Alaska earthquakes

M3.0 earthquake 205 km SSE of Unalaska, Alaska

A magnitude 3.0 earthquake struck 205 km SSE of Unalaska, Alaska on Thu, Feb 4, 2021, 9:19 PM AKST (06:19 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.0 186 km SSE of Unalaska, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
3.0 (ml), minor
Local time
UTC
2021-02-05 06:19:48 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
52.218° N, 165.193° 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 4.0 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.12
Depth from
Operator assigned
Station coverage gap
224°, poorly surrounded by stations
Stations used
30

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.2165 km SSE of Unalaska, Alaska · 2057 days ago · 26 km deep · 56 km away
  2. 3.0135 km SSE of Unalaska, Alaska · 2043 days ago · 10 km deep · 72 km away
  3. 4.0186 km SSE of Unalaska, Alaska · 2038 days ago · 10 km deep · 43 km away
  4. 3.4287 km SSE of Unalaska, Alaska · 2035 days ago · 10 km deep · 91 km away
  5. 3.5206 km ESE of Nikolski, Alaska · 2034 days ago · 10 km deep · 80 km away
  6. 2.7197 km SSE of Akutan, Alaska · 2016 days ago · 10 km deep · 49 km away
  7. 2.8south of Alaska · 2016 days ago · 10 km deep · 47 km away
  8. 2.1184 km SSE of Unalaska, Alaska · 2012 days ago · 12 km deep · 26 km away
  9. 3.0219 km SSE of Unalaska, Alaska · 2010 days ago · 10 km deep · 17 km away

Before

  1. 2.6187 km SSE of Unalaska, Alaska · 2059 days ago · 3 km deep · 18 km away
  2. 2.0134 km S of Unalaska, Alaska · 2059 days ago · 38 km deep · 91 km away
  3. 3.0158 km SSE of Akutan, Alaska · 2064 days ago · 27 km deep · 68 km away
  4. 3.6184 km SSE of Akutan, Alaska · 2080 days ago · 10 km deep · 55 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000dis4 (also filed as ak0211nn19v5). Read Thu, Sep 24, 2026, 3:32 AM UTC.