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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Map

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
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.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

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 todayAlaska earthquakesLive 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.