Alaska earthquakes

M3.0 earthquake 201 km SSE of Adak, Alaska

A magnitude 3.0 earthquake struck 201 km SSE of Adak, Alaska on Sat, Feb 19, 2022, 7:51 AM HAST (17:51 UTC), 23 km (15 mi) below the surface.

A larger quake followed: M4.3 180 km SSW of Atka, 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, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2022-02-19 17:51:23 UTC
Depth
23.5 km (14.6 mi), shallow
Epicenter
50.339° N, 175.107° 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
3.0ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.105 · 12 stations
2.6ML, 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 1.8 km horizontally, 11.1 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
241°, poorly surrounded by stations
Stations used
30

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 2.3193 km SSE of Adak, Alaska · 1682 days ago · 32 km deep · 61 km away
  2. 1.9161 km SE of Adak, Alaska · 1679 days ago · 22 km deep · 44 km away
  3. 2.1167 km SE of Adak, Alaska · 1664 days ago · 9 km deep · 43 km away
  4. 2.7142 km S of Atka, Alaska · 1656 days ago · 10 km deep · 95 km away
  5. 4.3180 km SSW of Atka, Alaska · 1655 days ago · 10 km deep · 35 km away
  6. 2.9187 km SSE of Adak, Alaska · 1645 days ago · 10 km deep · 15 km away
  7. 1.9105 km SE of Adak, Alaska · 1645 days ago · 17 km deep · 97 km away
  8. 2.6170 km SSE of Adak, Alaska · 1639 days ago · 28 km deep · 32 km away
  9. 2.5188 km SSE of Adak, Alaska · 1639 days ago · 10 km deep · 13 km away
  10. 2.3145 km S of Atka, Alaska · 1634 days ago · 7 km deep · 100 km away
  11. 2.1123 km SSW of Atka, Alaska · 1632 days ago · 26 km deep · 96 km away

Before

  1. 2.9200 km SE of Adak, Alaska · 1695 days ago · 10 km deep · 19 km away
  2. 2.1167 km S of Adak, Alaska · 1702 days ago · 24 km deep · 81 km away
  3. 2.1164 km S of Adak, Alaska · 1702 days ago · 14 km deep · 81 km away
  4. 2.8172 km S of Adak, Alaska · 1702 days ago · 10 km deep · 79 km away
  5. 3.2164 km S of Adak, Alaska · 1702 days ago · 10 km deep · 83 km away
  6. 2.3139 km S of Atka, Alaska · 1716 days ago · 10 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000h57h (also filed as ak0222azapca). Read Sun, Oct 4, 2026, 8:37 AM UTC.