Alaska earthquakes

M3.6 earthquake 155 km SE of Atka, Alaska

A magnitude 3.6 earthquake struck 155 km SE of Atka, Alaska on Sat, Mar 6, 2021, 12:25 PM HAST (22:25 UTC), 23 km (14 mi) below the surface.

A larger quake followed: M4.2 76 km ESE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
3.6 (mb), minor
Local time
UTC
2021-03-06 22:25:33 UTC
Depth
23.1 km (14.3 mi), shallow
Epicenter
51.317° N, 172.442° 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 2.8 km horizontally, 7.3 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
206°, poorly surrounded by stations
Stations used
41

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 2.958 km ESE of Atka, Alaska · 2030 days ago · 10 km deep · 98 km away
  2. 3.8182 km ESE of Atka, Alaska · 2024 days ago · 35 km deep · 69 km away
  3. 2.183 km SSE of Atka, Alaska · 2023 days ago · 13 km deep · 84 km away
  4. 2.6121 km SSE of Atka, Alaska · 2017 days ago · 35 km deep · 92 km away
  5. 2.990 km SE of Atka, Alaska · 2017 days ago · 35 km deep · 66 km away
  6. 2.9177 km SE of Atka, Alaska · 2015 days ago · 25 km deep · 22 km away
  7. 4.276 km ESE of Atka, Alaska · 1999 days ago · 189 km deep · 82 km away
  8. 2.163 km ESE of Atka, Alaska · 1998 days ago · 24 km deep · 94 km away
  9. 2.7139 km SE of Atka, Alaska · 1996 days ago · 10 km deep · 17 km away
  10. 1.978 km SSE of Atka, Alaska · 1989 days ago · 17 km deep · 91 km away
  11. 2.9149 km E of Atka, Alaska · 1988 days ago · 35 km deep · 86 km away
  12. 3.1153 km E of Atka, Alaska · 1987 days ago · 20 km deep · 78 km away
  13. 4.0163 km SE of Atka, Alaska · 1985 days ago · 26 km deep · 16 km away
  14. 3.168 km SE of Atka, Alaska · 1983 days ago · 35 km deep · 88 km away
  15. 2.5191 km SSE of Atka, Alaska · 1982 days ago · 10 km deep · 69 km away
  16. 1.978 km SE of Atka, Alaska · 1981 days ago · 12 km deep · 77 km away
  17. 2.194 km SE of Atka, Alaska · 1977 days ago · 18 km deep · 65 km away
  18. 3.7126 km SSE of Atka, Alaska · 1975 days ago · 38 km deep · 71 km away

Before

  1. 3.798 km ESE of Atka, Alaska · 2032 days ago · 45 km deep · 76 km away
  2. 2.967 km ESE of Atka, Alaska · 2039 days ago · 54 km deep · 91 km away
  3. 3.3129 km SE of Atka, Alaska · 2043 days ago · 35 km deep · 26 km away
  4. 2.6107 km SE of Atka, Alaska · 2045 days ago · 35 km deep · 49 km away
  5. 2.673 km SE of Atka, Alaska · 2045 days ago · 55 km deep · 85 km away
  6. 2.365 km SE of Atka, Alaska · 2046 days ago · 90 km deep · 92 km away
  7. 3.070 km SE of Atka, Alaska · 2051 days ago · 35 km deep · 85 km away
  8. 3.6147 km E of Atka, Alaska · 2051 days ago · 34 km deep · 82 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000diti (also filed as ak0212zv6jd0). Read Sun, Sep 27, 2026, 4:25 AM UTC.