Alaska earthquakes

M3.4 earthquake 101 km ENE of Atka, Alaska

A magnitude 3.4 earthquake struck 101 km ENE of Atka, Alaska on Wed, Dec 30, 2020, 2:12 AM HAST (12:12 UTC), 186 km (116 mi) below the surface.

A larger quake followed: M3.6 147 km E 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
2020-12-30 12:12:11 UTC
Depth
186.2 km (115.7 mi), intermediate-depth
Epicenter
52.643° N, 172.906° 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 18.0 km horizontally, 11.8 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
164°
Stations used
29

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 2.539 km E of Atka, Alaska · 2091 days ago · 113 km deep · 68 km away
  2. 3.4120 km ESE of Atka, Alaska · 2090 days ago · 35 km deep · 94 km away
  3. 2.765 km ENE of Atka, Alaska · 2086 days ago · 139 km deep · 36 km away
  4. 1.535 km SE of Atka, Alaska · 2075 days ago · 24 km deep · 98 km away
  5. 1.972 km ESE of Atka, Alaska · 2074 days ago · 34 km deep · 80 km away
  6. 3.436 km E of Atka, Alaska · 2066 days ago · 14 km deep · 70 km away
  7. 3.128 km ESE of Atka, Alaska · 2061 days ago · 95 km deep · 92 km away
  8. 2.136 km E of Atka, Alaska · 2056 days ago · 156 km deep · 77 km away
  9. 2.141 km NNE of Atka, Alaska · 2056 days ago · 153 km deep · 73 km away
  10. 3.6147 km E of Atka, Alaska · 2050 days ago · 34 km deep · 90 km away
  11. 1.544 km SE of Atka, Alaska · 2046 days ago · 5 km deep · 99 km away
  12. 3.028 km E of Atka, Alaska · 2044 days ago · 181 km deep · 77 km away
  13. 2.967 km ESE of Atka, Alaska · 2039 days ago · 54 km deep · 86 km away
  14. 2.97 km E of Atka, Alaska · 2037 days ago · 183 km deep · 95 km away

Before

  1. 2.956 km NE of Atka, Alaska · 2097 days ago · 201 km deep · 45 km away
  2. 1.618 km ENE of Atka, Alaska · 2097 days ago · 10 km deep · 83 km away
  3. 2.9Andreanof Islands, Aleutian Islands, Alaska · 2098 days ago · 175 km deep · 65 km away
  4. 3.666 km E of Atka, Alaska · 2104 days ago · 102 km deep · 56 km away
  5. 3.1Andreanof Islands, Aleutian Islands, Alaska · 2107 days ago · 128 km deep · 68 km away
  6. 3.137 km ESE of Atka, Alaska · 2107 days ago · 128 km deep · 83 km away
  7. 2.6144 km NE of Atka, Alaska · 2112 days ago · 145 km deep · 45 km away
  8. 4.562 km N of Atka, Alaska · 2113 days ago · 182 km deep · 82 km away
  9. 2.786 km E of Atka, Alaska · 2115 days ago · 112 km deep · 61 km away
  10. 3.2142 km ESE of Atka, Alaska · 2118 days ago · 35 km deep · 96 km away
  11. 2.631 km N of Atka, Alaska · 2122 days ago · 170 km deep · 85 km away
  12. 3.6138 km E of Atka, Alaska · 2124 days ago · 103 km deep · 55 km away
  13. 4.1147 km E of Atka, Alaska · 2124 days ago · 34 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000d7m4 (also filed as ak020grudgva). Read Sat, Sep 26, 2026, 3:50 PM UTC.