US Earthquake Activity

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Alaska rocked by 7.3-magnitude earthquake

Alaska Earthquake 2025: How Can It Trigger a Tsunami Warning?

A 7.3 magnitude earthquake struck off the coast of Alaska on July 16, 2025. While significant, the 1964 Prince William Sound earthquake was a massive one with a 9.2 magnitude. It was the strongest ever recorded in North America and caused a huge tsunami across the Pacific.

Daily Star on MSN · 1d

Monster 7.3 magnitude earthquake rocks US coast prompting tsunami warning

· 1d · on MSN

Tsunami advisory issued after magnitude 7.3 earthquake recorded off Alaska coast

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Tsunami warning downgraded to advisory after 7.3 earthquake rocks Alaska coast

The tsunami warning was downgraded to an advisory after a 7.3 earthquake in Alaska.

Honolulu Star-Advertiser · 1d

Magnitude 7.3 earthquake strikes off Alaska, no Hawaii tsunami threat

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No tsunami danger on California coast after 7.3 magnitude earthquake in Alaska, officials say

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A tsunami warning is in effect along parts of Alaska's southern coast after 7.3 magnitude earthquake

The U.S. Tsunami Center said the warning was in effect from about 40 miles (64.4 km) southwest of Homer to Unimak Pass, a distance of about 700 miles.

Alaska Dispatch News · 1d

7.3 magnitude earthquake triggers brief tsunami warning for Southwest Alaska communities

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Tsunami warning issued after 7.2 magnitude earthquake shakes Alaska

3don MSN

Volcanoes in multiple states have been rumbling. What's going on?

Volcanoes are rumbling as scientists monitor earthquakes at Washington's Mount Rainier and Alaska's Iliamna volcano.

2don MSN

Volcanic activity in 4 key US states sparks concern, scientists monitor earthquakes at Mount Rainier; What's happening?

Volcanoes in the United States that have been active since spring woke up, brushed themselves off, and then went back to sleep. Two volcanoes, one in Alaska and one in Hawaii, are experiencing active eruptions that are minimal and not very dangerous.

Tsunami advisory issued then cancelled after shallow 7.3-magnitude quake rattles Alaska's south coast

A powerful undersea earthquake struck off the southern coast of Alaska on Wednesday, setting off a tsunami advisory and prompting concern along the state’s remote peninsula region.

5don MSN

Mount Rainier earthquake swarms decline in activity even as strongest registered Friday

Seismicity has decreased” from 30 events per hour at the peak to a few per hour as of Saturday morning, the U.S. Geological Survey said Saturday.

8don MSN

What is an earthquake swarm? Washington's most famous volcano records its ‘largest’ one in 15 years

One of the most famous mountains in Washington, Mount Rainier, has been rumbling over the last day due to the amplified seismic activity.

Newsweek1y

US earthquakes today may be aftershocks from James Madison's time

Earthquakes today in the U.S. could be left over from seismic activity in the 1800s, scientists have found. In a new study, published in the Journal of Geophysical Research: Solid Earth ...

CNN1y

Modern US earthquakes could be century-old aftershocks, study says - CNN

Aftershocks from devastating earthquakes in the 1800s near the Missouri-Kentucky border and in Charleston, South Carolina, may still be occurring, a study found.

Mercury News1y

Modern earthquakes in US could be aftershocks from quakes in the 1800s ...

The researchers found that approximately 30% of all earthquakes from 1980 to 2016 near the Missouri-Kentucky border, all magnitude 2.5 or greater, were likely aftershocks from the three major ...