Alaska earthquakes

M3.3 earthquake 256 km SW of Adak, Alaska

A magnitude 3.3 earthquake struck 256 km SW of Adak, Alaska on Sat, Mar 14, 2020, 3:26 PM GMT-12 (03:26 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.9 261 km WSW of Adak, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.3 (ml), minor
Local time: Sat, Mar 14, 2020, 3:26 PM GMT-12
UTC: 2020-03-15 03:26:36 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 50.187° N, 179.126° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 2.6 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.13
Depth from: Operator assigned
Station coverage gap: 266°, poorly surrounded by stations
Stations used: 27

Nearby

Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 14 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70008fs0 (also filed as ak0203g38zfa). Read Wed, Sep 30, 2026, 5:13 AM UTC.