Alaska earthquakes

M1.6 earthquake 157 km WSW of Adak, Alaska

A magnitude 1.6 earthquake struck 157 km WSW of Adak, Alaska on Sat, Jun 12, 2021, 8:17 PM HADT (05:17 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M4.3 83 km W of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
1.6 (ml), micro
Local time
UTC
2021-06-13 05:17:18 UTC
Depth
20.4 km (12.7 mi), shallow
Epicenter
51.278° N, 178.698° 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 1.1 km horizontally, 3.1 km in depth
Magnitude uncertainty
±0.41
Depth from
From location
Station coverage gap
289°, poorly surrounded by stations
Stations used
10

Nearby

Within 100 km, magnitude 1.5 and up: 151 in the 60 days after this one and 24 in the 30 days before it.

After

The first 60 of 151.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event av91275946. Read Thu, Sep 24, 2026, 1:39 PM UTC.