Alaska earthquakes

M2.8 earthquake 187 km WSW of Nikolski, Alaska

A magnitude 2.8 earthquake struck 187 km WSW of Nikolski, Alaska on Sat, Jan 28, 2023, 5:46 AM HAST (15:46 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.2 88 km WSW of Nikolski, 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
2.8 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-01-28 15:46:59 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
52.258° N, 171.397° 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
2.8ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.105 · 12 stations
2.9ML, 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 5.1 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
203°, poorly surrounded by stations
Stations used
15

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 3.0116 km SW of Nikolski, Alaska · 1339 days ago · 35 km deep · 85 km away
  2. 2.8119 km SW of Nikolski, Alaska · 1339 days ago · 35 km deep · 78 km away
  3. 2.898 km WSW of Nikolski, Alaska · 1336 days ago · 118 km deep · 90 km away
  4. 3.1196 km ESE of Atka, Alaska · 1331 days ago · 35 km deep · 50 km away
  5. 3.1182 km SW of Nikolski, Alaska · 1331 days ago · 35 km deep · 60 km away
  6. 3.0183 km ESE of Atka, Alaska · 1327 days ago · 35 km deep · 55 km away
  7. 3.5117 km SW of Nikolski, Alaska · 1325 days ago · 35 km deep · 85 km away
  8. 2.8136 km SW of Nikolski, Alaska · 1316 days ago · 35 km deep · 76 km away
  9. 2.8137 km SW of Nikolski, Alaska · 1315 days ago · 35 km deep · 67 km away
  10. 3.4Fox Islands, Aleutian Islands, Alaska · 1315 days ago · 35 km deep · 100 km away
  11. 4.0108 km E of Atka, Alaska · 1313 days ago · 10 km deep · 83 km away
  12. 2.0112 km SW of Nikolski, Alaska · 1299 days ago · 29 km deep · 81 km away
  13. 4.288 km WSW of Nikolski, Alaska · 1295 days ago · 58 km deep · 99 km away · felt by 2
  14. 2.7116 km SW of Nikolski, Alaska · 1293 days ago · 35 km deep · 90 km away
  15. 3.8128 km WSW of Nikolski, Alaska · 1287 days ago · 35 km deep · 59 km away

Before

  1. 3.1154 km E of Atka, Alaska · 1343 days ago · 71 km deep · 37 km away
  2. 3.6129 km WSW of Nikolski, Alaska · 1343 days ago · 54 km deep · 60 km away
  3. 3.2128 km SW of Nikolski, Alaska · 1347 days ago · 35 km deep · 69 km away
  4. 3.9128 km SW of Nikolski, Alaska · 1350 days ago · 35 km deep · 66 km away
  5. 2.9124 km SW of Nikolski, Alaska · 1351 days ago · 35 km deep · 90 km away
  6. 3.7124 km WSW of Nikolski, Alaska · 1352 days ago · 35 km deep · 68 km away
  7. 3.797 km SW of Nikolski, Alaska · 1355 days ago · 52 km deep · 98 km away
  8. 3.3129 km SW of Nikolski, Alaska · 1360 days ago · 35 km deep · 65 km away
  9. 3.2186 km E of Atka, Alaska · 1360 days ago · 35 km deep · 29 km away
  10. 2.5142 km SW of Nikolski, Alaska · 1366 days ago · 35 km deep · 56 km away
  11. 3.1125 km SW of Nikolski, Alaska · 1366 days ago · 35 km deep · 83 km away
  12. 2.9137 km ENE of Atka, Alaska · 1367 days ago · 92 km deep · 62 km away
  13. 2.9136 km SW of Nikolski, Alaska · 1369 days ago · 35 km deep · 72 km away
  14. 2.9131 km W of Nikolski, Alaska · 1371 days ago · 87 km deep · 74 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000jmkf (also filed as ak0231ak979g). Read Thu, Oct 1, 2026, 9:01 PM UTC.