Alaska earthquakes

M3.7 earthquake 230 km W of Adak, Alaska

A magnitude 3.7 earthquake struck 230 km W of Adak, Alaska on Sun, Jan 3, 2021, 3:45 AM HAST (13:45 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.8 184 km WSW of Adak, 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
3.7 (mb), minor
Local time
UTC
2021-01-03 13:45:38 UTC
Depth
5.7 km (3.5 mi), shallow
Epicenter
51.727° N, 179.966° 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 15.9 km horizontally, 12.2 km in depth
Magnitude uncertainty
±0.36
Depth from
From location
Station coverage gap
223°, poorly surrounded by stations
Stations used
14

Nearby

Within 100 km, magnitude 1.5 and up: 60 in the 60 days after this one and 32 in the 30 days before it.

After

  1. 4.0231 km WSW of Adak, Alaska · 2090 days ago · 35 km deep · 60 km away
  2. 2.1176 km WSW of Adak, Alaska · 2089 days ago · 76 km deep · 62 km away
  3. 2.3241 km WSW of Adak, Alaska · 2089 days ago · 47 km deep · 73 km away
  4. 2.9253 km WSW of Adak, Alaska · 2089 days ago · 35 km deep · 58 km away
  5. 3.2241 km WSW of Adak, Alaska · 2088 days ago · 23 km deep · 66 km away
  6. 4.6Rat Islands, Aleutian Islands, Alaska · 2088 days ago · 35 km deep · 97 km away
  7. 3.1245 km WSW of Adak, Alaska · 2088 days ago · 10 km deep · 81 km away
  8. 1.9185 km WSW of Adak, Alaska · 2088 days ago · 12 km deep · 62 km away
  9. 2.6253 km WSW of Adak, Alaska · 2087 days ago · 35 km deep · 80 km away
  10. 2.6247 km WSW of Adak, Alaska · 2087 days ago · 10 km deep · 100 km away
  11. 3.5210 km WSW of Adak, Alaska · 2087 days ago · 35 km deep · 76 km away
  12. 4.1193 km WSW of Adak, Alaska · 2087 days ago · 28 km deep · 84 km away
  13. 3.2250 km WSW of Adak, Alaska · 2087 days ago · 35 km deep · 77 km away
  14. 3.6240 km WSW of Adak, Alaska · 2086 days ago · 24 km deep · 60 km away
  15. 2.9258 km WSW of Adak, Alaska · 2086 days ago · 33 km deep · 67 km away
  16. 2.8205 km WSW of Adak, Alaska · 2085 days ago · 35 km deep · 78 km away
  17. 2.0231 km WSW of Adak, Alaska · 2085 days ago · 8 km deep · 75 km away
  18. 4.6Rat Islands, Aleutian Islands, Alaska · 2084 days ago · 97 km deep · 95 km away
  19. 4.0195 km WNW of Adak, Alaska · 2077 days ago · 211 km deep · 76 km away
  20. 1.8172 km W of Adak, Alaska · 2075 days ago · 11 km deep · 58 km away
  21. 2.7157 km WSW of Adak, Alaska · 2073 days ago · 17 km deep · 99 km away
  22. 2.3188 km W of Adak, Alaska · 2073 days ago · 95 km deep · 53 km away
  23. 2.1194 km W of Adak, Alaska · 2072 days ago · 89 km deep · 38 km away
  24. 1.9131 km W of Adak, Alaska · 2071 days ago · 94 km deep · 99 km away
  25. 2.1162 km W of Adak, Alaska · 2071 days ago · 92 km deep · 69 km away
  26. 4.0Rat Islands, Aleutian Islands, Alaska · 2068 days ago · 48 km deep · 86 km away
  27. 3.9Rat Islands, Aleutian Islands, Alaska · 2066 days ago · 79 km deep · 84 km away
  28. 2.1131 km W of Adak, Alaska · 2064 days ago · 115 km deep · 98 km away
  29. 2.7243 km WSW of Adak, Alaska · 2063 days ago · 21 km deep · 72 km away
  30. 2.8252 km WSW of Adak, Alaska · 2061 days ago · 35 km deep · 73 km away
  31. 1.9178 km WSW of Adak, Alaska · 2061 days ago · 1 km deep · 60 km away
  32. 1.9149 km WSW of Adak, Alaska · 2058 days ago · 10 km deep · 95 km away
  33. 3.0242 km WSW of Adak, Alaska · 2051 days ago · 13 km deep · 78 km away
  34. 4.1265 km W of Adak, Alaska · 2050 days ago · 175 km deep · 56 km away
  35. 4.8184 km WSW of Adak, Alaska · 2048 days ago · 23 km deep · 61 km away
  36. 3.3Andreanof Islands, Aleutian Islands, Alaska · 2048 days ago · 35 km deep · 70 km away
  37. 3.5173 km WSW of Adak, Alaska · 2047 days ago · 10 km deep · 64 km away
  38. 2.5193 km WSW of Adak, Alaska · 2044 days ago · 27 km deep · 74 km away
  39. 3.8212 km WSW of Adak, Alaska · 2043 days ago · 31 km deep · 88 km away
  40. 2.8224 km WSW of Adak, Alaska · 2043 days ago · 26 km deep · 98 km away
  41. 4.6199 km WSW of Adak, Alaska · 2043 days ago · 35 km deep · 88 km away · felt by 1
  42. 3.5218 km WSW of Adak, Alaska · 2043 days ago · 10 km deep · 99 km away
  43. 4.1236 km WSW of Adak, Alaska · 2043 days ago · 10 km deep · 98 km away
  44. 3.8237 km WSW of Adak, Alaska · 2043 days ago · 23 km deep · 99 km away
  45. 3.0208 km WSW of Adak, Alaska · 2043 days ago · 16 km deep · 92 km away
  46. 3.9180 km WSW of Adak, Alaska · 2043 days ago · 37 km deep · 94 km away
  47. 2.1204 km WSW of Adak, Alaska · 2043 days ago · 8 km deep · 97 km away
  48. 3.1234 km WSW of Adak, Alaska · 2043 days ago · 10 km deep · 93 km away
  49. 4.1211 km WSW of Adak, Alaska · 2042 days ago · 35 km deep · 92 km away
  50. 1.8179 km WSW of Adak, Alaska · 2042 days ago · 13 km deep · 82 km away
  51. 2.9213 km WSW of Adak, Alaska · 2042 days ago · 13 km deep · 96 km away
  52. 3.0235 km W of Adak, Alaska · 2042 days ago · 172 km deep · 52 km away
  53. 3.1267 km W of Adak, Alaska · 2041 days ago · 35 km deep · 42 km away
  54. 2.8234 km WSW of Adak, Alaska · 2040 days ago · 24 km deep · 94 km away
  55. 3.9222 km WSW of Adak, Alaska · 2040 days ago · 22 km deep · 95 km away
  56. 1.9170 km W of Adak, Alaska · 2039 days ago · 5 km deep · 60 km away
  57. 3.7255 km W of Adak, Alaska · 2036 days ago · 83 km deep · 27 km away
  58. 2.4220 km W of Adak, Alaska · 2035 days ago · 67 km deep · 28 km away
  59. 2.2191 km WSW of Adak, Alaska · 2034 days ago · 67 km deep · 62 km away
  60. 3.4213 km WSW of Adak, Alaska · 2030 days ago · 10 km deep · 82 km away

Before

  1. 4.0236 km WSW of Adak, Alaska · 2090 days ago · 31 km deep · 54 km away
  2. 3.9242 km WSW of Adak, Alaska · 2090 days ago · 35 km deep · 72 km away
  3. 3.7251 km WSW of Adak, Alaska · 2090 days ago · 10 km deep · 95 km away
  4. 6.1230 km WSW of Adak, Alaska · 2090 days ago · 21 km deep · 58 km away · felt by 3 · tsunami flag
  5. 4.1204 km WSW of Adak, Alaska · 2092 days ago · 35 km deep · 45 km away
  6. 4.3Rat Islands, Aleutian Islands, Alaska · 2093 days ago · 105 km deep · 99 km away
  7. 1.8183 km WSW of Adak, Alaska · 2094 days ago · 15 km deep · 100 km away
  8. 2.7239 km WSW of Adak, Alaska · 2095 days ago · 35 km deep · 50 km away
  9. 3.3288 km W of Adak, Alaska · 2097 days ago · 35 km deep · 58 km away
  10. 3.9191 km WSW of Adak, Alaska · 2099 days ago · 83 km deep · 61 km away
  11. 3.0183 km WSW of Adak, Alaska · 2100 days ago · 35 km deep · 95 km away
  12. 3.1253 km WSW of Adak, Alaska · 2101 days ago · 10 km deep · 76 km away
  13. 2.2148 km WSW of Adak, Alaska · 2101 days ago · 58 km deep · 96 km away
  14. 1.9152 km WSW of Adak, Alaska · 2103 days ago · 11 km deep · 87 km away
  15. 3.0254 km WSW of Adak, Alaska · 2103 days ago · 12 km deep · 74 km away
  16. 1.7156 km WSW of Adak, Alaska · 2103 days ago · 14 km deep · 84 km away
  17. 2.5240 km WSW of Adak, Alaska · 2109 days ago · 15 km deep · 36 km away
  18. 3.8289 km WSW of Adak, Alaska · 2109 days ago · 29 km deep · 92 km away
  19. 2.7192 km WSW of Adak, Alaska · 2109 days ago · 28 km deep · 65 km away
  20. 3.1241 km WSW of Adak, Alaska · 2111 days ago · 35 km deep · 45 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000d81b. Read Thu, Sep 24, 2026, 3:38 PM UTC.