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
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.
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
Geomagnetism is the study of the Earth's magnetic field. This includes the fields produced by the Earth as well as those interacting with the Earth. Internal dynamo processes within the Earth create slowly changing magnetic fields. The continuous flow of particles and fields from the Sun (called the solar wind) interacts with the Earth's magnetic field. Strong, transient impulses due to solar...
Understanding the processes that control local sediment fluxes is critical in evaluating regional vulnerability to coastal erosion. This project task involves the analysis of observational data collected as part of the South Carolina Coastal Erosion Study (SCCES), and additional coastal process modeling for the Grand Strand region....
The most prominent morphologic features along the shoreline of the Carolinas are its four capes. From north to south, Cape Hatteras, Cape Lookout, Cape Fear, and Cape Romain segment the coastline into the northern outer banks, Raliegh Bay, Onslo Bay, and Long Bay regions. Continental shelf areas seaward of the capes are characterized by large, highly dynamic shoal complexes, which influence...
Fire Island, a 50-km long barrier-island system between Fire Island Inlet and Moriches Inlet, attracts significant tourism, includes federal, state, and county parks, contains a number of coastal communities, provides storm damage protection to the adjacent heavily populated mainland, and supports a distinct barrier island ecosystem, all of which are affected by coastal change. Mitigating the...
Sidescan sonar, single beam bathymetry, and navigation collected offshore of Sandwich Beach in 2016, U.S. Geological Field Activity 2016-030-FA
The objectives of the survey were to provide bathymetric and sidescan sonar data for sediment transport studies and coastal change model development for ongoing studies of nearshore coastal dynamics along Sandwich Town Neck Beach, MA. Data collection equipment used for this investigation are mounted on an unmanned surface vehicle (USV) uniquely adapted from a commercially sold gas-...
Table and accompanying photographs for biogeomorphic classification of shorebird nesting sites on the U.S. Atlantic coast from March to September, 2016
Atlantic coast piping plover (Charadrius melodus) nest sites are typically found on low-lying beach and dune systems, which respond rapidly to coastal processes like sediment overwash, inlet formation, and island migration that are sensitive to climate-related changes in storminess and the rate of sea-level rise. Data were obtained to understand piping plover habitat distribution and...
Grand Bay, a 30-square-kilometer embayment of the Gulf of Mexico bordered by 20 square kilometers of salt marsh, is experiencing rapid lateral shoreline erosion at up to 5 meters per year. Determining whether the eroded sediment is exported to the deep ocean or imported via tidal channels and deposited on the marsh platform is critical to understanding the long-term response of the marsh to...
To better identify the significant processes affecting our coastlines and how those processes create coastal change we have developed a Coupled Ocean – Atmosphere – Wave – Sediment Transport (COAWST) Modeling System, which is integrated by the Model Coupling Toolkit to exchange data fields between the ocean model ROMS, the atmosphere model WRF, the wave model SWAN, and the sediment...
Collections inventory for the U.S. Geological Survey Woods Hole Coastal and Marine Science Center Samples Repository
The collections inventory database for the U.S. Geological Survey (USGS) Woods Hole Coastal and Marine Science Center (WHCMSC) Samples Repository is published as a USGS data release (Buczkowski and others, 2018), and is available to search online through the Samples Repository’s inventory search interface. Sample collections in the Repository can be searched and selected through a map...
Effect of pore fluid chemistry on the sedimentation and compression behavior of pure, endmember fines
The data in this release support the correlation effort by providing: 1) sedimentation results that provide insight into micro-scale sediment fabric and void ratio dependence on sediment/fluid interactions, and 2) consolidation results that quantify the macro-scale compressibility and recompressibility parameters for a suite of fine-grained sediments and differing pore fluids.
Movie-maps of low-latitude horizontal-intensity magnetic disturbance are derived from magnetic vector time series data collected at multiple ground-based observatories. Using a technique similar to that used in the calculation of Dst, a quiet time baseline is subtracted from the time series from each observatory. The remaining disturbance time series are shown in a polar coordinate system that...
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
This map shows the location of and evidence for recent movement on active fault traces within the Hayward Fault Zone, California.
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.
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.
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.
CSMP is a cooperative program to create a comprehensive coastal and marine geologic and habitat base map series for all of California's State waters. Data collected during this project reveal the seafloor offshore of the California coast in unprecedented detail and provide an ecosystem context for the effective management of this precious marine resource.
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.
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 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.
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.
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
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
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
Candidate products for operational earthquake forecasting illustrated using the HayWired planning scenario, including one very quick (and not‐so‐dirty) hazard‐map option
In an effort to help address debates on the usefulness of operational earthquake forecasting (OEF), we illustrate a number of OEF products that could be automatically generated in near‐real time. To exemplify, we use an M">M 7.1 mainshock on the Hayward fault, which is very similar to the U.S. Geological Survey (USGS) HayWired earthquake...Field, Edward; Milner, Kevin R.
An updated method for estimating landslide‐event magnitude
Summary statistics derived from the frequency–area distribution (FAD) of inventories of triggered landslides allows for direct comparison of landslides triggered by one event (e.g. earthquake, rainstorm) with another. Such comparisons are vital to understand links between the landslide‐event and the environmental characteristics of the area...Tanyas, Hakan; Allstadt, Kate E.; van Weston, Cees J.
Frictional properties and 3-D stress analysis of the southern Alpine Fault, New Zealand
New Zealand's Alpine Fault (AF) ruptures quasi-periodically in large-magnitude earthquakes. Paleoseismological evidence suggests that about half of all recognized AF earthquakes terminated at the boundary between the Central and South Westland sections of the fault. There, fault geometry and the polarity of uplift change. The South Westland...Boulton, Carolyn; Barth, Nicolas C.; Moore, Diane E.; Lockner, David A.; Townend, John; Faulkner, Daniel R.
Map of recently active traces of the Rodgers Creek Fault, Sonoma County, California
The accompanying map and digital data identify recently active strands of the Rodgers Creek Fault in Sonoma County, California, interpreted primarily from the geomorphic expression of recent faulting on aerial photography and hillshade imagery derived from airborne lidar data. A recently active fault strand is defined here as having evidence...Hecker, Suzanne; Randolph Loar, Carolyn E.
Using geologic structures to constrain constitutive laws not accessible in the laboratory
In this essay, we explore a central problem of structural geology today, and in the foreseeable future, which is the determination of constitutive laws governing rock deformation to produce geologic structures. Although laboratory experiments provide much needed data and insights about constitutive laws, these experiments cannot cover...Nevitt, Johanna; Warren, Jessica M.; Kumamoto, Kathryn M.; Pollard, David D.
Why aftershock duration matters for probabilistic seismic hazard assessment
Most hazard assessments assume that high background seismicity rates indicate a higher probability of large shocks and, therefore, of strong shaking. However, in slowly deforming regions, such as eastern North America, Australia, and inner Honshu, this assumption breaks down if the seismicity clusters are instead aftershocks of historic and...Shinji Toda; Stein, Ross S.
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).
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.
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
Woods Hole Coastal and Marine Science Center staff, Tarandeep Kalra (pointing in light blue shirt) and Zafer Defne (orange USGS shirt) discuss oceanographic models with Science Stroll attendees
USGS Unmanned Aerial Systems (UAS) pilot, Elizabeth Pendleton, setting a target in Great Marsh, Sandy Neck Beach, Cape Cod, Massachusetts
Sandy Brosnahan (left) and Ellizabeth Pendleton (right), Woods Hole Coastal and Marine Science Center Unmanned Aerial Systems (UAS) pilots flying drones at Sandy Neck Beach, Cape Cod, MA.
Woods Hole Coastal and Marine Science Center Unmanned Aerial Systems (UAS) pilots Sandy Brosnahan (left) and Elizabeth Pendleton conduct a drone flight from atop a dune at Sandy Neck (Cape Cod).
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.
Twenty-five middle-school girls from Washington and Oregon are participating in the fourth annual “GeoGirls” outdoor volcano science program at Mount St. Helens, jointly organized by the U.S. Geological Survey and the Mount St. Helens Institute.
A model developed by researchers at Indiana University and the USGS can help experts address such risks by estimating the likelihood of landslides that will be caused by earthquakes anywhere in the world within minutes. Read story.
USGS scientists produced an animated GIF in coordination with the California Department of Transportation (Caltrans) re-opening of State Highway 1 through Big Sur on July 18, 2018.