Alaska earthquakes

M3.1 earthquake 163 km S of Atka, Alaska

A magnitude 3.1 earthquake struck 163 km S of Atka, Alaska on Fri, Mar 3, 2023, 1:29 PM HAST (23:29 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.6 164 km S of Atka, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude
3.1 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-03-03 23:29:34 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.730° N, 174.175° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.ScaleComputed byNotes
3.1ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.128 · 8 stations
2.8ML, local (Richter)Alaska Earthquake CenterPreliminary

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 8.9 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
332°, poorly surrounded by stations
Stations used
11

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 3.5158 km S of Atka, Alaska · 1296 days ago · 10 km deep · 11 km away
  2. 2.7172 km S of Atka, Alaska · 1295 days ago · 10 km deep · 27 km away
  3. 2.8121 km SSE of Atka, Alaska · 1295 days ago · 10 km deep · 63 km away
  4. 2.6128 km S of Atka, Alaska · 1294 days ago · 10 km deep · 35 km away
  5. 2.9112 km SE of Atka, Alaska · 1293 days ago · 35 km deep · 97 km away
  6. 3.4Andreanof Islands, Aleutian Islands, Alaska · 1291 days ago · 10 km deep · 51 km away
  7. 2.3Andreanof Islands, Aleutian Islands, Alaska · 1289 days ago · 11 km deep · 98 km away
  8. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1282 days ago · 20 km deep · 71 km away
  9. 2.9149 km SSE of Atka, Alaska · 1271 days ago · 10 km deep · 33 km away
  10. 3.2Andreanof Islands, Aleutian Islands, Alaska · 1268 days ago · 4 km deep · 43 km away
  11. 3.0119 km SSW of Atka, Alaska · 1263 days ago · 31 km deep · 79 km away
  12. 4.6164 km S of Atka, Alaska · 1259 days ago · 10 km deep · 24 km away
  13. 3.1162 km S of Atka, Alaska · 1255 days ago · 10 km deep · 21 km away
  14. 2.6152 km SE of Adak, Alaska · 1254 days ago · 10 km deep · 70 km away

Before

  1. 3.2140 km SSE of Atka, Alaska · 1308 days ago · 10 km deep · 73 km away
  2. 3.4184 km SSE of Atka, Alaska · 1311 days ago · 10 km deep · 57 km away
  3. 2.7Andreanof Islands, Aleutian Islands, Alaska · 1331 days ago · 10 km deep · 24 km away
  4. 2.9196 km SSE of Atka, Alaska · 1331 days ago · 10 km deep · 85 km away
  5. 3.1187 km SSE of Atka, Alaska · 1332 days ago · 10 km deep · 90 km away
  6. 2.3123 km SSE of Atka, Alaska · 1332 days ago · 20 km deep · 58 km away
  7. 4.3177 km SSE of Atka, Alaska · 1333 days ago · 10 km deep · 59 km away
  8. 2.2156 km SE of Adak, Alaska · 1333 days ago · 24 km deep · 70 km away
  9. 3.1172 km S of Atka, Alaska · 1335 days ago · 10 km deep · 30 km away
  10. 2.8Andreanof Islands, Aleutian Islands, Alaska · 1335 days ago · 10 km deep · 44 km away
  11. 3.2162 km SSE of Atka, Alaska · 1335 days ago · 10 km deep · 63 km away
  12. 2.9Andreanof Islands, Aleutian Islands, Alaska · 1338 days ago · 10 km deep · 21 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000jib2 (also filed as ak0232ux6t9v). Read Fri, Oct 2, 2026, 3:17 AM UTC.