Geologic Hazards Science Center

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Filter Total Items: 29
Date published: January 17, 2020

As Aftershocks Continue in Puerto Rico, USGS Supports Quake Recovery

A sequence of earthquakes in southwest Puerto Rico continues to affect people living there, with the largest recent aftershock a magnitude 5.2 on Jan. 15. U.S. Geological Survey scientists on the island and the mainland are providing up-to-date scientific information to help the Commonwealth government and the Federal Emergency Management Agency make decisions that protect the public.

Date published: December 11, 2019

USGS provides update for the National Seismic Hazard Model

USGS experts recently released a study that incorporates the latest earthquake science findings into an update of the National Seismic Hazard Model for the “lower-48” United States.  Read the full report here:  https://journals.sagepub.com/doi/full/10.1177/8755293019878199

Date published: November 21, 2019

Extending Rupture History in Grand Tetons National Park (SSA News Release)

"19 November 2019–Hand-dug trenches around Leigh Lake in Grand Teton National Park in Wyoming reveal evidence for a previously unknown surface-faulting earthquake in along the Teton Fault—one occurring about 10,000 years ago." A Seismological Society of America news release covers recent research published by USGS scientists and cooperators.

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Date published: October 25, 2019

Deep Landslides Not Reactivated by 2018 Anchorage Quake (SSA News)

"Major landslides triggered by the 1964 magnitude 9.2 Great Alaska earthquake responded to, but were not reactivated by, the magnitude 7.1 Anchorage earthquake that took place  30 November 2018, researchers concluded in a new study published in Seismological Research Letters."

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Date published: October 17, 2019

What if the ShakeAlert Earthquake Early Warning System Had Been Operating During the M6.9 1989 Loma Prieta Earthquake?

How will ShakeAlert® likely perform now on a large earthquake impacting a major urban area? How much warning will you get? To answer this, let’s do a thought experiment...

Read the new Science for Everyone article at What if the ShakeAlert Earthquake Early Warning System...

Date published: October 16, 2019

The 2019 Great ShakeOut

When the ground starts to shake, what do you do?  Great ShakeOut 2019:  Drop, Cover, and Hold On!

Date published: October 11, 2019

New Earthquake Science for Everyone Web Article

The goal of an earthquake early warning (EEW) system is to provide an alert to people and automatic systems after an earthquake begins but before the shaking reaches their location. Two recent studies explored the timeliness and accuracy of alerts.

Read Earthquake Early Warning...

Date published: October 9, 2019

Landslide Risks Highlighted in New Online Tool

The U.S. Geological Survey today unveiled a new web-based interactive map that marks an important step toward mapping areas that could be at higher risk for future landslides. In collaboration with state geological surveys and other federal agencies, USGS has compiled much of the existing landslide data into a searchable, web-based interactive map called the U.S. Landslide Inventory Map.

Date published: September 20, 2019

New Earthquake Science for Everyone Web Article

Two of the first questions that come to mind for anyone who just felt an earthquake are, “Will there be another one?” and “Will it be larger?”.

Read Could the M7.1 Ridgecrest, CA Earthquake Sequence Trigger a Large Earthquake Nearby?

Date published: August 22, 2019

Potential Landslide Paths and Implications for Tsunami Hazards in Glacier Bay, Alaska – An Initial Investigation

A new "Science for Everyone" article summarizes a recent publication about the potential of landslide-triggered tsunamis in Glacier Bay National Park and Preserve.

Date published: August 1, 2019

GSA News Release: New Geosphere Study Examines 2017–2018 Thomas Fire Debris Flows

GSA's news release on the recent USGS-authored publication from the Landslide Hazards Program: Inundation, flow dynamics, and damage in the 9 January 2018 Montecito debris-flow event, California, USA: Opportunities and challenges for post-wildfire risk assessment.