USGS announces awards for 2018 earthquake monitoring and research
The U.S Geological Survey announces that the agency has awarded more than $20 million in 2018 for earthquake monitoring and applied research.Read Story
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
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
Geophysical imaging relies on specialized tools to detect anomalies in the water column or to map features on or beneath the seafloor. Equipment may be towed, mounted on the side of a ship, or attached to the ship’s hull. Many geophysical techniques rely on transmitting an acoustic signal of a particular frequency and analyzing the information in the returning signal to infer the properties...
Cold seeps are locations where chemicals, including methane, hydrocarbons, sulfide and sometimes carbon dioxide, leak from sediments below the seafloor into the water above. Much of the current knowledge on cold seeps comes from direct observations, such as the mapping of acoustic flares and the detection of...
Cold seeps, which are locations where chemicals -- including methane and other hydrocarbons, brine, hydrogen sulfide, and sometimes carbon dioxide--leak from the seafloor, occur worldwide on both passive and tectonically-active continental margins. Cold seeps are distinguished from ...
From May 3 to May 11, 2017, the U.S. Geological Survey, in collaboration with the British Geological Survey and with support from these two agencies, the National Oceanic and Atmospheric Administration (NOAA) Office of Ocean Exploration and Research, and the U.S. Department of Energy, will lead an...
Landslide Susceptibility Data and Maps provide tools for hazard assessment prior to an event that may cause landslides.
The Instrumented Pressure Testing Chamber (IPTC)
A device for measuring the physical properties of naturally-occurring, hydrate-bearing sediment at nearly in situ pressure conditions.
USGS scientists have a long tradition of studying submarine slope failures and were among the first to note a spatial link between slope failures and gas hydrates/gas-charged sediments. USGS Gas Hydrates scientists support the USGS Hazards Mission area through field-based surveys that refine understanding of this association and through geotechnical studies that evaluate the response of...
Analysis of 94,000 square kilometers of multibeam water column backscatter data collected by the NOAA Okeanos Explorer mostly seaward of the shelf-break on the northern US Atlantic margin reveals more than 570 gas plumes that correspond to seafloor methane seeps. This discovery is documented in an August 2014 ...
Puerto Rico and the Virgin Islands are located at an active plate boundary between the North American plate and the northeast corner of the Caribbean plate. Plate movements have caused large magnitude earthquakes and devastating tsunamis, but scientists have so far failed to explain the deformation of this complex region in a coherent and predictable picture, and this has hampered their...
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.
Aerial imagery and photogrammetric products from unmanned aerial systems (UAS) flights over the Lake Ontario shoreline at Sodus Bay, New York, July 12 to 14, 2017
This data release includes images tagged with locations determined from the UAS GPS; tables with updated estimates of camera positions and attitudes based on the photogrammetric reconstruction; tables listing locations of the base stations, ground control points, and transect points; geolocated, RGB-colored point clouds; orthomosaic images; and digital elevation models for each of the regions...
Our Coast, Our Future (OCOF) is a collaborative, user-driven project focused on providing California coastal resource managers and planners locally relevant, online maps and tools to help understand, visualize, and anticipate vulnerabilities to sea level rise and storms.
Sea-Floor Sediment Samples, Seabed Imagery, and CTD Instrument Data Collected on Stellwagen Bank in August 2017, U.S. Geological Survey Field Activity 2017-043-FA
The data collected in this study will aid research on the ecology of fish and invertebrate species that inhabit the region. On August 22 and 23, 2017, the U.S. Geological Survey, in collaboration with the Stellwagen Bank National Marine Sanctuary, conducted a research cruise aboard the Sanctuary’s Research Vessel Auk, visiting 39 locations within the sanctuary.
Seismic reflection and sample data collected offshore of Fire Island, New York in 2014, U.S. Geological Field Activity 2014-009-FA
The U.S. Geological Survey (USGS) conducted a geophysical and sampling survey in October 2014 that focused on a series of shoreface-attached ridges offshore of western Fire Island, NY. Seismic-reflection data, surficial grab samples and bottom photographs and video were collected along the lower shoreface and inner continental shelf to assess the impact of Hurricane Sandy on the coastal region...
The maps in this archive display estimated intensities and ground motions for the earthquake scenarios - events on faults that have ruptured in the past or have a likelihood of rupturing in the future. These maps are typically used for emergency response exercises and planning as well as for understanding the potential consequences of future large earthquakes.
How do we get ready for big earthquakes in populated areas? An important first step is to learn what a big earthquake could be like. These pages summarize the main patterns — the earthquake effects that show up again and again. Here, urban is shorthand for “cities, towns, and suburbs”.
The Massachusetts Office of Coastal Zone Management (CZM) launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the Massachusetts coast. This update included a marsh shoreline, which was defined to be the tonal difference between low- and high-marsh seen in ortho-photos. Further cooperation between CZM and the U.S. Geological Survey (USGS) has resulted in another...
Collection, analysis, and age-dating of sediment cores from salt marshes on the south shore of Cape Cod, Massachusetts, from 2013 through 2014
Elevation of the marsh surface was measured with RTK-GPS to evaluate where the marsh falls within the current tidal frame. The historic marsh surface elevation was then reconstructed using the calculated age of each depth interval and its elevation, assuming that elevations within this shallow zone (less than 30 cm) have been preserved for the past century.
Oceanographic time-series measurements made by the U.S. Geological Survey between 1975 and the present as part of research programs. The data were collected to address specific research questions and were primarily collected over durations less than a year, using stationary platforms, with sensors near the sea floor. These data have been used to study of ocean dynamics and to validate ocean...
Welcome to the CMGP Internet Map Server, an internet map server and downloadable list of GIS data being served by the USGS, Coastal and Marine Geology Program.
We conduct post-fire debris-flow hazard assessments for select fires in the Western U.S. We use geospatial data related to basin morphometry, burn severity, soil properties, and rainfall characteristics to estimate the probability and volume of debris flows that may occur in response to a design storm.
The Planetary Geologic Mapping Program serves the international science community through the production of high-quality and refereed geologic maps of planetary bodies. This program is in coordination between NASA science programs and the USGS Astrogeology Science Center.
Map showing recent (1997-98 El Niño) and historical landslides, Crow Creek and vicinity, Alameda and Contra Costa Counties, California
By Jeffrey A. Coe,1 Jonathan W. Godt,1 and Pierre Tachker2
1 U.S. Geological Survey, Denver Federal Center, MS 966, Denver, CO 80225
2 Institut Des Sciences Et Techniques De Grenoble, Département Géotechnique, Grenoble, France
Debris-Flow and Flooding Deposits in Coastal Venezuela Associated with the Storm of December 14–16, 1999
By Gerald F. Wieczorek, Matthew C. Larsen, L. Scott Eaton, Benjamin A. Morgan, and J. Luke Blair
Heavy rainfall from the storm of December 14–16, 1999, triggered thousands of shallow landslides on steep slopes of the Sierra de Avila north of Caracas, Venezuela, and caused flooding and massive debris flows in the channels of major drainages that severely damaged coastal communities.
Debris Flows Triggered by the El Niño Rainstorm of February 2-3, 1998, Walpert Ridge and Vicinity, Alameda County, California
By Jeffrey A. Coe and Jonathan W. Godt
Map Showing Inventory and Regional Susceptibility for Holocene Debris Flows, and Related Fast-Moving Landslides in the Conterminous United States
By Earl E. Brabb, Joseph P. Colgan, and Timothy C. Best1999
Maps showing locations of damaging landslides caused by El Niño rainstorms, winter season 1997-98, San Francisco Bay region, California
Jonathan W. Godt, Editor.
Pamphlet to accompany Miscellaneous Field Studies Maps MF-2325-A-J
By Robert W. Fleming and Rex L. Baum, U.S. Geological Survey, and Marco Giardino, Consiglio Nazionale Delle Ricerche, Italy
This map and the original delineate areas where large numbers of landslides have occurred and areas which are susceptible to landsliding in the conterminous United States.
Modeling the Holocene slip history of the Wasatch fault (Utah): Coseismic and postseismic Coulomb stress changes and implications for paleoseismicity and seismic hazard
The Wasatch fault zone defines the eastern boundary of the actively extending Basin and Range Province (Utah, western United States) and poses a significant seismic hazard to the metropolitan areas along the Wasatch Range. A wealth of paleoseismological data documents ∼24 surface-rupturing Mw ≥ 7 earthquakes along the Wasatch fault during the past...Bagge, Meike; Hampel andrea; Gold, Ryan D.
Slab2, a comprehensive subduction zone geometry model
Subduction zones are home to the most seismically active faults on the planet. The shallow megathrust interfaces of subduction zones host our largest earthquakes and are likely the only faults capable of magnitude 9+ ruptures. Despite these facts, our knowledge of subduction zone geometry—which likely plays a key role in determining the spatial...Hayes, Gavin; Moore, Ginevra; Portner, Daniel E.; Hearne, Mike; Flamme, Hanna E.; Furtney, Maria; Smoczyk, Gregory M.
The case for mean rupture distance in ground‐motion estimation
This article advocates for the use of mean rupture distances that we contend are more physically representative of the distance to an earthquake and are simpler than minimum distances. Many current ground‐motion models (GMMs) rely on numerous modifications of minimum rupture distances to accurately model near‐source ground motions. These...Thompson, Eric M.; Baltay, Annemarie S.
Broadband synthetic seismograms for magnitude 9 earthquakes on the Cascadia Megathrust based on 3D simulations and stochastic synthetics, Part 2: Rupture parameters and variability
We used a combination of 3D finite‐difference simulations (<1  Hz"><1 Hz) and 1D stochastic synthetics (>1  Hz">>1 Hz) to generate broadband (0–10 Hz) synthetic seismograms for numerous Mw">Mw 9 earthquake rupture scenarios on the Cascadia megathrust. Slip...Wirth, Erin A.; Frankel, Arthur; Marafi, Nasser A.; Vidale, John E.; Stephenson, William J.
Granite IP network default route disappearance—Diagnosis and solution
The U.S. Geological Survey (USGS) National Strong Motion Project (NSMP) operates numerous strong-motion seismographs to monitor ground shaking and structural response caused by large, nearby earthquakes. This report describes a problem NSMP scientists encountered communicating over the Internet with several Kinemetrics, Inc., Granite strong-motion...Baker, Lawrence M.
Seismic sensors record a hurricane’s roar
The instruments installed at Global Seismographic Network (GSN) stations were designed to record Earth’s vibrations, but they sometimes pick up sound waves from unexpected sources. For example, newly installed infrasound sensors at a station on Puerto Rico recorded the passage of Hurricane Maria on 20 September 2017.Wilson, David; Davis, Peter; Ebeling, Carl; Hutt, Charles R.; Hafner, Katrin
Complex bedding geometry in the upper portion of Aeolis Mons, Gale crater, Mars
The Upper formation of Aeolis Mons in Gale crater exhibits curvilinear bedding patterns on the surfaces of several erosional benches that have been interpreted as cross-bedding. We use High Resolution Imaging Science Experiment (HiRISE) stereo topography to test this hypothesis by measuring the bedding geometry within these benches. The bedding...Anderson, Ryan; Edgar, Lauren; Rubin, David M.; Lewis, Kevin W.; Newman, Claire
Tilt Trivia: A free multiplayer app to learn geoscience concepts and definitions
Today’s technology is opening up new ways to learn. Here, we introduce Tilt Trivia, a suite of quiz‐style, multiplayer games for use on mobile devices and tablets (Android or Apple) to help students learn simple definitions and facts. This mobile device game was built using the Unity engine and has a multiplayer functionality that runs seamlessly...Kilb, Debi; Yang, Alan; Garrett, Nathan; Pankow, Kristine; Rubinstein, Justin L.; Linville, Lisa
KG²B, a collaborative benchmarking exercise for estimating the permeability of the Grimsel granodiorite - Part 2: modeling, microstructures and complementary data
Measuring and modelling the permeability of tight rocks remains a challenging task. In addition to the traditional sources of errors that affect more permeable formations (e.g. sample selection, non-representative specimens, disturbance introduced during sample acquisition and preparation), tight rocks can be particularly prone to solid–fluid...David, Christian; Wassermann, J.; Amann, F.; Klaver, J.; Davy, C.; Sarout, J.; Esteban, L.; Rutter, E.H.; Hu, Q.; Louis, L.; Delage, P.; Lockner, David A.; Selvadurai, A.P.S.; Vanorio, T; Amann Hildenbrand, A.; Meredith, P.G.; Browning, J.; Mitchell, T.M.; Madonna, C.; Billiotte, J.; Reuschle, T.; Lasseux, D.; Fortin, J.; Lenormand, R.; Loggia, D.; Nono, F.; Boitnott, G.; Jahns, E.; Fleury. M.; Berthe, G.; Braun, P.; Grégoire, D.; Perrier, L.; Polito, P.; Jannot, Y.; Sommier, A.; Krooss, B.; Fink, R.; Clark, A.
Turing-style tests for UCERF3 synthetic catalogs
Epidemic-Type Aftershock Sequence (ETAS) catalogs generated from the 3rd Uniform California Earthquake Rupture Forecast (UCERF3) model are unique in that they are the first to combine a complex, fault-based long-term forecast with short-term earthquake clustering statistics. We present Turing-style tests to examine whether these synthetic catalogs...Page, Morgan T.; Van Der Elst, Nicholas
Stronger peak ground motion, beyond the threshold to initiate a response, does not lead to larger stream discharge responses to earthquakes
The impressive number of stream gauges in Chile, combined with a suite of past and recent large earthquakes, makes Chile a unique natural laboratory to study several streams that recorded responses to multiple seismic events. We document changes in discharge in eight streams in Chile following two or more large earthquakes. In all cases, discharge...Mohr, Christian H.; Manga, Michael; Wald, David J.
A novel technique for precision geometric correction of jitter distortion for the Europa Imaging System and other rolling shutter cameras
We use simulated images to demonstrate a novel technique for mitigating geometric distortions caused by platform motion (“jitter”) as two-dimensional image sensors are exposed and read out line by line (“rolling shutter”). The results indicate that the Europa Imaging System (EIS) on NASA’s Europa Clipper can likely meet its scientific goals...Kirk, Randolph L.; Shepherd, Makayla; Sides, Stuart
Two views from the Rainbow Falls overlook, downstream of the Wailuku River streamgage near Hilo, Hawaii. The image on the left shows a typical base flow of about 35 cubic feet per second (cfs). The image on the right shows the early impact of Hurricane Lane with a flow of about 26,000 cfs taken at 8:35 a.m. HST, August 23, 2018. This U.S. Geological Survey streamgage has...
Jenny White McKee and Pete Dal Ferro of the Pacific Coastal and Marine Science Center retrieve two airguns during the 2018 MATRIX cruise aboard the R/V Hugh R. Sharp. The seismic streamer is visible on the winch in the foreground.
Landsat 8 captured satellite views of California’s largest wildfire on record in the summer of 2018. The Mendocino Complex Fire in northern California is a combination of two fires: the Ranch Fire and the River Fire.
Both fires started July 27, and hot, dry, windy conditions caused them to spread rapidly. Landsat 8 imaged the area the day before the fires broke out...
USGS display table at the 2018 Woods Hole, MA Science Stroll
Sandy Brosnahan, Woods Hole Coastal and Marine Science Center, discusses Kilauea Volcano drone footage with Science Stroll participants
The atypical location of Mount St. Helens may be due to geologic structures that control where deep magmas can rise through the crust, as suggested by new findings published today in Nature Geoscience.
USGS and Army Corps of Engineers conduct simultaneous measurements at Sandy Neck beach, Cape Cod, MA
Woods Hole Coastal and Marine Science Center Aerial Imaging and Mapping (AIM) group conducted drone flights from atop a dune at Sandy Neck (Cape Cod) while the Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) aircraft collected data overhead.
The U.S Geological Survey announces that the agency has awarded more than $20 million in 2018 for earthquake monitoring and applied research.
Meagan Gonneea, Neil Ganju, and Matt Arsenaualt, Woods Hole Costal and Marine Science Center staff offered presentations and handouts on Natural Hazards: Coastal Hazards in Wetlands and Estuaries to participants at the Smithsonian Science Education Academies for Teachers (SSEATs. )
In July 2018, three USGS Pacific Coastal and Marine Science Center researchers installed instruments and hosted a community outreach event.
Scientists complete mission to map fast-moving fault off Alaska: Data will help coastal communities prepare for risks from earthquakes and tsunamis
Researchers from NOAA, U.S. Geological Survey and their partners have completed the first high-resolution, comprehensive mapping of one of the fastest moving underwater tectonic faults in the world, located in southeastern Alaska. This information will help communities in coastal Alaska and Canada better understand and prepare for the risks from earthquakes and tsunamis that can occur when faults suddenly move.
Better performance and new features: landslides and liquefaction estimates, population map layer, Spanish Did You Feel It?, and aftershock forecasts.
The public can now access information about active wildfires across the country using a smartphone.