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Natural Hazards

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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.

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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.

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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.

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News

Date published: February 7, 2019

New Products Provide an Interactive Guide to Global and Regional Sea Level Rise Scenarios for the United States

A geo-narrative and accompanying data viewer provide users a new way to visualize 2017 sea-level rise scenarios originally generated for the National Climate Assessment (NCA).

Date published: December 19, 2018

Which U.S. volcanoes pose a threat?

USGS Volcanic Threat Assessment updates the 2005 rankings.

Date published: December 12, 2018

Anchialine Biogeochemistry Research Team returns to the Yucatan Peninsula, Mexico

The Anchialine Biogeochemistry Research Team has returned to the Yucatan Peninsula Mexico to continue investigating how life persists within underwater coastal caves beneath the tropical forest.

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.

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Filter Total Items: 286
Date published: February 15, 2019
Status: Completed

September 12, 2014 Magnetic Disturbance - Peak Dst 0 nT

Space Weather Events of September 12, 2014

Contacts: Jeffrey J Love
Date published: February 15, 2019
Status: Completed

February 19, 2014 Magnetic Disturbance - Peak Dst -95 nT

Space Weather Events of February 19, 2014

Contacts: Jeffrey J Love
Date published: February 15, 2019
Status: Completed

October 1, 2012 Magnetic Disturbance - Peak Dst -119nT

Space Weather Events of October 1, 2012

Contacts: Jeffrey J Love
Date published: February 15, 2019
Status: Completed

June 1, 2013 Magnetic Disturbance - Peak Dst -120nT

Space Weather Events of June 1, 2013

Contacts: Jeffrey J Love
Date published: February 14, 2019
Status: Completed

January 23, 2012 Magnetic Disturbance - Peak Dst -66 nT

Space Weather Events of January 23, 2012

Contacts: Jeffrey J Love
Date published: February 14, 2019
Status: Completed

September 26, 2011 Magnetic Disturbance - Peak Dst -93 nT

Space Weather Events of September 26, 2011

Contacts: Jeffrey J Love
Date published: February 14, 2019
Status: Completed

February 14, 2011 Magnetic Disturbance - Peak Dst 30 nT

Space Weather Events of February 14, 2011

Contacts: Jeffrey J Love
Date published: February 14, 2019
Status: Completed

April 5, 2010 Magnetic Disturbance - Peak Dst 0 nT

Space Weather Events of April 5, 2010 and the Galaxy 15 satellite

Contacts: Jeffrey J Love
Date published: February 14, 2019
Status: Active

Magnetic Disturbance Event Summaries

Select an event to view a summary.

Date published: February 12, 2019
Status: Active

Induced Seismicity Publications

USGS publications on induced seismicity.

Date published: February 12, 2019
Status: Active

Observational Studies

The USGS is currently studying seismicity that may be induced at 6 locations across the United States. These studies involve earthquake monitoring, examining industrial data, and evaluating any relationships between seismicity and industrial actions.

Date published: February 12, 2019
Status: Active

Hazard Estimation

The USGS is currently developing new methods to evaluate the hazard due to induced earthquakes. These methods will account for the rapid changes in earthquake rate that we have witnessed in the past few years.

Filter Total Items: 144
Date published: February 7, 2019

Coastal Storm Modeling System (CoSMoS) for Southern California, v3.0, Phase 2

The Coastal Storm Modeling System (CoSMoS) makes detailed predictions (meter-scale) over large geographic scales (100s of kilometers) of storm-induced coastal flooding and erosion for both current and future sea-level rise (SLR) scenarios. CoSMoS v3.0 for Southern California shows projections for future climate scenarios (sea-level rise and storms) to provide emergency responders and...

Date published: December 20, 2018

Oceanographic and Water Quality Measurements in two Southern California Coastal Wetlands, 2013-2014

The objective was to compare an urbanized wetland with limited sediment supply (Seal Beach) with a less modified marsh (Pt. Mugu) with fluvial sediment supply. Marine temperature, conductivity, pressure sensors, optical turbidity sensors and acoustic velocity meters were deployed on bottom platforms to quantify the conditions in the water column.

Date published: December 20, 2018

Oceanographic, Atmospheric and Water-Quality Measurements Sandwich Town Neck Beach, Massachusetts, 2016

These measurements provide information about waves, tides, and overwash during a winter storm in January 2016; about waves, tides, currents, and water properties between February and May, 2016; and about waves and tides between May and June 2016, during a period that overlaps with offshore bathymetric surveys.

Date published: December 18, 2018

Oceanographic, Atmospheric and Water-Quality Measurements Sandwich Town Neck Beach, Massachusetts, 2017

These measurements provide short-duration datasets of waves, tides, and overwash from portable pressure sensors deployed on the beach during major winter storms on these dates: January 23-26; February 9-10; February 13-15; and March 13-15, 2017. Longer datasets were obtained from sensors on a platform deployed on the seafloor north of the beach in seven meters depth.

Date published: December 17, 2018

Oceanographic and Water Quality Measurements Collected in Grand Bay, Alabama/Mississippi, August 2016 – January 2017

Suspended-sediment transport is a critical element governing the geomorphology of tidal marshes and estuaries. Marshes rely both on organic material and inorganic sediment deposition to maintain their elevation relative to sea-level. Additionally, horizontal marsh extent is altered by lateral erosion and accretion. 

Date published: December 10, 2018

Massachusetts Shoreline Change Project: A GIS Compilation of Vector Shorelines for the 2018 update

The Massachusetts Office of Coastal Zone Management launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast. The shoreline position and change rate are used to inform management decisions regarding the erosion of coastal resources. 

Date published: December 10, 2018

Geospatial Data Layers of Shallow Geology, Sea-Floor Texture, and Physiographic Zones from the Inner Continental Shelf of Martha’s Vineyard from Aquinnah to Wasque Point, and Nantucket from Eel Point to Great Point

Geologic, sediment texture, and physiographic zone maps characterize the sea floor south and west of Martha's Vineyard and north of Nantucket, Massachusetts. These maps were derived from interpretations of seismic-reflection profiles, high-resolution bathymetry, acoustic-backscatter intensity, bottom photographs, and surficial sediment samples. 

Date published: December 10, 2018

Elevation of marsh units in Fire Island National Seashore and Central Great South Bay salt marsh complex, New York

Elevation distribution in the Fire Island National Seashore and Central Great South Bay salt marsh complex is given in terms of mean elevation of conceptual marsh units defined by Defne and Ganju (2018). The elevation data is based on the 1-meter resolution Coastal National Elevation Database (CoNED).

Date published: December 10, 2018

Conceptual marsh units for Fire Island National Seashore and central Great South Bay salt marsh complex, New York

The salt marsh complex of Fire Island National Seashore (FIIS) and central Great South 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

Date published: December 10, 2018

Temporal hydrologic and chemical records from the Ox Bel Ha cave network within the coastal aquifer of the Yucatan Peninsula, from January 2015 to January 2016

Natural cave passages penetrating a coastal aquifer in the Yucatan Peninsula (Mexico) were accessed to investigate how regional meteorology and hydrology control methane dynamics in karst subterranean estuaries. Three field trips were carried out in January 2015, June 2015, and January 2016 to obtain year-long high-resolution temporal records of water chemistry and environmental parameters

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.

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: 4,599
Year Published: 2019

Rayleigh wave ellipticity measurement uncertainty across the IRIS/USGS and New China Digital Seismograph Networks

Long-period Rayleigh wave horizontal to vertical amplitude (H/V) ratios at a station provide information about local earth structure that is complementary to phase velocity. However, a number of studies have observed that significant scatter appears in these measurements making it difficult to use H/V ratio measurements to resolve earth structure...

Ringler, Adam T.; Wilson, David C.; Zürn, Walter; Anthony, Robert E.

Year Published: 2019

Evaluation of temporally correlated noise in global navigation satellite system time series: Geodetic monument performance

Estimates of background noise of Global Positioning System‐derived time series of positions for 740 sites in the western United States are examined. These data consist of daily epochs of three components of displacements that are at least 9.75 years long within the interval between 2000 and 2018. We find that these time series have...

Langbein, John; Svarc, Jerry L.

Year Published: 2019

The compositions of the lunar crust and upper mantle: Spectral analysis of the inner rings of lunar impact basins

The innermost ring in impact basins exposes material originating from various depths, and can be used to study the composition of the lunar crust with depth. In this study, we conduct quantitative mineralogical analyses of the innermost ring in 13 lunar impact basins using reflectance data from the Kaguya Multiband Imager and...

Lemelin, Myriam; Lucey, Paul G.; Miljković, Katarina; Gaddis, Lisa R.; Hare, Trent M.; Ohtake, Makiko

Year Published: 2019

The Shumagin seismic gap structure and associated tsunami hazards, Alaska convergent margin

The potential for a major earthquake in the Shumagin seismic gap, and the tsunami it could generate, was reported in 1971. However, while potentially tsunamigenic splay faults in the adjacent Unimak and Semidi earthquake segments are known, such features along the Shumagin segment were undocumented until recently. To investigate margin structure...

Detweiler, Shane T.; von Huene, Roland E.; Miller, John J.; Krabbenhoeft, Anne

Year Published: 2019

The formation of gullies on Mars today

A decade of high-resolution monitoring has revealed extensive activity in fresh Martian gullies. Flows within the gullies are diverse: they can be relatively light, neutral or dark, colourful or bland, and range from superficial deposits to 10 m-scale topographic changes. We observed erosion and transport of material within gullies, new terraces,...

Dundas, Colin M.; McEwen, Alfred S.; Diniega, Serina; Hansen, Candice J.; McElwaince, Jim N.

Year Published: 2019

The flood lavas of Kasei Valles, Mars

Both the northern and southern arms of Kasei Valles are occupied by platy-ridged flood lavas. We have mapped these flows and examined their morphology to better understand their emplacement. The lavas were emplaced as high-flux, turbulent flows (exceeding 106 m3 s−1). Lava in southern Kasei Valles can be traced back up onto the...

Dundas, Colin M.; Cushing, Glen E.; Kestay, Laszlo P.

Year Published: 2019

How physics‐based earthquake simulators might help improve earthquake forecasts

Questions have persisted on the usefulness of physics‐based earthquake simulators with respect to forecasting earthquakes, due mostly to the inevitable assumptions, approximations, and uncertainties. Whether any model is reliable or trustworthy depends entirely on what questions we are asking of it, so the point of this article is to outline a...

Field, Edward H.

Year Published: 2018

Coseismic sackungen in the New Madrid seismic zone, USA

High‐resolution lidar reveals newly recognized evidence of strong shaking in the New Madrid seismic zone in the central United States. We mapped concentrations of sackungen (ridgetop spreading features) on bluffs along the eastern Mississippi River valley in northwestern Tennessee that likely form or are reactivated during large earthquakes. These...

Delano, Jaime E.; Gold, Ryan D.; Briggs, Richard W.; Jibson, Randall W.

Year Published: 2018

On the potential duration of the aftershock sequence of the 2018 Anchorage earthquake

Currently, an aftershock sequence is ongoing in Alaska after the magnitude 7.0 Anchorage earthquake of November 30, 2018. Using two scenarios, determined with observations as of December 14, 2018, this report estimates that it will take between 2.5 years and 3 decades before the rate of aftershocks decays to the rate of earthquakes that were...

Michael, Andrew J.
Michael, A.J., 2018, On the potential duration of the aftershock sequence of the 2018 Anchorage earthquake: U.S. Geological Survey Open-File Report 2018–1195, 6 p., https://doi.org/10.3133/ofr20181195.

Year Published: 2018

Earthquakes induced by hydraulic fracturing are pervasive in Oklahoma

Wastewater disposal is generally accepted to be the primary cause of the increased seismicity rate in Oklahoma within the past decade, but no statewide analysis has investigated the contribution of hydraulic fracturing (HF) to the observed seismicity or the seismic hazard. Utilizing an enhanced seismicity catalog generated with multi‐station...

Skoumal, Robert J.; Ries, Rosamiel; Brudzinski, Michael R.; Barbour, Andrew J.; Currie, Brian S.

Year Published: 2018

Microseismic events associated with the Oroville Dam spillway

On 14 February 2017, two small (equivalent MD 0.8 and 1.0) seismic events occurred in proximity to the Oroville Dam in the Sierra Nevada foothills, California. To examine possible causal relationships between these events and reservoir operations, including the spillway failure starting prior to these events, we applied a new optimized template...

Skoumal, Robert J.; Dawson, Phillip B.; Hickman, Stephen H.; Kaven, J. Ole

Year Published: 2018

Ground motions from induced earthquakes in Oklahoma and Kansas

Improved predictions of earthquake ground motions are critical to advancing seismic hazard analyses and earthquake response. The high seismicity rate from 2009 to 2016 in Oklahoma and Kansas provides an extensive data set for examining the ground motions from these events. We evaluate the ability of three suites of ground‐motion prediction...

Moschetti, Morgan P.; Thompson, Eric M.; Powers, Peter M.; Hoover, Susan M.; McNamara, Daniel E.

Filter Total Items: 12
Date published: January 31, 2019

Digital Shoreline Analysis System

Digital Shoreline Analysis System version 5.0

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 26, 2016

Earthquake Software

Designed to facilitate the study of earthquakes, faults, and seismic related events.

Date published: April 26, 2016

Landslide software

Various software designed for landslide assessments and modeling.

Attribution: Natural Hazards
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: 2,698
Map showing the locations of all U.S. volcanoes
December 31, 2018

Map of volcano threat category designated by color

Map showing the locations of all U.S. volcanoes with their threat category designated by color. Very high threat is red, high is orange, moderate is yellow, low is green, and very low is blue. 

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

...
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).

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.

Brown landscape with volcano in the background
December 31, 2018

Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern Ca

Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern California, looms above Little Glass Mountain, a thick obsidian flow erupted from the Medicine Lake shield volcano about 1,000 years ago. These are just two of the young volcanic areas monitored by the USGS California Volcano Observatory. USGS photo.

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.

A USGS technician services a ShakeAlert sensor station in the San Francisco Bay area
December 31, 2018

ShakeAlert sensor station being serviced by USGS personnel

A USGS electronics technician performs maintenance on a ShakeAlert Earthquake Early Warning (EEW) sensor station, located in the San Francisco Bay Area. ShakeAlert station components include strong-motion accelerometers, solar panel and battery power systems, and communications & telemetry equipment for communication with the wider ShakeAlert network. 

 Department of Interior UAS pilots
December 31, 2018

UAS pilots at Kilauea

 Department of Interior UAS pilots from left to right – Elizabeth Pendleton (USGS, Woods Hole, MA), Colin Milone (Office of Aviation Services, AK), John Vogel (USGS; Flagstaff, AZ), Sandy Brosnahan (USGS, Woods Hole, MA), Brandon Forbes (USGS; Tuscon, AZ), Chris Holmquist-Johnson

...
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 (

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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.

Filter Total Items: 407
Date published: February 7, 2019

New Products Provide an Interactive Guide to Global and Regional Sea Level Rise Scenarios for the United States

A geo-narrative and accompanying data viewer provide users a new way to visualize 2017 sea-level rise scenarios originally generated for the National Climate Assessment (NCA).

Date published: December 19, 2018

Which U.S. volcanoes pose a threat?

USGS Volcanic Threat Assessment updates the 2005 rankings.

Date published: December 12, 2018

Anchialine Biogeochemistry Research Team returns to the Yucatan Peninsula, Mexico

The Anchialine Biogeochemistry Research Team has returned to the Yucatan Peninsula Mexico to continue investigating how life persists within underwater coastal caves beneath the tropical forest.

Date published: November 30, 2018

2018 Anchorage Earthquake

A magnitude 7.0 earthquake struck north of Anchorage, Alaska, on November 30, 2018, at 8:29 a.m. local time (17:29:28 UTC).  For the most up-to-date information, please visit the USGS event page, and for estimates of casualties and damage, visit the USGS Prompt Assessment of Global Earthquakes for Response (PAGER) website.

Date published: November 19, 2018

The Woods Hole Coastal and Marine Science Center Aerial Imaging and Mapping Group Aids in Monitoring and Mapping the Kīlauea Volcanic Eruption

On May 3, 2018, Kīlauea, one of the world’s most active volcanoes, began an over three-month-long eruption. Tina Neal and the rest of her team at the U.S. Geological Survey Hawaiian Volcano Observatory (HVO) have been spearheading all Kīlauea monitoring and data-analysis efforts, and continue to provide regular updates on the status...

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

Debris - Flow Forecasts Before Wildfires

USGS scientists have been pursuing a way to assess debris flow hazards before a fire occurs.

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.

Filter Total Items: 177