Alaska earthquakes

M4.4 earthquake 161 km S of False Pass, Alaska

A magnitude 4.4 earthquake struck 161 km S of False Pass, Alaska on Wed, Jan 18, 2023, 9:43 PM AKST (06:43 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M4.9 161 km S of False Pass, 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
4.4 (mwr), light
Local time
UTC
2023-01-19 06:43:44 UTC
Depth
20.4 km (12.7 mi), shallow
Epicenter
53.407° N, 163.569° W
Region
Alaska
Strongest shaking
I, not felt shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
I, not felt shaking
Peak ground acceleration
0.0% of gravity
Peak ground velocity
-3.9 cm/s
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting
Strike-slip
Moment magnitude
4.4 Mwr
Nodal plane 1
Strike 157°, dip 19°, rake -8°
Nodal plane 2
Strike 255°, dip 87°, rake -108°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 5.0 km horizontally, 3.7 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
167°
Stations used
120

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 117 in the 60 days after this one and 72 in the 30 days before it.

After

  1. 2.9Unimak Island region, Alaska · 1347 days ago · 35 km deep · 8 km away
  2. 4.2152 km S of False Pass, Alaska · 1347 days ago · 24 km deep · 9 km away
  3. 2.7163 km S of False Pass, Alaska · 1347 days ago · 35 km deep · 4 km away
  4. 4.9161 km S of False Pass, Alaska · 1347 days ago · 9 km deep · 1 km away · felt by 1
  5. 2.4160 km S of False Pass, Alaska · 1347 days ago · 21 km deep · 2 km away
  6. 3.3155 km S of False Pass, Alaska · 1347 days ago · 34 km deep · 6 km away
  7. 2.3160 km S of False Pass, Alaska · 1347 days ago · 35 km deep · 5 km away
  8. 2.6151 km S of False Pass, Alaska · 1347 days ago · 35 km deep · 13 km away
  9. 3.2156 km S of False Pass, Alaska · 1347 days ago · 35 km deep · 6 km away
  10. 2.6164 km S of False Pass, Alaska · 1347 days ago · 35 km deep · 5 km away
  11. 3.1168 km S of False Pass, Alaska · 1347 days ago · 35 km deep · 12 km away
  12. 2.2173 km S of False Pass, Alaska · 1347 days ago · 35 km deep · 16 km away
  13. 2.194 km SE of Akutan, Alaska · 1347 days ago · 18 km deep · 74 km away
  14. 2.5102 km SE of Akutan, Alaska · 1347 days ago · 35 km deep · 69 km away
  15. 2.7157 km S of False Pass, Alaska · 1347 days ago · 35 km deep · 6 km away
  16. 2.9162 km S of False Pass, Alaska · 1346 days ago · 35 km deep · 2 km away
  17. 2.6165 km S of False Pass, Alaska · 1346 days ago · 35 km deep · 7 km away
  18. 2.9166 km S of False Pass, Alaska · 1346 days ago · 31 km deep · 5 km away
  19. 2.073 km E of Akutan, Alaska · 1346 days ago · 26 km deep · 100 km away
  20. 3.2163 km S of False Pass, Alaska · 1346 days ago · 35 km deep · 2 km away
  21. 2.8163 km S of False Pass, Alaska · 1346 days ago · 35 km deep · 4 km away
  22. 2.7158 km S of False Pass, Alaska · 1345 days ago · 35 km deep · 4 km away
  23. 4.6Unimak Island region, Alaska · 1345 days ago · 29 km deep · 10 km away
  24. 3.7Unimak Island region, Alaska · 1345 days ago · 24 km deep · 6 km away
  25. 2.6162 km S of False Pass, Alaska · 1345 days ago · 25 km deep · 1 km away
  26. 3.0112 km SSW of False Pass, Alaska · 1345 days ago · 35 km deep · 57 km away
  27. 4.2159 km S of False Pass, Alaska · 1345 days ago · 35 km deep · 7 km away
  28. 2.9Unimak Island region, Alaska · 1345 days ago · 35 km deep · 8 km away
  29. 3.0165 km S of False Pass, Alaska · 1345 days ago · 35 km deep · 4 km away
  30. 2.8170 km S of False Pass, Alaska · 1345 days ago · 35 km deep · 9 km away
  31. 2.8Unimak Island region, Alaska · 1345 days ago · 35 km deep · 8 km away
  32. 2.568 km S of False Pass, Alaska · 1345 days ago · 35 km deep · 96 km away
  33. 3.3163 km S of False Pass, Alaska · 1345 days ago · 35 km deep · 4 km away
  34. 2.996 km S of False Pass, Alaska · 1344 days ago · 35 km deep · 69 km away
  35. 2.9149 km S of False Pass, Alaska · 1344 days ago · 35 km deep · 13 km away
  36. 3.1111 km ESE of Akutan, Alaska · 1343 days ago · 35 km deep · 62 km away
  37. 2.2164 km S of False Pass, Alaska · 1343 days ago · 35 km deep · 3 km away
  38. 2.5167 km S of False Pass, Alaska · 1342 days ago · 35 km deep · 7 km away
  39. 2.6155 km S of False Pass, Alaska · 1342 days ago · 17 km deep · 6 km away
  40. 2.6Unimak Island region, Alaska · 1342 days ago · 25 km deep · 6 km away
  41. 2.6152 km S of False Pass, Alaska · 1342 days ago · 35 km deep · 10 km away
  42. 2.8168 km S of False Pass, Alaska · 1342 days ago · 35 km deep · 7 km away
  43. 2.1102 km SSW of False Pass, Alaska · 1341 days ago · 67 km deep · 75 km away
  44. 2.5111 km SSW of False Pass, Alaska · 1341 days ago · 35 km deep · 55 km away
  45. 2.2Unimak Island region, Alaska · 1340 days ago · 26 km deep · 57 km away
  46. 2.9146 km S of False Pass, Alaska · 1339 days ago · 35 km deep · 15 km away
  47. 2.7152 km S of False Pass, Alaska · 1338 days ago · 15 km deep · 9 km away
  48. 2.5162 km S of False Pass, Alaska · 1338 days ago · 35 km deep · 2 km away
  49. 2.6160 km S of False Pass, Alaska · 1337 days ago · 35 km deep · 1 km away
  50. 2.694 km S of False Pass, Alaska · 1337 days ago · 35 km deep · 66 km away
  51. 2.195 km SSW of False Pass, Alaska · 1337 days ago · 56 km deep · 82 km away
  52. 3.188 km ESE of Akutan, Alaska · 1336 days ago · 35 km deep · 78 km away
  53. 2.9Unimak Island region, Alaska · 1336 days ago · 10 km deep · 13 km away
  54. 2.4Unimak Island region, Alaska · 1334 days ago · 16 km deep · 7 km away
  55. 2.3161 km S of False Pass, Alaska · 1334 days ago · 26 km deep · 0 km away
  56. 2.7168 km S of False Pass, Alaska · 1334 days ago · 35 km deep · 14 km away
  57. 2.6169 km S of False Pass, Alaska · 1333 days ago · 23 km deep · 12 km away
  58. 2.8Unimak Island region, Alaska · 1333 days ago · 35 km deep · 11 km away
  59. 2.8164 km S of False Pass, Alaska · 1332 days ago · 35 km deep · 4 km away
  60. 2.187 km S of False Pass, Alaska · 1330 days ago · 43 km deep · 74 km away

The first 60 of 117.

Before

  1. 2.188 km S of False Pass, Alaska · 1348 days ago · 26 km deep · 76 km away
  2. 2.1100 km ESE of Akutan, Alaska · 1349 days ago · 41 km deep · 77 km away
  3. 1.9107 km ESE of Akutan, Alaska · 1350 days ago · 18 km deep · 72 km away
  4. 2.3Unimak Island region, Alaska · 1350 days ago · 35 km deep · 65 km away
  5. 2.088 km E of Akutan, Alaska · 1350 days ago · 58 km deep · 97 km away
  6. 2.6south of Alaska · 1350 days ago · 10 km deep · 98 km away
  7. 3.1Unimak Island region, Alaska · 1352 days ago · 35 km deep · 35 km away
  8. 2.0Unimak Island region, Alaska · 1352 days ago · 17 km deep · 60 km away
  9. 2.7238 km S of False Pass, Alaska · 1352 days ago · 10 km deep · 85 km away
  10. 2.5142 km SE of Akutan, Alaska · 1353 days ago · 23 km deep · 56 km away
  11. 2.1125 km SSW of False Pass, Alaska · 1354 days ago · 26 km deep · 47 km away
  12. 1.9107 km SSW of False Pass, Alaska · 1354 days ago · 26 km deep · 62 km away
  13. 2.287 km SE of Akutan, Alaska · 1354 days ago · 26 km deep · 84 km away
  14. 2.074 km SE of Akutan, Alaska · 1354 days ago · 26 km deep · 94 km away
  15. 2.288 km SE of Akutan, Alaska · 1354 days ago · 30 km deep · 83 km away
  16. 2.1110 km SSW of False Pass, Alaska · 1355 days ago · 41 km deep · 59 km away
  17. 2.174 km ESE of Akutan, Alaska · 1355 days ago · 37 km deep · 98 km away
  18. 2.5120 km ESE of Akutan, Alaska · 1355 days ago · 39 km deep · 46 km away
  19. 2.095 km SSW of False Pass, Alaska · 1355 days ago · 26 km deep · 68 km away
  20. 2.5146 km SSE of False Pass, Alaska · 1355 days ago · 21 km deep · 54 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000j5fb (also filed as ak023vj1ie2). Read Sun, Sep 27, 2026, 1:04 PM UTC.