Alaska earthquakes

M2.8 earthquake 23 km SSW of Adak, Alaska

A magnitude 2.8 earthquake struck 23 km SSW of Adak, Alaska on Sun, Mar 15, 2020, 7:43 PM HADT (04:43 UTC), 72 km (45 mi) below the surface.

A larger quake followed: M5.0 71 km WNW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.8 (ml), micro
Local time: Sun, Mar 15, 2020, 7:43 PM HADT
UTC: 2020-03-16 04:43:09 UTC
Depth: 72.0 km (44.7 mi), intermediate-depth
Epicenter: 51.681° N, 176.761° 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 6.5 km horizontally, 7.7 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 214°, poorly surrounded by stations
Stations used: 31

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 156 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70008th6 (also filed as ak0203hrhcjn). Read Wed, Sep 30, 2026, 7:14 AM UTC.