Alaska earthquakes

M3.6 earthquake 224 km W of Adak, Alaska

A magnitude 3.6 earthquake struck 224 km W of Adak, Alaska on Sat, Jun 27, 2020, 3:47 PM HADT (00:47 UTC), 97 km (60 mi) below the surface.

A larger quake followed: M4.9 170 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.6 (mb), minor
Local time: Sat, Jun 27, 2020, 3:47 PM HADT
UTC: 2020-06-28 00:47:54 UTC
Depth: 97.0 km (60.2 mi), intermediate-depth
Epicenter: 51.774° N, 179.884° 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 8.2 km horizontally, 10.5 km in depth
Magnitude uncertainty: ±0.11
Depth from: From location
Station coverage gap: 124°
Stations used: 55

Nearby

Within 100 km, magnitude 1.5 and up: 127 in the 60 days after this one and 57 in the 30 days before it.

After

The first 60 of 127.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000akkh (also filed as ak02089p0nqb). Read Wed, Sep 30, 2026, 4:15 AM UTC.