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M7.9

261 km SE of Chiniak, Alaska

261 km SE of Chiniak, Alaska

Major 🌊 Tsunami
Magnitude
7.9
Depth
0.0 km
Time
2018-01-23 09:31 UTC
Location
56.0039°, -149.1658°
Tsunami
Yes
USGS ID
us2000cmy3

FAQ About This Earthquake

How strong was it?
M7.9 earthquake (classified as major). This magnitude can cause widespread damage.
Where was it?
The epicenter was at 261 km SE of Chiniak, Alaska, at a depth of 0 km.
When did it happen?
2018-01-23 09:31 UTC.
Is this area earthquake-prone?
This region is located in a seismically active tectonic zone where plate interactions cause regular earthquake activity.
What should I do during an earthquake?
Drop, Cover, and Hold On. Drop to hands and knees, cover your head under sturdy furniture, and hold on until shaking stops.

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A M7.9 earthquake struck 261 km SE of Chiniak, Alaska at a depth of 10 km. This early 21st century seismic event was recorded and analyzed by the US Geological Survey. This earthquake occurred in a subduction zone, where one plate descends beneath another into the mantle. Subduction zones generate the planet's most powerful earthquakes.

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