftershock (M> 5) ShakeMaps

The maps in this archive display estimated intensities and ground motions for the largest earthquakes in the HayWired aftershock sequence. The aftershock sequence follows the HayWired M7.0 mainshock that is imagined to occur on April 18, 2018 along the Hayward Fault.These maps have been used in analyses of the HayWired scenario.

Attribution: Natural Hazards
Date published: April 11, 2018

Ground motion and regional information of the M 7.0 mainshock

The HayWired scenario depicts a hypothetical M7.0 earthquake on California’s Hayward Fault. This site includes an interactive map showing fault traces and ShakeMap contours, information on the tectonic setting of the Hayward Fault and fault rupture history; and a USGS ShakeMap, which provides ground motion information for the HayWired scenario mainshock.

Attribution: Natural Hazards
Date published: March 23, 2018

The HayWired Scenario: An Urban Earthquake in a Connected World - A Geonarrative

What might it be like the next time the Hayward Fault has a large earthquake? A geonarrative and related imagery examines a hypothetical earthquake, the magnitude 7.0 HayWired earthquake scenario.

Date published: October 16, 2017

Regional Conductivity Maps

Location of 1D Earth Resistivity Models with respect to Physiographic Regions of the USA

Date published: May 26, 2017

Data from Earthquake-Induced Landslide Hazards for a M7.0 Scenario Earthquake on the Hayward Fault

The seismic-landslide probability map covers the counties of Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Santa Cruz, Solano, and Sonoma. The slope failures are triggered by a hypothetical earthquake with a moment magnitude of 7.0 occurring on April 18, 2018, at 4:18 p.m. on the Hayward Fault in the east bay part of California’s San Francisco Bay region.

Attribution: Natural Hazards
Date published: March 15, 2016

Map of America's Submerged Lands

Links to publications that contain maps of the sea floor or lake beds and the digital data used to create them.

Date published: March 7, 2016

Coastal and Marine Geology Program Interactive Maps

This portal is a “go to” source for maps related to ocean and coastal mapping. Information is organized by geography or region, by theme, and by the year data was published.

Date published: March 7, 2016

Interactive Flood Map

Maps of flood and high flow conditions within the U.S.

Date published: March 7, 2016

Observatories

Map of USGS Magnetic observatory locations.

Filter Total Items: 4,327
Year Published: 2018

Image mosaic and topographic maps of Mercury

Map DescriptionsSheet 1: This image mosaic is based on observations acquired by the Mercury Dual Imaging System (MDIS; Hawkins and others, 2009), an instrument on the National Aeronautics and Space Agency (NASA) MErcury Surface, Space ENvironment, Geochemistry, and Ranging (MESSENGER) spacecraft (Solomon and others, 2007). The Mercator projection...

Hunter, Marc A.; Hare, Trent M.; Hayward, Rosalyn K.; Chabot, Nancy L.; Hash, Christopher D.; Denevi, Brett W.; Ernst, Carolyn M.; Murchie, Scott L.; Blewett, David T.; Malaret, Erick R.; Solomon, Sean C.; Becker, Kris J.; Becker, Tammy L.; Weller, Lynn A.; Edmundson, Kenneth L.; Neuman, Gregory A.; Mazarico, Erwan; Perry, Mark E.
Hunter, M.A., Hare, T.M., Hayward, R.K., Chabot, N.L., Hash, C.D., Denevi, B.W., Ernst, C.M., Murchie, S.L., Blewett, D.T., Malaret, E.R., Solomon, S.C., Becker, K.J., Becker, T.L., Weller, L.A., Edmundson, K.L., Neuman, G.A., Mazarico, E., and Perry, M.E., 2018, Image mosaic and topographic maps of Mercury: U.S. Geological Survey Scientific Investigations Map 3404, scale 1:20,000,000 and 1:12,157,366, https://doi.org/10.3133/sim3404.

Year Published: 2018

Ground motions from the 7 and 19 September, 2017 Tehuantepec and Puebla-Morelos, Mexico, earthquakes

The 2017 M">M 8.2 Tehuantepec and M">M 7.1 Puebla‐Morelos earthquakes were deep inslab normal‐faulting events that caused significant damage to several central‐to‐southern regions of Mexico. Inslab earthquakes are an important component of seismicity and seismic hazard in Mexico. Ground‐motion prediction equations (GMPEs...

Sahakian, Valerie J.; Melgar, Diego; Quintanar, Luis; Ramirez-Guzman, Leonardo; Pérez-Campos, Xyoli; Baltay, Annemarie S.
Sahakian, V., D. Melgar, L. Quíntanar, L. Ramírez-Guzman, X. Pérez-Campos, A. Baltay, in press. Ground Motions from the 7 and 19 September Tehuantepec and Puebla-Morelos, Mexico Earthquakes, Bull. of the Seis. Soc. of Am., https://doi.org/10.1785/0120180108

Year Published: 2018

Tropical storm-induced landslide potential using combined field monitoring and numerical modeling

When heavy rainfall, such as that associated with tropical storms, falls on steep hillsides, shallow landslides are often one of the damaging consequences. To assess landslide potential from heavy rainfall, a strategy of combined numerical simulation and field monitoring of variably saturated hillslope conditions is developed. To test the combined...

Chen, Pan; Lu, Ning; Formetta, Giuseppe; Godt, Jonathan W.; Wayllace, Alexandra
Attribution: Natural Hazards
Chen, P., Lu, N., Formetta, G., Godt, J.W., and Wayllace, A., 2018, Tropical storm-induced landslide potential using combined field monitoring and numerical modeling: Journal or Geotechnical and Geoenvironmental Engineering, v. 144, p. 05018002-1-12.

Year Published: 2018

Climate dictates magnitude of asymmetry in soil depth and hillslope gradient

Hillslope asymmetry is often attributed to differential eco‐hydro‐geomorphic processes resulting from aspect‐related differences in insolation. At midlatitudes, polar facing hillslopes are steeper, wetter, have denser vegetation, and deeper soils than their equatorial facing counterparts. We propose that at regional scales, the magnitude in...

Inbar, Assaf; Nyman, Petter; Rengers, Francis K.; Lane, Patrick N. J.; Sheridan, Gary J.

Year Published: 2018

Mars global digital dune database (MGD3)—Composition, stability, and thermal inertia

The Mars Global Digital Dune Database (MGD3) is an online repository that has catalogued dune fields larger than 1 km2 located between latitudes 90° N. and 90° S. The work presented here expands upon previous MGD3 open-file reports, with a new emphasis upon characterizing dune fields through composition, stability, and thermal inertia. Included in...

Gullikson, Amber L.; Hayward, Rosalyn K.; Titus, Timothy N.; Charles, Heather; Fenton, Lori K.; Hoover, Rachael H.; Putzig, Nathaniel E.
Gullikson, A.L., Hayward, R.K., Titus, T.N., Charles, H., Fenton, L.K., Hoover, R., and Putzig, N.E., 2018, Mars global digital dune database (MGD3)—Composition, stability, and thermal inertia: U.S. Geological Survey Open-File Report 2018–1164, 17 p., https://doi.org/10.3133/ofr20181164.

Year Published: 2018

Development of a geodetic component for the U.S. West Coast Earthquake Early Warning System

An earthquake early warning (EEW) system, ShakeAlert, is under development for the West Coast of the United States. This system currently uses the first few seconds of waveforms recorded by seismic instrumentation to rapidly characterize earthquake magnitude, location, and origin time; ShakeAlert recently added a seismic line source algorithm. For...

Murray, Jessica R.; Crowell, Brendan W.; Grapenthin, R.; Hodgkinson, Kathleen; Langbein, John O.; Melbourne, Timothy; Melgar, Diego; Minson, Sarah E.; Schmidt, David A.
Murray, J. R., B. W. Crowell, R. Grapenthin, K. Hodgkinson, J. O. Langbein, T. Melbourne, D. Melgar, S. E. Minson, and D. A. Schmidt (2018). Development of a Geodetic Component for the U. S. West Coast Earthquake Early Warning System, Seismol. Res. Lett.

Year Published: 2018

Reported investments in earthquake mitigation top $73 to $80 billion in the San Francisco Bay Area, California, since the 1989 Loma Prieta earthquake

The purpose of this report is to provide a compilation of structural retrofits and replacements of older buildings and infrastructure in the San Francisco Bay Area that have either been completed since 1989 or that are in progress as of October 2018. For the purposes of this report, all or parts of nine Bay Area counties were included:...

Brocher, Thomas M.; Gefeke, Kerri; Boatwright, John; Knudsen, Keith L.
Brocher, T.M., Gefeke, K., Boatwright, J., and Knudsen, K.L., 2018, Reported investments in earthquake mitigation top \$73 to \$80 billion in the San Francisco Bay Area, California, since the 1989 Loma Prieta earthquake: U.S. Geological Survey Open-File Report 2018–1168, 18 p., https://doi.org/10.3133/ofr20181168.

Year Published: 2018

Erratum to The 2013–2016 induced earthquakes in Harper and Sumner Counties, southern Kansas

The authors identified two sets of minor errors in the paper by Rubinstein et al. (2018), which are corrected here.

Rubinstein, Justin L.; Ellsworth, William L.; Dougherty, Sara L.

Year Published: 2018

Interseismic ground deformation and fault slip rates in the greater San Francisco Bay Area from two decades of space geodetic data

The detailed spatial variations of strain accumulation and creep on major faults in the northern San Francisco Bay Area (North Bay), which are important for seismic potential and evaluation of natural hazards, remain poorly understood. Here we combine interferometric synthetic aperture radar data from the ERS‐1/2 and Envisat satellites between...

Wu, Songbo; Nadeau, Robert; Ding, Xiaoling; Xu, Wenbin; Wu, Songbo; Materna, Kathryn; Nadeau, Robert; Floyd, Michael; Funning, Gareth J.; Chaussard, Estelle; Johnson, Christopher W.; Murray, Jessica R.; Ding, Xiaoling; Burgmann, Roland
Xu, W., S. Wu, K. Materna, R. Nadeau, M. Floyd, G. Funning, E. Chaussard, C. Johnson, J. R. Murray, X. Ding, and R. Bürgmann (2018), Interseismic ground deformation and fault slip rates in the greater San Francisco Bay Area from two decades of space geodetic data, J. Geophys. Res.

Year Published: 2018

Improving earthquake rupture forecasts using California as a guide

This article discusses ways in which earthquake rupture forecast models might be improved. Because changes are most easily described in the context of specific models, the third Uniform California Earthquake Rupture Forecast (UCERF3) and its presumed successor, UCERF4, is used as a basis for discussion. Virtually all of the issues and possible...

Field, Edward H.
Field, E. H. (2018). Improving Earthquake Rupture Forecasts Using California as a Guide, Seismological Research Letters, https://doi.org/10.1785/0220180151.

Year Published: 2018

VS30 at three strong-motion recording stations in Napa and Solano Counties, California—Lovall Valley Road, Broadway Street and Sereno Drive in Vallejo, and Vallejo Fire Station—Calculations determined from S-wave refraction tomography and multichannel analysis of surface waves (Rayleigh and Love)

The August 24, 2014, moment magnitude (Mw) 6.0 South Napa earthquake caused an estimated $400 million in structural damage to the City of Napa, California. In 2015, we acquired high-resolution P- and S-wave seismic data near three strong-motion recording stations in Napa and Solano Counties where high peak ground accelerations (PGAs) were recorded...

Chan, Joanne H.; Catchings, Rufus D.; Goldman, Mark R.; Criley, Coyn J.
Chan, J.H., Catchings, R.D., Goldman, M.R., and Criley, C.J., 2018, VS30 at three strong-motion recording stations in Napa and Solano Counties, California—Lovall Valley Road, Broadway Street and Sereno Drive in Vallejo, and Vallejo Fire Station—Calculations determined from S-wave refraction tomography and multichannel analysis of surface waves (Rayleigh and Love): U.S. Geological Survey Open-File Report 2018–1162, 62 p., https://doi.org/10.3133/ofr20181162.

Year Published: 2018

VS30 at three strong-motion recording stations in Napa and Napa County, California—Main Street in downtown Napa, Napa fire station number 3, and Kreuzer Lane—Calculations determined from s-wave refraction tomography and multichannel analysis of surface waves (Rayleigh and Love)

The August 24, 2014, moment magnitude (Mw) 6.0 South Napa earthquake caused an estimated $400 million in structural damage to the City of Napa, California. In 2015, we acquired high-resolution P- and S-wave seismic data near three strong-motion recording stations in Napa County where high peak ground accelerations (PGAs) were recorded during the...

Chan, Joanne H.; Catchings, Rufus D.; Goldman, Mark R.; Criley, Coyn J.
Chan, J.H., Catchings, R.D., Goldman, M.R., and Criley, C.J., 2018, VS30 at three strong-motion recording stations in Napa and Napa County, California—Main Street in downtown Napa, Napa fire station number 3, and Kreuzer Lane—Calculations determined from s-wave refraction tomography and multichannel analysis of surface waves (Rayleigh and Love): U.S. Geological Survey Open-File Report 2018–1161, 47 p., https://doi.org/10.3133/ofr20181161.

Filter Total Items: 9
Date published: August 23, 2018

SEA-MAT: Matlab Tools for Oceanographic Analysis

A collaborative effort to organize and distribute Matlab tools for the Oceanographic Community

Date published: August 13, 2018

bi-transect-extractor

This package is used to calculate coastal geomorphology variables along shore-normal transects. The calculated variables are used as inputs for modeling geomorphology using a Bayesian Network (BN). 

Date published: June 25, 2018

iPlover

iPlover was developed by the U.S. Geological Survey Woods Hole Coastal and Marine Science Center and the USGS Center for Integrated Data Analytics.  It is used by trained and vetted personnel to record information about habitats on coastal beaches and he environment surrounding them. 

Date published: February 28, 2018

THRESH

Software for tracking rainfall thresholds for landslide and debris-flow occurrence, user manual.

Date published: April 10, 2015

Scoops3D

Scoops3D is software to analyze three-dimensional slope stability throughout a digital landscape.

Date published: November 12, 2014

SLAMMER

SLAMMER is a Java program that facilitates performing a variety of sliding-block analyses to evaluate seismic slope performance.

Date published: October 20, 2009

TRIGRS

A Fortran Program for Transient Rainfall Infiltration and Grid-Based Regional Slope-Stability Analysis, Version 2.0.

Date published: June 18, 2001

PTCOUNT

A Fortran-77 Computer Program to Calculate the Areal Distribution of Mapped Data Points Using Count-Circle Methodology.

Date published: April 4, 2000

JanbuGS, BishopGS, and FelleniusGS

Fortran-77 programs for limit-equilibrium slope-stability analysis.

Filter Total Items: 2,532
Image showing example of seafloor images and deployment of the SEABOSS sampler.
December 31, 2018

SEABOSS Collage

SEABed Observation and Sampling System (SEABOSS) (center image) and the MiniSEABOSS (right) designed for rapid, inexpensive, and effective collection of seabed imagery (photographs and video) as well sediment samples from the coastal/inner-continental shelf regions.  Images from coastal Massachusetts show purple algae-encrusted cobbles and boulders covered with sea-stars (

...
city skyline at night with tall buildings and bridge in left foreground lit up
December 31, 2018

The Bay Bridge and the Oakland city skyline

The nighttime Oakland city skyline as seen from San Francisco with the Bay Bridge in the foreground

Image showing seafloor topography, water column image of methane plume, and seismic data.
December 31, 2018

Water Column and Seismic collage

3D Image of a multi-channel seismic (MCS) line showing gas (blue/green) migrating up through fractures in the subsurface, culminating in a 600 meter tall plume of methane gas in the water column that was captured using a Simrad EK60 split beam echo sounder.  Background bathymetry was downloaded from USGS Open-File Report 2012-1266 (

...
 Three-dimensional model of Chimney Bluffs, New York along Lake Ontario
December 31, 2018

Three-dimensional model of Chimney Bluffs, New York along Lake Ontari

Three-dimensional model of Chimney Bluffs, New York along Lake Ontario created from low-altitude digital images collected from an unmanned aerial system (UAS).

Web browser screen showing an application with different parameters and controls on left and the resulting map on right.
December 31, 2018

Screenshot of Our Coast, Our Future

Screenshot of Our Coast, Our Future (OCOF) interactive map view of Stinson Beach, California, showing extent of flooding predicted if subjected to a sea-level rise of 100 centimeters (about 40 inches) and elevated water levels caused by a 100-year storm.

Displaying fixed bin options for rates of change
December 31, 2018

Displaying fixed bin options for rates of change

Displaying fixed bin options (left) for rates of change for an example dataset (LRR, EPR, WLR), and scaled to data (right) (NSM).

Piping Plover habitat on Cedar Island shown here off of the DelMarVa Peninsula.
December 31, 2018

Piping Plover Habitat, Cedar Island

The beach-dependent shorebirds project at the Woods Hole Coastal and Marine Science Center models current and future habitat availability for nesting shorebirds in an effort to map current and likely future habitat availability on a range of sites along the U.S. Atlantic coast. Sites include beaches with minimal human-presence, such Cedar Island shown here off of the

...
Data visualization with scaled options applied
December 31, 2018

Data visualization with scaled options applied

Data visualization with (A) fixed and (B) scaled options applied. Examples of NSM and SCE are also displayed (C and D respectively). The data itself has not changed – only the scaling and statistic selected through the DSAS Data Visualization tool.

Image showing the deployment of seismic equipment from a research vessel, examples of seismic data, and examples of seismic
December 31, 2018

Seismic Collage

Image showing a collage of examples of multi-channel and single-channel seismic data collected by the USGS, seismic equipment deployed from a research vessel, and seismic equipment on a research vessel.  These data are critical to the CMG Program as they define the geology in marine and coastal environments.

Example of a section of DSAS summary report highlighting the use of DSAS_group to organize output statistics.
December 31, 2018

DSAS Summary Report

 Example of a section of DSAS summary report highlighting the use of DSAS_group to organize output statistics.

Meagan Gonneea checks on instruments at a tidal creek in Great Pond, Falmouth, MA
November 8, 2018

Instrument check at a tidal creek, Falmouth, MA

Meagan Gonneea checks on instruments at a tidal creek in Great Pond, Falmouth, MA. Daily tides drive exchange between coastal wetlands and adjacent estuaries. Here we have instrumented a tidal channel to measure those fluxes over a tidal cycle. When the marsh floods, material is imported from the estuary. Biogeochemical cycles within the wetland, driven by plants and

...
Dark image of a coastal area shows standard deviation of pixel density for 10 minutes, brighter areas mean more movement.
November 8, 2018

Sunset State Beach variance image

Image from video camera along Sunset State Beach in Watsonville, CA, looking northwest. Every half hour during daylight hours, the camera shoots video for 10 minutes. This variance image shows the standard deviation of pixel intensity throughout the video frames, useful for determining how much variation or movement is occurring at a given location. Brighter tones indicate

...
Filter Total Items: 380
Date published: November 9, 2018

USGS Working to Restore Streamgages

For questions about a streamgage in your state, please contact your local USGS water science center; contacts can be found at https://water.usgs.gov/key_officials.html.

Date published: October 18, 2018

Before and After: Coastal Change Caused by Hurricane Michael

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Michael, visit the USGS Hurricane Michael page at https://usgs.gov/hurricane-michael.

Date published: October 17, 2018

The Hayward Fault—Is It Due for a Repeat of the Powerful 1868 Earthquake?

By Thomas M. Brocher, Jack Boatwright, James J. Lienkaemper, Carol S. Prentice, David P. Schwartz, and Howard Bundock

Drawn from: USGS Fact Sheet 2018-3052

Date published: October 16, 2018

The Great ShakeOut! -- 2018 Edition

Do you know what to do the moment the ground starts shaking? Drop, Cover, and Hold On!

Date published: October 15, 2018

GeoGirls Rock! USGS women encourage and support the next generation of scientists

Mount St. Helens volcano loomed in the distance as 25 middle-school “GeoGirls” signed in, received a name tag, dropped their overnight gear and gathered in a grassy open space to meet camp staff, women scientists and volunteers.

Date published: October 10, 2018

USGS scientists provide input for workshop on scientific drilling targets in the north Pacific Ocean

Pacific Coastal and Marine Science Center research geologist Danny Brothers attended the International Ocean Discovery Program (IODP) workshop on the “Scientific Exploration of the Arctic and North Pacific” September 25–27 in Mt. Hood, Oregon.

Date published: October 9, 2018

USGS: Hurricane surge likely to erode 75% of Florida Panhandle beaches

One-fourth of beachfront could be inundated by large storm waves, experts predict

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Michael, visit the USGS Hurricane Michael page at usgs.gov/hurricane-michael.

Date published: October 9, 2018

USGS: Hurricane surge likely to erode 75% of Florida Panhandle beaches

One-fourth of Florida Panhandle beachfront could be inundated by large storm waves, experts predict

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Michael, visit the USGS Hurricane Michael page at https://usgs.gov/hurricane-michael

 

Date published: October 5, 2018

Large underwater experiment in Monterey Canyon shows turbidity currents involve seafloor movement

Large underwater experiment in California’s Monterey Canyon shows that “turbidity currents” are not just currents, but involve movement of the seafloor itself

Date published: September 28, 2018

Magnitude 7.5 Earthquake near Palu, Indonesia

A magnitude 7.5 earthquake struck north of Palu, Indonesia on September 28, 2018 at 6:03 pm local time (10:03 am UTC).

Date published: September 20, 2018

Seismic Research Cruise Provides New Data on U.S. Atlantic Margin Gas Hydrates

Data acquired by the U.S. Geological Survey on the U.S. Atlantic Margin in August 2018 reveal new information about the distribution of gas hydrates in the sector stretching from the upper continental slope to deep water areas offshore New Jersey to North Carolina.

Filter Total Items: 177