Alaska earthquakes

M3.8 earthquake 61 km ESE of Adak, Alaska

A magnitude 3.8 earthquake struck 61 km ESE of Adak, Alaska on Sun, Jul 5, 2020, 8:46 AM HADT (17:46 UTC), 52 km (32 mi) below the surface.

A larger quake followed: M4.0 72 km NE of Adak, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.8 (mb), minor
Local time: Sun, Jul 5, 2020, 8:46 AM HADT
UTC: 2020-07-05 17:46:33 UTC
Depth: 52.2 km (32.5 mi), shallow
Epicenter: 51.611° N, 175.850° W
Region: Alaska
Felt reports: 1
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 3.6 km horizontally, 9.5 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 203°, poorly surrounded by stations
Stations used: 42

Nearby

Within 100 km, magnitude 1.5 and up: 152 in the 60 days after this one and 81 in the 30 days before it.

After

The first 60 of 152.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000aick (also filed as ak0208ljw6wh). Read Tue, Sep 29, 2026, 5:54 PM UTC.