Alaska earthquakes

M3.5 earthquake 45 km NW of Atka, Alaska

A magnitude 3.5 earthquake struck 45 km NW of Atka, Alaska on Sat, May 16, 2020, 6:33 AM HADT (15:33 UTC), 207 km (129 mi) below the surface.

A larger quake followed: M4.1 19 km SSE of Atka, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.5 (ml), minor
Local time: Sat, May 16, 2020, 6:33 AM HADT
UTC: 2020-05-16 15:33:01 UTC
Depth: 207.1 km (128.7 mi), intermediate-depth
Epicenter: 52.533° N, 174.573° 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 8.6 km horizontally, 6.5 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 131°
Stations used: 37

Nearby

Within 100 km, magnitude 1.5 and up: 67 in the 60 days after this one and 28 in the 30 days before it.

After

The first 60 of 67.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us60009zu8 (also filed as ak0206atr4wz). Read Tue, Sep 29, 2026, 3:31 PM UTC.