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The M6.2 Petrolia Earthquake on December 20, 2021, Was Really Two Earthquakes

We can usually see the beginning and ending of one earthquake on a seismic record before another one starts. We’d like earthquakes to be well-behaved...

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New USGS Model Shows Earthquake Hazard Probability for Hawaiian Islands

A new U.S. Geological Survey study indicates that the Hawaiian Islands, especially the Island of Hawaiʻi and neighboring islands with active volcanic...

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New USGS Research Highlights the Use of Earthquake Science for Assessing Risk to Gas Pipelines

A new research study led by U.S. Geological Survey scientists assesses the risk from earthquakes to the Nation’s Gas Transmission Pipelines

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First Draft of the SZ4D Implementation Plan

Members of the Subduction Zones in 4-Dimensions (SZ4D) initiative are pleased to present to you the first draft of the SZ4D implementation plan.

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Opportunity to Provide Feedback for SZ4D Program

To those interested in USGS SZS and the SZ4D Initiative (Subduction Zones in Four Dimensions)...

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USGS Hazards Science – Be Informed and Be Prepared

Read below to learn about USGS hazards science, National Preparedness Month, and resources available to explore various hazards in more detail or sign...

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Magnitude 7.0 Earthquake near Acapulco, Mexico

A magnitude 7.0 earthquake struck Acapulco in Oaxaca, Mexico on September 7, 2021 at about 9:48 pm Eastern Daylight Time (September 8 at 01:48 UTC). 

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Magnitude 7.2 Earthquake in Haiti

A magnitude 7.2 (M 7.2) earthquake struck Haiti on August 14, 2021, at 8:29 am local time (August 14, 2021 12:29 UTC).

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10-Year Anniversary of US’s Most Widely Felt Earthquake

Ten years ago, in the early afternoon of August 23, 2011, millions of people throughout the eastern U.S. felt shaking from a magnitude 5.8 earthquake...

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Magnitude 8.2 Earthquake in Alaska

A magnitude 8.2 earthquake struck 50 miles south of the Alaska Peninsula on July 28, 2021 at 10:15 pm local time (July 29, 2021 06:15 UTC). Seismic...

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