Alaska earthquakes

M1.9 earthquake 150 km WSW of Adak, Alaska

A magnitude 1.9 earthquake struck 150 km WSW of Adak, Alaska on Thu, Feb 20, 2020, 4:33 PM HAST (02:33 UTC), 17 km (11 mi) below the surface.

A larger quake followed: M5.7 239 km WSW of Adak, Alaska. This one was a foreshock.

More in Alaska

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
1.9 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2020-02-21 02:33:56 UTC
Depth
16.9 km (10.5 mi), shallow
Epicenter
51.446° N, 178.693° 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.

Stations used
19

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and at least 200 in the 30 days before it.

After

  1. 1.9239 km WSW of Adak, Alaska · 2415 days ago · 13 km deep · 89 km away
  2. 1.684 km W of Adak, Alaska · 2415 days ago · 15 km deep · 73 km away
  3. 1.579 km W of Adak, Alaska · 2415 days ago · 9 km deep · 76 km away
  4. 1.6129 km W of Adak, Alaska · 2414 days ago · 7 km deep · 29 km away
  5. 5.3216 km WSW of Adak, Alaska · 2414 days ago · 10 km deep · 79 km away · tsunami flag
  6. 4.6216 km WSW of Adak, Alaska · 2414 days ago · 10 km deep · 76 km away
  7. 2.9212 km WSW of Adak, Alaska · 2414 days ago · 10 km deep · 72 km away
  8. 3.3219 km WSW of Adak, Alaska · 2414 days ago · 10 km deep · 81 km away
  9. 2.5215 km WSW of Adak, Alaska · 2414 days ago · 10 km deep · 74 km away
  10. 2.8216 km WSW of Adak, Alaska · 2414 days ago · 9 km deep · 76 km away
  11. 1.7143 km WSW of Adak, Alaska · 2414 days ago · 23 km deep · 29 km away
  12. 2.1207 km W of Adak, Alaska · 2414 days ago · 74 km deep · 64 km away
  13. 1.8113 km WSW of Adak, Alaska · 2414 days ago · 9 km deep · 38 km away
  14. 2.0124 km WSW of Adak, Alaska · 2414 days ago · 14 km deep · 31 km away
  15. 1.585 km W of Adak, Alaska · 2413 days ago · 11 km deep · 71 km away
  16. 1.580 km W of Adak, Alaska · 2413 days ago · 10 km deep · 76 km away
  17. 1.988 km W of Adak, Alaska · 2413 days ago · 5 km deep · 69 km away
  18. 1.683 km W of Adak, Alaska · 2413 days ago · 7 km deep · 73 km away
  19. 1.680 km W of Adak, Alaska · 2413 days ago · 11 km deep · 75 km away
  20. 1.898 km WSW of Adak, Alaska · 2413 days ago · 26 km deep · 59 km away
  21. 1.880 km W of Adak, Alaska · 2413 days ago · 11 km deep · 76 km away
  22. 2.282 km W of Adak, Alaska · 2412 days ago · 8 km deep · 74 km away
  23. 2.1118 km WSW of Adak, Alaska · 2412 days ago · 58 km deep · 33 km away
  24. 1.867 km WSW of Adak, Alaska · 2411 days ago · 68 km deep · 83 km away
  25. 3.4137 km WSW of Adak, Alaska · 2411 days ago · 34 km deep · 33 km away
  26. 2.1244 km WSW of Adak, Alaska · 2411 days ago · 14 km deep · 94 km away
  27. 1.789 km WSW of Adak, Alaska · 2410 days ago · 25 km deep · 64 km away
  28. 2.0154 km WSW of Adak, Alaska · 2410 days ago · 25 km deep · 36 km away
  29. 1.6Andreanof Islands, Aleutian Islands, Alaska · 2410 days ago · 10 km deep · 68 km away
  30. 2.284 km W of Adak, Alaska · 2410 days ago · 6 km deep · 72 km away
  31. 1.777 km W of Adak, Alaska · 2410 days ago · 7 km deep · 78 km away
  32. 2.1192 km WSW of Adak, Alaska · 2410 days ago · 26 km deep · 43 km away
  33. 2.7244 km WSW of Adak, Alaska · 2410 days ago · 16 km deep · 94 km away
  34. 1.678 km W of Adak, Alaska · 2410 days ago · 7 km deep · 78 km away
  35. 1.780 km W of Adak, Alaska · 2409 days ago · 6 km deep · 77 km away
  36. 1.983 km W of Adak, Alaska · 2409 days ago · 9 km deep · 75 km away
  37. 1.9130 km SW of Adak, Alaska · 2409 days ago · 22 km deep · 46 km away
  38. 2.2211 km WSW of Adak, Alaska · 2409 days ago · 74 km deep · 66 km away
  39. 1.662 km SW of Adak, Alaska · 2408 days ago · 39 km deep · 93 km away
  40. 1.6107 km WSW of Adak, Alaska · 2408 days ago · 27 km deep · 45 km away
  41. 3.688 km W of Adak, Alaska · 2408 days ago · 11 km deep · 73 km away
  42. 1.889 km W of Adak, Alaska · 2408 days ago · 5 km deep · 69 km away
  43. 1.680 km W of Adak, Alaska · 2406 days ago · 7 km deep · 76 km away
  44. 1.788 km W of Adak, Alaska · 2406 days ago · 4 km deep · 70 km away
  45. 5.7239 km WSW of Adak, Alaska · 2405 days ago · 20 km deep · 89 km away · felt by 1 · tsunami flag
  46. 3.4242 km WSW of Adak, Alaska · 2405 days ago · 13 km deep · 93 km away
  47. 2.3239 km WSW of Adak, Alaska · 2405 days ago · 28 km deep · 89 km away
  48. 2.8244 km WSW of Adak, Alaska · 2405 days ago · 15 km deep · 95 km away
  49. 2.5244 km WSW of Adak, Alaska · 2405 days ago · 10 km deep · 95 km away
  50. 2.2237 km WSW of Adak, Alaska · 2405 days ago · 13 km deep · 87 km away
  51. 2.8240 km WSW of Adak, Alaska · 2405 days ago · 10 km deep · 91 km away
  52. 2.0237 km WSW of Adak, Alaska · 2405 days ago · 14 km deep · 87 km away
  53. 4.051 km WSW of Adak, Alaska · 2404 days ago · 75 km deep · 100 km away
  54. 1.887 km W of Adak, Alaska · 2404 days ago · 3 km deep · 71 km away
  55. 2.4237 km WSW of Adak, Alaska · 2404 days ago · 16 km deep · 87 km away
  56. 3.5239 km WSW of Adak, Alaska · 2404 days ago · 10 km deep · 91 km away
  57. 2.1129 km WSW of Adak, Alaska · 2404 days ago · 66 km deep · 21 km away
  58. 5.0238 km WSW of Adak, Alaska · 2403 days ago · 10 km deep · 89 km away · felt by 2
  59. 1.787 km W of Adak, Alaska · 2403 days ago · 5 km deep · 70 km away
  60. 2.0235 km WSW of Adak, Alaska · 2403 days ago · 26 km deep · 86 km away

The first 60 of at least 199.

Before

  1. 2.055 km WSW of Adak, Alaska · 2415 days ago · 95 km deep · 95 km away
  2. 2.364 km WSW of Adak, Alaska · 2415 days ago · 68 km deep · 86 km away
  3. 2.679 km W of Adak, Alaska · 2415 days ago · 14 km deep · 73 km away
  4. 1.577 km W of Adak, Alaska · 2415 days ago · 7 km deep · 79 km away
  5. 1.782 km W of Adak, Alaska · 2415 days ago · 4 km deep · 73 km away
  6. 2.0131 km WSW of Adak, Alaska · 2415 days ago · 24 km deep · 38 km away
  7. 1.778 km W of Adak, Alaska · 2415 days ago · 7 km deep · 78 km away
  8. 2.6226 km W of Adak, Alaska · 2416 days ago · 123 km deep · 98 km away
  9. 1.9132 km WSW of Adak, Alaska · 2416 days ago · 7 km deep · 25 km away
  10. 1.988 km W of Adak, Alaska · 2416 days ago · 3 km deep · 70 km away
  11. 1.984 km W of Adak, Alaska · 2416 days ago · 10 km deep · 73 km away
  12. 2.686 km WSW of Adak, Alaska · 2416 days ago · 70 km deep · 64 km away
  13. 1.982 km W of Adak, Alaska · 2417 days ago · 8 km deep · 75 km away
  14. 2.4243 km WSW of Adak, Alaska · 2417 days ago · 15 km deep · 94 km away
  15. 1.5123 km W of Adak, Alaska · 2417 days ago · 5 km deep · 48 km away
  16. 1.677 km W of Adak, Alaska · 2417 days ago · 6 km deep · 79 km away
  17. 2.284 km W of Adak, Alaska · 2417 days ago · 5 km deep · 72 km away
  18. 1.881 km W of Adak, Alaska · 2417 days ago · 8 km deep · 74 km away
  19. 1.983 km W of Adak, Alaska · 2417 days ago · 7 km deep · 74 km away
  20. 2.082 km W of Adak, Alaska · 2417 days ago · 9 km deep · 75 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0202e1c3vk. Read Thu, Oct 1, 2026, 8:02 PM UTC.