Alaska earthquakes

M3.4 earthquake 120 km ESE of Atka, Alaska

A magnitude 3.4 earthquake struck 120 km ESE of Atka, Alaska on Tue, Jan 5, 2021, 8:23 AM HAST (18:23 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M3.7 98 km ESE of Atka, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude
3.4 (ml), minor
Local time
UTC
2021-01-05 18:23:20 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.831° N, 172.541° 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 6.6 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
210°, poorly surrounded by stations
Stations used
40

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 2.684 km SSE of Atka, Alaska · 2090 days ago · 147 km deep · 91 km away
  2. 2.765 km ENE of Atka, Alaska · 2086 days ago · 139 km deep · 96 km away
  3. 1.974 km SE of Atka, Alaska · 2082 days ago · 12 km deep · 64 km away
  4. 2.165 km SE of Atka, Alaska · 2079 days ago · 28 km deep · 67 km away
  5. 1.535 km SE of Atka, Alaska · 2076 days ago · 24 km deep · 90 km away
  6. 1.972 km ESE of Atka, Alaska · 2074 days ago · 34 km deep · 49 km away
  7. 3.436 km E of Atka, Alaska · 2066 days ago · 14 km deep · 89 km away
  8. 3.128 km ESE of Atka, Alaska · 2061 days ago · 95 km deep · 93 km away
  9. 2.136 km E of Atka, Alaska · 2056 days ago · 156 km deep · 84 km away
  10. 3.6147 km E of Atka, Alaska · 2050 days ago · 34 km deep · 38 km away
  11. 3.070 km SE of Atka, Alaska · 2050 days ago · 35 km deep · 63 km away
  12. 1.544 km SE of Atka, Alaska · 2046 days ago · 5 km deep · 83 km away
  13. 2.365 km SE of Atka, Alaska · 2045 days ago · 90 km deep · 72 km away
  14. 2.673 km SE of Atka, Alaska · 2045 days ago · 55 km deep · 68 km away
  15. 2.6107 km SE of Atka, Alaska · 2045 days ago · 35 km deep · 49 km away
  16. 3.028 km E of Atka, Alaska · 2044 days ago · 181 km deep · 95 km away
  17. 3.3129 km SE of Atka, Alaska · 2043 days ago · 35 km deep · 44 km away
  18. 2.967 km ESE of Atka, Alaska · 2039 days ago · 54 km deep · 55 km away
  19. 2.246 km SSE of Atka, Alaska · 2036 days ago · 49 km deep · 94 km away
  20. 3.798 km ESE of Atka, Alaska · 2032 days ago · 45 km deep · 24 km away

Before

  1. 2.539 km E of Atka, Alaska · 2092 days ago · 113 km deep · 85 km away
  2. 3.4101 km ENE of Atka, Alaska · 2096 days ago · 186 km deep · 94 km away
  3. 2.956 km NE of Atka, Alaska · 2097 days ago · 201 km deep · 99 km away
  4. 3.666 km E of Atka, Alaska · 2104 days ago · 102 km deep · 61 km away
  5. 3.6213 km ESE of Atka, Alaska · 2106 days ago · 25 km deep · 93 km away
  6. 3.1Andreanof Islands, Aleutian Islands, Alaska · 2107 days ago · 128 km deep · 47 km away
  7. 3.137 km ESE of Atka, Alaska · 2107 days ago · 128 km deep · 83 km away
  8. 1.931 km SSE of Atka, Alaska · 2111 days ago · 17 km deep · 98 km away
  9. 2.786 km E of Atka, Alaska · 2115 days ago · 112 km deep · 40 km away
  10. 3.2142 km ESE of Atka, Alaska · 2118 days ago · 35 km deep · 26 km away
  11. 2.7100 km SE of Atka, Alaska · 2119 days ago · 12 km deep · 56 km away
  12. 2.9135 km ESE of Atka, Alaska · 2119 days ago · 103 km deep · 15 km away
  13. 3.0Andreanof Islands, Aleutian Islands, Alaska · 2120 days ago · 12 km deep · 67 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000d5vr (also filed as ak0218kjjg9). Read Sat, Sep 26, 2026, 6:27 PM UTC.