Alaska earthquakes

M2.9 earthquake 193 km E of Atka, Alaska

A magnitude 2.9 earthquake struck 193 km E of Atka, Alaska on Fri, Feb 18, 2022, 12:39 AM HAST (10:39 UTC), 36 km (22 mi) below the surface.

A larger quake followed: M3.8 109 km SW 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
2.9 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2022-02-18 10:39:58 UTC
Depth
36.1 km (22.5 mi), shallow
Epicenter
51.997° N, 171.401° 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
2.9ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.105 · 12 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 4.3 km horizontally, 24.1 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
213°, poorly surrounded by stations
Stations used
18

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 2.4161 km SW of Nikolski, Alaska · 1679 days ago · 15 km deep · 45 km away
  2. 2.2Andreanof Islands, Aleutian Islands, Alaska · 1674 days ago · 29 km deep · 98 km away
  3. 2.0126 km E of Atka, Alaska · 1671 days ago · 33 km deep · 69 km away
  4. 2.4152 km E of Atka, Alaska · 1670 days ago · 67 km deep · 63 km away
  5. 3.8109 km SW of Nikolski, Alaska · 1670 days ago · 49 km deep · 96 km away
  6. 2.8191 km ESE of Atka, Alaska · 1669 days ago · 35 km deep · 20 km away
  7. 3.3171 km WSW of Nikolski, Alaska · 1662 days ago · 94 km deep · 73 km away
  8. 3.4206 km ESE of Atka, Alaska · 1662 days ago · 32 km deep · 23 km away
  9. 3.1173 km WSW of Nikolski, Alaska · 1650 days ago · 10 km deep · 31 km away
  10. 2.5174 km E of Atka, Alaska · 1648 days ago · 19 km deep · 19 km away
  11. 2.9151 km ENE of Atka, Alaska · 1646 days ago · 136 km deep · 72 km away
  12. 2.8120 km SW of Nikolski, Alaska · 1644 days ago · 35 km deep · 85 km away
  13. 2.9138 km E of Atka, Alaska · 1641 days ago · 35 km deep · 55 km away
  14. 3.3164 km SW of Nikolski, Alaska · 1638 days ago · 35 km deep · 37 km away
  15. 3.0128 km WSW of Nikolski, Alaska · 1635 days ago · 35 km deep · 74 km away
  16. 3.1206 km SW of Nikolski, Alaska · 1635 days ago · 10 km deep · 84 km away
  17. 2.2101 km ESE of Atka, Alaska · 1633 days ago · 46 km deep · 95 km away

Before

  1. 2.9139 km WSW of Nikolski, Alaska · 1694 days ago · 10 km deep · 63 km away
  2. 2.5143 km WSW of Nikolski, Alaska · 1694 days ago · 10 km deep · 64 km away
  3. 3.0Andreanof Islands, Aleutian Islands, Alaska · 1697 days ago · 10 km deep · 97 km away
  4. 2.7134 km SW of Nikolski, Alaska · 1700 days ago · 35 km deep · 75 km away
  5. 3.2213 km ESE of Atka, Alaska · 1701 days ago · 35 km deep · 39 km away
  6. 3.2187 km E of Atka, Alaska · 1702 days ago · 35 km deep · 8 km away
  7. 3.2102 km ESE of Atka, Alaska · 1703 days ago · 35 km deep · 95 km away
  8. 2.8119 km WSW of Nikolski, Alaska · 1710 days ago · 35 km deep · 82 km away
  9. 4.0234 km SW of Nikolski, Alaska · 1712 days ago · 10 km deep · 90 km away
  10. 3.2Fox Islands, Aleutian Islands, Alaska · 1712 days ago · 10 km deep · 67 km away
  11. 4.4129 km SW of Nikolski, Alaska · 1716 days ago · 35 km deep · 87 km away
  12. 3.2209 km ESE of Atka, Alaska · 1718 days ago · 35 km deep · 33 km away
  13. 3.4203 km ESE of Atka, Alaska · 1718 days ago · 38 km deep · 18 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000h4w6 (also filed as ak022297itk1). Read Sat, Oct 3, 2026, 5:54 PM UTC.