Alaska earthquakes

M5.0 earthquake 238 km WSW of Adak, Alaska

A magnitude 5.0 earthquake struck 238 km WSW of Adak, Alaska on Mon, Mar 2, 2020, 8:41 PM GMT-12 (08:41 UTC), 10 km (6 mi) below the surface.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 5.0 (mww), moderate
Local time: Mon, Mar 2, 2020, 8:41 PM GMT-12
UTC: 2020-03-03 08:41:58 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.036° N, 179.795° W
Region: Alaska
Felt reports: 2
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

2 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Reverse (thrust)
Moment magnitude: 5.0 Mww
Nodal plane 1: Strike 267°, dip 32°, rake 103°
Nodal plane 2: Strike 72°, dip 59°, rake 82°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 3.2 km horizontally, 1.8 km in depth
Magnitude uncertainty: ±0.05
Depth from: Operator assigned
Station coverage gap: 114°
Stations used: 142

Nearby

Within 100 km, magnitude 2.0 and up: 66 in the 60 days after this one and 45 in the 30 days before it.

After

The first 60 of 66.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us600088i8 (also filed as ak0202wbvc1u, iscgem617606886). Read Wed, Sep 30, 2026, 5:13 AM UTC.