Alaska earthquakes

M3.0 earthquake 253 km W of Adak, Alaska

A magnitude 3.0 earthquake struck 253 km W of Adak, Alaska on Tue, Apr 28, 2020, 5:31 AM GMT+12 (17:31 UTC), 86 km (53 mi) below the surface.

A larger quake followed: M5.2 186 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
3.0 (ml), minor
Local time
UTC
2020-04-27 17:31:08 UTC
Depth
86.0 km (53.5 mi), intermediate-depth
Epicenter
51.613° N, 179.716° E
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 4.3 km horizontally, 4.4 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
135°
Stations used
25

Nearby

Within 100 km, magnitude 1.5 and up: 115 in the 60 days after this one and 57 in the 30 days before it.

After

The first 60 of 115.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009isa (also filed as ak0205ffpuuv). Read Wed, Sep 30, 2026, 5:29 AM UTC.