Alaska earthquakes

M2.6 earthquake 102 km ESE of Adak, Alaska

A magnitude 2.6 earthquake struck 102 km ESE of Adak, Alaska on Mon, Apr 19, 2021, 4:10 AM HADT (13:10 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M3.7 106 km ESE of Adak, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.6 (ml), micro
Local time: Mon, Apr 19, 2021, 4:10 AM HADT
UTC: 2021-04-19 13:10:13 UTC
Depth: 35.0 km (21.7 mi), shallow
Epicenter: 51.517° N, 175.272° 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 3.2 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.13
Depth from: Operator assigned
Station coverage gap: 238°, poorly surrounded by stations
Stations used: 24

Nearby

Within 100 km, magnitude 1.5 and up: 55 in the 60 days after this one and 78 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000e38w (also filed as ak02150hdmqc). Read Thu, Sep 24, 2026, 8:30 AM UTC.