Alaska earthquakes

M4.3 earthquake 65 km NNW of Atka, Alaska

A magnitude 4.3 earthquake struck 65 km NNW of Atka, Alaska on Fri, Feb 17, 2023, 6:30 PM HAST (04:30 UTC), 216 km (134 mi) below the surface.

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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
4.3 (mb), light
Local time
UTC
2023-02-18 04:30:05 UTC
Depth
215.8 km (134.1 mi), intermediate-depth
Epicenter
52.758° N, 174.494° W
Region
Alaska
Strongest shaking
II, weak 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
II, weak shaking
Peak ground acceleration
0.0% of gravity
Peak ground velocity
-5.3 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.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 11.1 km horizontally, 7.4 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
69°
Stations used
55

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 3.249 km ENE of Atka, Alaska · 1320 days ago · 182 km deep · 72 km away
  2. 3.928 km WNW of Atka, Alaska · 1319 days ago · 215 km deep · 47 km away
  3. 2.7Andreanof Islands, Aleutian Islands, Alaska · 1315 days ago · 20 km deep · 58 km away
  4. 3.030 km S of Atka, Alaska · 1314 days ago · 150 km deep · 95 km away
  5. 2.74 km SSE of Atka, Alaska · 1299 days ago · 115 km deep · 70 km away
  6. 1.717 km SW of Atka, Alaska · 1297 days ago · 7 km deep · 74 km away
  7. 2.917 km NE of Atka, Alaska · 1292 days ago · 152 km deep · 58 km away
  8. 3.139 km NNW of Atka, Alaska · 1283 days ago · 160 km deep · 29 km away
  9. 2.940 km SSW of Atka, Alaska · 1281 days ago · 75 km deep · 97 km away
  10. 3.043 km WSW of Atka, Alaska · 1280 days ago · 139 km deep · 76 km away
  11. 2.728 km SW of Atka, Alaska · 1279 days ago · 100 km deep · 84 km away
  12. 3.320 km NNW of Atka, Alaska · 1278 days ago · 194 km deep · 45 km away
  13. 3.175 km NW of Atka, Alaska · 1278 days ago · 204 km deep · 29 km away
  14. 3.017 km SE of Atka, Alaska · 1277 days ago · 155 km deep · 83 km away
  15. 2.629 km S of Atka, Alaska · 1277 days ago · 10 km deep · 92 km away
  16. 1.832 km ESE of Atka, Alaska · 1274 days ago · 16 km deep · 91 km away
  17. 1.976 km NE of Adak, Alaska · 1274 days ago · 140 km deep · 100 km away
  18. 1.621 km N of Atka, Alaska · 1272 days ago · 5 km deep · 47 km away
  19. 2.621 km N of Atka, Alaska · 1272 days ago · 1 km deep · 47 km away
  20. 2.221 km N of Atka, Alaska · 1272 days ago · -3 km deep · 47 km away

Before

  1. 2.56 km N of Atka, Alaska · 1321 days ago · 170 km deep · 59 km away
  2. 4.023 km NE of Atka, Alaska · 1322 days ago · 164 km deep · 56 km away
  3. 1.967 km WSW of Atka, Alaska · 1322 days ago · 26 km deep · 98 km away
  4. 1.918 km S of Atka, Alaska · 1326 days ago · 24 km deep · 83 km away
  5. 3.566 km W of Atka, Alaska · 1327 days ago · 86 km deep · 76 km away
  6. 3.322 km NW of Atka, Alaska · 1330 days ago · 194 km deep · 45 km away
  7. 2.314 km SW of Atka, Alaska · 1331 days ago · 121 km deep · 71 km away
  8. 1.829 km E of Atka, Alaska · 1331 days ago · 23 km deep · 77 km away
  9. 4.0Andreanof Islands, Aleutian Islands, Alaska · 1331 days ago · 187 km deep · 69 km away
  10. 2.056 km WSW of Atka, Alaska · 1334 days ago · 68 km deep · 96 km away
  11. 3.141 km NE of Atka, Alaska · 1339 days ago · 127 km deep · 56 km away
  12. 2.017 km S of Atka, Alaska · 1342 days ago · 24 km deep · 83 km away
  13. 3.211 km NW of Atka, Alaska · 1345 days ago · 143 km deep · 56 km away
  14. 3.433 km S of Atka, Alaska · 1349 days ago · 10 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000jpuh (also filed as ak023293w6j8). Read Wed, Sep 30, 2026, 10:36 PM UTC.