Better Performance and New Features on Earthquake Website
Better performance and new features: landslides and liquefaction estimates, population map layer, Spanish Did You Feel It?, and aftershock forecasts.Read More
Seismic Sensors Record a Hurricane’s Roar
Newly installed infrasound sensors at a Global Seismographic Network station on Puerto Rico recorded the sounds of Hurricane Maria passing overhead.Read Story
Near Realtime Maps of Possible Earthquake-Triggered Landslides
USGS scientists have been developing a system to quickly identify areas where landslides may have been triggered by a significant earthquake.Read Story
Mission Areas L2 Landing Page Tabs
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
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely science to assess ongoing hazards. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages...
Once the smoke clears from a wildfire, the danger is not over!! Other hazards, such as flash floods and debris flows, now become the focus. Areas recently burned by wildfires are particularly susceptible to flash floods and debris flows during rainstorms.
Estimates of the probability and volume of debris flows that may be produced by a storm in a recently burned area, using a model with characteristics related to basin shape, burn severity, soil properties, and rainfall.
Wildfire can significantly alter the hydrologic response of a watershed to the extent that even modest rainstorms can produce dangerous flash floods and debris flows....
Our Mission Statement
The mission of the Samples Repository (Buczkowski, 2018) is to
1. serve as the USGS repository for geological, biological, and geochemical samples collected through field research sponsored by the WHCMSC,
2. provide long-term storage of these samples collected by WHCMSC scientists and affiliated researchers under controlled conditions to ensure...
The USGS Woods Hole Coastal and Marine Science Center's Samples Repository is co-located on the Woods Hole Oceanographic Institution's Quissett Campus at 384 Woods Hole Road in Woods Hole, Massachusetts.
The K.O. Emery Geotechnical Wing serves as the primary storage location for all geological, biological, and geochemical samples collected through USGS research, or in the permanent...
Since 2002, the Woods Hole Coastal and Marine Science Center’s Samples Repository (WHCMSC) has been supporting research by providing secure storage for geological, biological, and geochemical samples; maintaining organization and an active inventory of these sample collections; as well as by providing access to these collections for study and reuse.
Over the years, local storage...
Obique photos offer a unique perspective of the coast. Features such as beach erosion or accretion, dune erosion and overwash can all be clearly characterized in this imagery. It also documents coastal infrastructure, as well as the damage that infrastructure may incur as the result of an impacting hurricane.
Multibeam and multichannel sparker seismic-reflection data between Cross Sound and Dixon Entrance, offshore southeastern Alaska, collected from 2016-05-17 to 2016-06-12 during field activity 2016-625-FA
Multibeam bathymetry and multichannel sparker seismic relfection data collected along the Queen Charlotte-Fairweather Fault between Icy Point and Dixon Entrance, offshore southeastern Alaska from 2016-05-17 to 2016-06-12.
Multichannel minisparker and chirp seismic-reflection data of field activity 2015-651-FA; Chatham Strait and Cross Sound, southeastern Alaska from 2015-08-03 to 2015-08-21
High-resolution multichannel minisparker and chirp seismic-reflection data were collected in August of 2015 to explore marine geologic hazards of inland waterways of southeastern Alaska. Sub-bottom profiles were acquired in the inland waters between Glacier Bay and Juneau, including Cross Sound and Chatham Strait.
Interpretive data release for Oregon Outer Continental Shelf Seafloor Mapping: Selected Lease Blocks Relevant to Renewable Energy
This data release includes the results of analysis of video data conducted by Oregon State University and the geo-habitat interpretation of multibeam echo sounder (MBES) data conducted by the USGS.
National Assessment of Shoreline Change: A GIS compilation of updated vector shorelines and associated shoreline change data for the north coast of Alaska, U.S. Canadian border to Icy Cape
This data release is an update to the original North Coast of Alaska data and includes revised rate-of-change calculations based on two additional shoreline positions data and improved rate metrics.
Interactive access to coastal change science and data for our Nation’s coasts. Information and products are organized within three coastal change hazard themes: 1) extreme storms, 2) shoreline change, and 3) sea-level rise. Each data item represents an individual research product, with some items grouped together as aggregates to show the breadth of the topic and make it easy to explore.
Data Release for USGS Field Activity 2014-607-FA--Oregon OCS Seafloor Mapping: Selected Lease Blocks Relevant to Renewable Energy
Data collected during 12-hour day operations in 2014, out of Charleston Harbor near Coos Bay, Oregon. The cruise plan consisted of 23 days on site split between sonar mapping and video ground truth surveying.
The Coastal Storm Modeling System (CoSMoS) makes detailed predictions of storm-induced coastal flooding, erosion, and cliff failures over large geographic scales. CoSMoS projections are currently available for the north-central coast (Half Moon Bay to Pt. Arena), San Francisco Bay, and southern California.
Planetary dune workshop expands to include subaqueous processes
Dune-like structures appear in the depths of Earth’s oceans, across its landscapes, and in the extremities of the solar system beyond. Dunes rise up under the thick dense atmosphere of Venus, and they have been found under the almost unimaginably ephemeral atmosphere of a comet.Titus, Timothy N.; Bryant, Gerald; Rubin, David M.
Seismic hazard, risk, and design for South America
We calculate seismic hazard, risk, and design criteria across South America using the latest data, models, and methods to support public officials, scientists, and engineers in earthquake risk mitigation efforts. Updated continental scale seismic hazard models are based on a new seismicity catalog, seismicity rate models, evaluation of earthquake...Petersen, Mark D.; Harmsen, Stephen; Jaiswal, Kishor; Rukstales, Kenneth S.; Luco, Nicolas; Haller, Kathleen; Mueller, Charles; Shumway, Allison
Variabilities in probabilistic seismic hazard maps for natural and induced seismicity in the central and eastern United States
Probabilistic seismic hazard analysis (PSHA) characterizes ground-motion hazard from earthquakes. Typically, the time horizon of a PSHA forecast is long, but in response to induced seismicity related to hydrocarbon development, the USGS developed one-year PSHA models. In this paper, we present a display of the variability in USGS hazard curves due...Mousavi, S. Mostafa; Beroza, Gregory C.; Hoover, Susan M.
Earthquake potential in California-Nevada implied by correlation of strain rate and seismicity
Rock mechanics studies and dynamic earthquake simulations show that patterns of seismicity evolve with time through (1) accumulation phase, (2) localization phase, and (3) rupture phase. We observe a similar pattern of changes in seismicity during the past century across California and Nevada. To quantify these changes, we correlate GPS strain...Zeng, Yuehua; Petersen, Mark D.; Shen, Zheng-Kang
Chirp subbottom profile data collected in 2015 from the northern Chandeleur Islands, Louisiana
As part of the Barrier Island Evolution Research project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a nearshore geophysical survey around the northern Chandeleur Islands, Louisiana, in September 2015. The objective of the project is to improve the understanding of barrier island...Forde, Arnell S.; DeWitt, Nancy T.; Fredericks, Jake J.; Miselis, Jennifer L.
Quaternary sediment thickness and bedrock topography of the glaciated United States east of the Rocky Mountains
Beginning roughly 2.6 million years ago, global climate entered a cooling phase known as the Pleistocene Epoch. As snow in northern latitudes compacted into ice several kilometers thick, it flowed as glaciers southward across the North American continent. These glaciers extended across the northern United States, dramatically altering the...Soller, David R.; Garrity, Christopher P.
Geoelectric hazard maps for the Mid-Atlantic United States: 100 year extreme values and the 1989 magnetic storm
Maps of extreme value geoelectric field amplitude are constructed for the Mid‐Atlantic United States, a region with high population density and critically important power grid infrastructure. Geoelectric field time series for the years 1983–2014 are estimated by convolving Earth surface impedances obtained from 61 magnetotelluric survey sites...Love, Jeffrey J.; Lucas, Greg M.; Kelbert, Anna; Bedrosian, Paul A.
Revised recommended methods for analyzing crater size-frequency distributions
Impact crater populations crucially help us to understand solar system dynamics, planetary surface histories, and surface modification processes. A single previous effort to standardize how crater data are displayed in graphs, tables, and archives, was in a 1978 NASA report by the Crater Analysis Techniques Working Group, published in 1979 in...Robbins, Stuart J.; Riggs, Jamie D.; Weaver, Brian P.; Bierhaus, Edward B.; Chapman, Clark R.; Kirchoff, Michelle R.; Singer, Kelsi N.; Gaddis, Lisa
Extreme-event geoelectric hazard maps: Chapter 9
Maps of geoelectric amplitude covering about half the continental United States are presented that will be exceeded, on average, once per century in response to an extreme-intensity geomagnetic disturbance. These maps are constructed using an empirical parameterization of induction: convolving latitude-dependent statistical maps of extreme-value...Love, Jeffrey J.; Bedrosian, Paul A.
Detecting geothermal anomalies and evaluating LST geothermal component by combining thermal remote sensing time series and land surface model data
This paper explores for the first time the possibilities to use two land surface temperature (LST) time series of different origins (geostationary Meteosat Second Generation satellite data and Noah land surface modelling, LSM), to detect geothermal anomalies and extract the geothermal component of LST, the LSTgt. We hypothesize that in geothermal...Romaguera, Mireia; Vaughan, R. Greg; Ettema, J.; Izquierdo-Verdiguier, E.; Hecker, C. A.; van der Meer, F.D.
The electric storm of November 1882
In November 1882, an intense magnetic storm related to a large sunspot group caused widespread interference to telegraph and telephone systems and provided spectacular and unusual auroral displays. The (ring current) storm time disturbance index for this storm reached maximum −Dst ≈ 386 nT, comparable to Halloween storm of 29–31...Love, Jeffrey J.
The size, distribution, and mobility of landslides caused by the 2015 Mw7.8 Gorkha earthquake, Nepal
Coseismic landslides pose immediate and prolonged hazards to mountainous communities, and provide a rare opportunity to study the effect of large earthquakes on erosion and sediment budgets. By mapping landslides using high-resolution satellite imagery, we find that the 25 April 2015 Mw7.8 Gorkha earthquake and aftershock sequence produced at...Roback, Kevin; Clark, Marin K.; West, A. Joshua; Zekkos, Dimitrios; Li, Gen; Gallen, Sean F.; Chamlagain, Deepak; Godt, Jonathan W.
This animated GIF shows a sequence of radar amplitude images that were acquired by the Agenzia Spaziale Italiana CosmoSkyMed satellite system. The images illustrate changes to the...
Hawaiian Volcano Observatory geologist Matt Patrick acquires video of fissure 8 and the lava channel from Pohoiki Road/Highway 132. The video is used to document fountain behavior and lava flow characteristics, and how they change with time.
Lava flows around islands in the lava channel. The direction of flow is from the upper right to lower left. Field crews can make a rough calculation of velocity by timing large blocks as they pass between two landmarks that are a known distance apart.
The USGS Pacific Coastal and Marine Science Center hosted two back-to-back subduction-zone workshops in Santa Cruz, California, from February 5–8, 2018.
False-alarm tsunami alerts across the U.S. East Coast, Gulf of Mexico, and Caribbean prompt calls to USGS
USGS research geologist Curt Storlazzi led a workshop on “Understanding Flooding on Reef-lined Island Coastlines” (UFORIC) in Honolulu, Hawaiʻi, from 5–7 February.
Imagine dragging your outstretched fingers through wet beach sand, leaving long grooves behind. Scientists recently discovered enormous grooves buried under the seafloor near Costa Rica. The detailed three-dimensional data they used to uncover these corrugations can help them better understand large subduction zone earthquakes and related tsunamis worldwide.
The USGS Gas Hydrates Project has published two new Fact Sheets. One describes the goals and scope of the Project and the other describes "Gas Hydrates in Nature," including where they form, how they are studied, and why researchers focus on gas hydrates for energy resource and environmental studies.
USGS 360-degree videos of king tides show how rising seas will transform California beaches in the future
Acting deputy director of the USGS Pacific Coastal and Marine Science Center Nadine Golden attended a workshop on restoring a sand-mining operation on California’s Monterey Bay.
One week ago, on January 23rd at 12:31 a.m. local time, Alaskans were rocked by a magnitude 7.9 earthquake, with an epicenter in the Gulf of Alaska, about 350 miles southwest of Anchorage, and about 175 miles southeast of Kodiak Island.
On January 17, 4th and 5th graders from De Laveaga Elementary School visited the USGS Pacific Coastal and Marine Science Center in Santa Cruz, California.
Days after fatal debris flows devastated Southern California’s Montecito community, a team of U.S. Geological Survey geologists joined county, state, and federal partners to survey and evaluate the aftermath.
CMGP Lidar Coordinator participating in National Elevation Assessments and Coordination session at 2018 ASPRS Annual Conference
Xan Fredericks, Lidar Coordinator for the Coastal and Marine Geology Program, will moderate and participate in the National Elevation Assessments and Coordination session at the 2018 American Society for Photogrammetry and Remote Sensing (ASPRS) Annual Conference.