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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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Tsunami Scenario
Date Published: September 4, 2013

The SAFRR Tsunami Scenario is a hypothetical but plausible tsunami created by a magnitude 9.1 earthquake offshore of the Alaskan peninsula. The scenario report was released September 2013 and provides an analysis of the potential impacts along the California coast, intended for those who need to make mitigation, preparedness, and outreach decisions before and after tsunami impacts.

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water levels during Hurricane Nate overtopped and eroded the rock barrier
October 10, 2017
Elevated water levels during Hurricane Nate overtopped and eroded the rock barrier that was constructed to close the breach that formed in Dauphin Island during Hurricane Katrina. The predicted probability of inundation in this location was 96%.
Pre-and Post Storm Photo for Hurricane Nate - Dauphin Island
October 10, 2017
Elevated water levels and high waves during Hurricane Nate overtopped low spots in the line of dunes near Fort Morgan, Alabama. The fan-like sand deposits behind the dunes indicate that sand was transported landward, while the sandbar offshore indicates that sand was also transported seaward during the storm. The predicted probability of overwash for this location was 84%.
dunes were overtopped on West Ship Island
October 10, 2017
On the east end of West Ship Island, dunes were overtopped by elevated water levels during Hurricane Nate. The predicted probability of overwash for this location was 100%.
Potential coastal change impacts for Hurricane Nate - Oct. 7, 2017
October 7, 2017
Screen shot of the Coastal Change Hazards Portal showing potential coastal change impacts during a direct landfall of Hurricane Nate based on NHC Advisory 12, 0800 AM EDT SAT OCT 07 2017.
Erosion forecast map for Northern Gulf sandy shorelines
October 6, 2017
Tropical Storm Nate's predicted effect on Northern Gulf sandy shorelines, based on landfall as a Category 1 hurricane, is shown at three intensities. Outer band: Dune erosion. Middle band: Dune overwash. Inner band: Dune inundation, with potential flooding behind the dune. Credit: USGS Coastal Change Hazard Portal.
Palm Island illustrates varying coastal responses to elevated water levels during Irma
2017 (approx.)
Location 9: This beach on Palm Island illustrates varying coastal responses to elevated water levels during Irma. The southern portion of the beach experienced beach erosion, the northern portion overwashed, and the middle section was inundated. Predicted probabilities of dune erosion, overwash, and inundation were 100, 98, and 78 percent respectively.
elevated water levels during Hurricane Irma overtopped the low-elevation dunes on Keewaydin Island
2017 (approx.)
Location 2: Elevated water levels during Hurricane Irma overtopped the low-elevation dunes on Keewaydin Island near Naples, depositing sand on top of and behind the dunes in overwash fans. The predicted probability of overwash in this location was 100%.
small areas of overwash
2017 (approx.)
Location 4: The beach in south Naples shows small areas of overwash where sand from the beach and dunes was deposited behind the seawall. The beach and dunes in front of the seawall were completely removed by the waves and surge of Hurricane Irma. The predicted probability of overwash was 100%.
inlet at Cayo Costa was widened and sand transported inland
2017 (approx.)
Location 6: The inlet at Cayo Costa was widened and sand transported inland by high waves and surge during Hurricane Irma. The predicted probability of inundation for this location was 90%.
home on Little Gasparilla Island was swept away
2017 (approx.)
Location 8: A home on Little Gasparilla Island was swept away by Hurricane Irma’s waves and surge. The beach narrowed significantly and two more homes are now more vulnerable to future storm impacts. The predicted probability of overwash for this location was 97%.
Marco Island before and after Hurricane Irma
2017 (approx.)
Location 1: Even though the predicted probability of overwash was 99%, elevated water levels during Hurricane Irma did not overtop the seawall on the southern end of Marco Island, but eroded much of the beach in front. Some overwash can be seen to the north of the seawall.
small breach formed at a low spot on Keewaydin Island
2017 (approx.)
Location 3: A small breach formed at a low spot on Keewaydin Island. The predicted probability of inundation in this location was 100%.
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Satellite captured image of the rapidly intensifying storm, Harvey
August 25, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

This is a screenshot of the USGS Coastal Change Hazards Portal, which shows current coastal impact projections for Hurricane Har
August 25, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

UPDATE: This story has been revised to reflect new NOAA-National Hurricane Center storm surge projections which were released August 25 at 7 a.m.

This is a screenshot of the USGS Coastal Change Hazards Portal, which shows current coastal impact projections for Hurricane Har
August 24, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

UPDATE: This story has been revised to reflect new NOAA-National Hurricane Center storm surge projections which were released August 25 at 7 a.m.

Satellite image of Hurricane Harvey
August 24, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

Storm-tide sensors are being installed at key locations along the Texas Gulf Coast by the U.S. Geological Survey in advance of Hurricane Harvey.

USGS visual identity - green
August 14, 2017

The U.S. Geological Survey awarded approximately $4.9 million this week to six universities and a university-governed non-profit, to support transitioning the west coast “ShakeAlert” earthquake early warning system into a production system.

House damage in central Oklahoma from a magnitude 5.6 earthquake in 2011
August 11, 2017

Editor:  In the public interest and in accordance with Federal Aviation Administration regulations, the USGS is announcing this low-level airborne project.  Your assistance in informing the local communities is appreciated.

snow-capped volcano, Mount Hood on the horizon, with city of Portland, Oregon in foreground
August 8, 2017

Join volcano scientists from around the world during scientific meeting and associated public event in Portland.

Earthquake Catalog Map Results Example
August 8, 2017

After the next significant earthquake, many sources will be disseminating information from a variety of accounts, tools and services.

A gas plume arising from Augustine Volcano during it's eruptive phase 2005-06.
August 7, 2017

True or False:  Lightning that takes place during a volcanic eruption is the same as lightning that occurs during a thunderstorm?

Image: USGS Logo
July 31, 2017

A new U.S. Geological Survey-led study suggests that earthquake-related deformation just below the Earth's surface can be quite different from how it is expressed at the surface.

Girls points to a location on a map laying on the ground.
July 27, 2017

MEDIA ADVISORY

Twenty-five middle-school girls from 11 cities in Washington and Oregon are participating in the third annual “GeoGirls” outdoor volcano science program at Mount St. Helens, jointly organized by the U.S. Geological Survey and the Mount St. Helens Institute.