Alaska earthquakes

M1.8 earthquake Alaska Peninsula

A magnitude 1.8 earthquake struck in the Alaska Peninsula on Tue, Feb 28, 2023, 11:04 AM AKST (20:04 UTC), -3 km (-2 mi) below the surface.

A larger quake followed: M3.5 32 km E of Port Heiden, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
1.8 (ML, local (Richter)), micro
Magnitude from
AV
Local time
UTC
2023-02-28 20:04:18 UTC
Depth
-3.1 km (-1.9 mi), shallow
Epicenter
56.904° N, 158.066° 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 0.6 km horizontally, 1.0 km in depth
Magnitude uncertainty
±0.59
Depth from
From location
Station coverage gap
250°, poorly surrounded by stations
Stations used
5

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 154 in the 60 days after this one and 55 in the 30 days before it.

After

  1. 2.130 km ESE of Port Heiden, Alaska · 1312 days ago · 2 km deep · 6 km away
  2. 1.936 km E of Port Heiden, Alaska · 1312 days ago · 3 km deep · 2 km away
  3. 1.530 km ESE of Port Heiden, Alaska · 1312 days ago · 1 km deep · 6 km away
  4. 2.036 km E of Port Heiden, Alaska · 1312 days ago · 1 km deep · 3 km away
  5. 3.132 km E of Port Heiden, Alaska · 1312 days ago · 6 km deep · 3 km away
  6. 2.135 km E of Port Heiden, Alaska · 1311 days ago · 4 km deep · 2 km away
  7. 2.536 km E of Port Heiden, Alaska · 1311 days ago · 1 km deep · 2 km away
  8. 1.736 km E of Port Heiden, Alaska · 1310 days ago · 2 km deep · 2 km away
  9. 1.627 km ESE of Port Heiden, Alaska · 1310 days ago · 2 km deep · 8 km away
  10. 1.767 km NNE of Chignik, Alaska · 1310 days ago · 3 km deep · 7 km away
  11. 2.133 km E of Port Heiden, Alaska · 1310 days ago · 0 km deep · 1 km away
  12. 1.6Alaska Peninsula · 1310 days ago · 3 km deep · 5 km away
  13. 1.730 km ESE of Port Heiden, Alaska · 1309 days ago · 1 km deep · 6 km away
  14. 2.033 km E of Port Heiden, Alaska · 1309 days ago · 0 km deep · 2 km away
  15. 1.932 km E of Port Heiden, Alaska · 1308 days ago · 2 km deep · 2 km away
  16. 2.130 km ESE of Port Heiden, Alaska · 1308 days ago · 5 km deep · 5 km away
  17. 2.130 km ESE of Port Heiden, Alaska · 1308 days ago · 4 km deep · 7 km away
  18. 2.6Alaska Peninsula · 1307 days ago · 6 km deep · 1 km away
  19. 2.036 km E of Port Heiden, Alaska · 1307 days ago · 5 km deep · 2 km away
  20. 2.129 km E of Port Heiden, Alaska · 1307 days ago · 3 km deep · 5 km away
  21. 2.528 km ESE of Port Heiden, Alaska · 1306 days ago · 1 km deep · 6 km away
  22. 1.633 km E of Port Heiden, Alaska · 1305 days ago · 1 km deep · 2 km away
  23. 1.532 km ESE of Port Heiden, Alaska · 1305 days ago · 5 km deep · 5 km away
  24. 2.252 km ESE of Chignik, Alaska · 1304 days ago · 22 km deep · 88 km away
  25. 2.132 km E of Port Heiden, Alaska · 1304 days ago · 6 km deep · 2 km away
  26. 1.834 km E of Port Heiden, Alaska · 1304 days ago · 1 km deep · 1 km away
  27. 1.869 km NNE of Chignik, Alaska · 1303 days ago · 1 km deep · 3 km away
  28. 1.931 km E of Port Heiden, Alaska · 1303 days ago · 1 km deep · 3 km away
  29. 1.629 km ESE of Port Heiden, Alaska · 1303 days ago · -3 km deep · 7 km away
  30. 2.433 km E of Port Heiden, Alaska · 1302 days ago · 1 km deep · 1 km away
  31. 2.934 km ESE of Port Heiden, Alaska · 1302 days ago · 10 km deep · 6 km away
  32. 1.795 km SSE of Ugashik, Alaska · 1301 days ago · 48 km deep · 81 km away
  33. 1.634 km E of Port Heiden, Alaska · 1300 days ago · 4 km deep · 1 km away
  34. 2.036 km E of Port Heiden, Alaska · 1299 days ago · 0 km deep · 3 km away
  35. 2.083 km S of Ugashik, Alaska · 1299 days ago · 6 km deep · 58 km away
  36. 2.056 km SE of Ugashik, Alaska · 1298 days ago · 91 km deep · 95 km away
  37. 2.134 km E of Port Heiden, Alaska · 1298 days ago · 1 km deep · 0 km away
  38. 2.033 km E of Port Heiden, Alaska · 1298 days ago · 2 km deep · 1 km away
  39. 2.0Alaska Peninsula · 1298 days ago · 3 km deep · 6 km away
  40. 2.232 km E of Port Heiden, Alaska · 1297 days ago · 3 km deep · 2 km away
  41. 1.934 km E of Port Heiden, Alaska · 1297 days ago · 4 km deep · 2 km away
  42. 2.634 km E of Port Heiden, Alaska · 1297 days ago · 5 km deep · 1 km away
  43. 2.232 km E of Port Heiden, Alaska · 1297 days ago · 1 km deep · 2 km away
  44. 2.134 km E of Port Heiden, Alaska · 1296 days ago · 0 km deep · 1 km away
  45. 2.030 km ESE of Port Heiden, Alaska · 1296 days ago · 0 km deep · 5 km away
  46. 3.031 km ESE of Port Heiden, Alaska · 1295 days ago · 7 km deep · 4 km away
  47. 1.9Alaska Peninsula · 1294 days ago · 2 km deep · 1 km away
  48. 1.831 km E of Port Heiden, Alaska · 1293 days ago · 1 km deep · 3 km away
  49. 1.936 km ESE of Port Heiden, Alaska · 1293 days ago · 2 km deep · 6 km away
  50. 1.867 km E of Chignik, Alaska · 1293 days ago · 13 km deep · 78 km away
  51. 2.034 km E of Port Heiden, Alaska · 1292 days ago · 1 km deep · 2 km away
  52. 2.032 km E of Port Heiden, Alaska · 1292 days ago · 1 km deep · 3 km away
  53. 2.274 km E of Chignik, Alaska · 1292 days ago · 3 km deep · 83 km away
  54. 2.374 km E of Chignik, Alaska · 1292 days ago · 0 km deep · 81 km away
  55. 2.831 km E of Port Heiden, Alaska · 1292 days ago · 0 km deep · 4 km away
  56. 2.130 km E of Port Heiden, Alaska · 1292 days ago · 1 km deep · 4 km away
  57. 1.731 km ESE of Port Heiden, Alaska · 1292 days ago · 2 km deep · 6 km away
  58. 1.829 km ESE of Port Heiden, Alaska · 1291 days ago · 1 km deep · 7 km away
  59. 1.938 km ESE of Port Heiden, Alaska · 1291 days ago · -3 km deep · 7 km away
  60. 1.938 km ESE of Port Heiden, Alaska · 1291 days ago · -3 km deep · 7 km away

The first 60 of 154.

Before

  1. 2.030 km ESE of Port Heiden, Alaska · 1312 days ago · 1 km deep · 5 km away
  2. 2.2Alaska Peninsula · 1313 days ago · 1 km deep · 2 km away
  3. 1.827 km ESE of Port Heiden, Alaska · 1313 days ago · 2 km deep · 7 km away
  4. 1.932 km E of Port Heiden, Alaska · 1313 days ago · 2 km deep · 2 km away
  5. 2.934 km E of Port Heiden, Alaska · 1315 days ago · 9 km deep · 2 km away
  6. 1.6Alaska Peninsula · 1315 days ago · -2 km deep · 3 km away
  7. 2.033 km E of Port Heiden, Alaska · 1315 days ago · 2 km deep · 1 km away
  8. 1.837 km E of Port Heiden, Alaska · 1316 days ago · -2 km deep · 4 km away
  9. 2.1Alaska Peninsula · 1316 days ago · 2 km deep · 3 km away
  10. 1.737 km E of Port Heiden, Alaska · 1316 days ago · -3 km deep · 4 km away
  11. 2.244 km E of Port Heiden, Alaska · 1316 days ago · 4 km deep · 10 km away
  12. 1.933 km E of Port Heiden, Alaska · 1316 days ago · 1 km deep · 2 km away
  13. 2.631 km E of Port Heiden, Alaska · 1317 days ago · 4 km deep · 3 km away
  14. 2.273 km S of Ugashik, Alaska · 1318 days ago · 84 km deep · 40 km away
  15. 1.837 km ESE of Port Heiden, Alaska · 1319 days ago · 8 km deep · 8 km away
  16. 2.033 km E of Port Heiden, Alaska · 1319 days ago · 2 km deep · 1 km away
  17. 2.235 km E of Port Heiden, Alaska · 1319 days ago · 3 km deep · 1 km away
  18. 1.937 km E of Port Heiden, Alaska · 1319 days ago · -3 km deep · 4 km away
  19. 1.837 km E of Port Heiden, Alaska · 1320 days ago · 0 km deep · 3 km away
  20. 1.540 km ESE of Port Heiden, Alaska · 1320 days ago · 2 km deep · 8 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event av91777291. Read Sat, Oct 3, 2026, 3:54 AM UTC.