Alaska earthquakes

M3.0 earthquake 199 km S of Unalaska, Alaska

A magnitude 3.0 earthquake struck 199 km S of Unalaska, Alaska on Tue, Jan 31, 2023, 9:28 PM AKST (06:28 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M3.8 142 km S of Unalaska, 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
3.0 (ml), minor
Local time
UTC
2023-02-01 06:28:50 UTC
Depth
7.3 km (4.6 mi), shallow
Epicenter
52.103° N, 166.083° 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 7.1 km horizontally, 15.1 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
272°, poorly surrounded by stations
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.1134 km S of Unalaska, Alaska · 1332 days ago · 14 km deep · 79 km away
  2. 2.9Fox Islands, Aleutian Islands, Alaska · 1332 days ago · 10 km deep · 53 km away
  3. 2.3162 km SSE of Unalaska, Alaska · 1330 days ago · 5 km deep · 84 km away
  4. 1.9133 km S of Unalaska, Alaska · 1330 days ago · 6 km deep · 75 km away
  5. 2.3194 km SSE of Unalaska, Alaska · 1329 days ago · 21 km deep · 44 km away
  6. 2.2132 km ESE of Nikolski, Alaska · 1326 days ago · 10 km deep · 86 km away
  7. 2.3131 km SSW of Unalaska, Alaska · 1323 days ago · 11 km deep · 89 km away
  8. 2.7200 km ESE of Nikolski, Alaska · 1319 days ago · 10 km deep · 15 km away
  9. 2.9202 km ESE of Nikolski, Alaska · 1318 days ago · 10 km deep · 15 km away
  10. 2.5129 km ESE of Nikolski, Alaska · 1315 days ago · 10 km deep · 83 km away
  11. 2.7Fox Islands, Aleutian Islands, Alaska · 1306 days ago · 10 km deep · 83 km away
  12. 3.8142 km S of Unalaska, Alaska · 1302 days ago · 25 km deep · 59 km away
  13. 2.5147 km S of Unalaska, Alaska · 1302 days ago · 26 km deep · 53 km away
  14. 2.0129 km ESE of Nikolski, Alaska · 1301 days ago · 13 km deep · 87 km away
  15. 3.3118 km ESE of Nikolski, Alaska · 1301 days ago · 35 km deep · 93 km away
  16. 2.6Fox Islands, Aleutian Islands, Alaska · 1295 days ago · 10 km deep · 73 km away
  17. 2.3116 km ESE of Nikolski, Alaska · 1294 days ago · 22 km deep · 94 km away
  18. 2.0137 km S of Unalaska, Alaska · 1286 days ago · 26 km deep · 72 km away
  19. 2.9197 km SSE of Unalaska, Alaska · 1279 days ago · 20 km deep · 32 km away
  20. 2.1168 km SE of Nikolski, Alaska · 1278 days ago · 32 km deep · 58 km away

Before

  1. 2.1137 km S of Unalaska, Alaska · 1343 days ago · 9 km deep · 69 km away
  2. 2.4189 km S of Unalaska, Alaska · 1359 days ago · 10 km deep · 12 km away
  3. 2.7191 km SSE of Unalaska, Alaska · 1363 days ago · 10 km deep · 38 km away
  4. 2.5194 km SSE of Unalaska, Alaska · 1365 days ago · 18 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000jn6c (also filed as ak0231h0xteq). Read Wed, Sep 30, 2026, 5:57 AM UTC.