Alaska earthquakes

M4.7 earthquake 188 km WSW of Adak, Alaska

A magnitude 4.7 earthquake struck 188 km WSW of Adak, Alaska on Sat, Nov 7, 2020, 2:15 AM HAST (12:15 UTC), 31 km (19 mi) below the surface.

A larger quake followed: M6.1 230 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 4.7 (mb), light
Local time: Sat, Nov 7, 2020, 2:15 AM HAST
UTC: 2020-11-07 12:15:39 UTC
Depth: 31.3 km (19.5 mi), shallow
Epicenter: 51.136° N, 179.084° 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 4.1 km horizontally, 5.2 km in depth
Magnitude uncertainty: ±0.03
Depth from: From location
Station coverage gap: 140°
Stations used: 107

Nearby

Within 100 km, magnitude 1.7 and up: 100 in the 60 days after this one and 63 in the 30 days before it.

After

The first 60 of 100.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000cbs9 (also filed as ak020ec6ws4z, ak020ec6ws3d). Read Sun, Sep 27, 2026, 6:14 PM UTC.