Alaska earthquakes

M2.8 earthquake 206 km SE of Atka, Alaska

A magnitude 2.8 earthquake struck 206 km SE of Atka, Alaska on Fri, Jun 9, 2023, 11:27 AM HADT (20:27 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.5 135 km SE 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
2.8 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-06-09 20:27:21 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.742° N, 172.345° 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
2.4ML, 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 7.5 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
243°, poorly surrounded by stations
Stations used
11

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.7171 km SSE of Atka, Alaska · 1211 days ago · 10 km deep · 65 km away
  2. 2.6193 km SSE of Atka, Alaska · 1211 days ago · 10 km deep · 42 km away
  3. 3.0Andreanof Islands, Aleutian Islands, Alaska · 1210 days ago · 10 km deep · 69 km away
  4. 3.9166 km SE of Atka, Alaska · 1199 days ago · 10 km deep · 41 km away
  5. 2.9149 km ESE of Atka, Alaska · 1198 days ago · 35 km deep · 81 km away
  6. 3.7190 km S of Atka, Alaska · 1187 days ago · 10 km deep · 98 km away
  7. 2.9184 km SSE of Atka, Alaska · 1175 days ago · 10 km deep · 76 km away
  8. 3.3180 km SSE of Atka, Alaska · 1168 days ago · 10 km deep · 65 km away
  9. 3.0193 km SSE of Atka, Alaska · 1165 days ago · 10 km deep · 42 km away
  10. 2.2140 km SSE of Atka, Alaska · 1162 days ago · 26 km deep · 99 km away
  11. 4.5135 km SE of Atka, Alaska · 1156 days ago · 18 km deep · 76 km away

Before

  1. 3.2163 km SSE of Atka, Alaska · 1230 days ago · 10 km deep · 95 km away
  2. 2.5189 km SSE of Atka, Alaska · 1232 days ago · 10 km deep · 57 km away
  3. 2.5112 km SE of Atka, Alaska · 1233 days ago · 35 km deep · 98 km away
  4. 3.0Andreanof Islands, Aleutian Islands, Alaska · 1236 days ago · 10 km deep · 68 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000k8tr (also filed as ak0237cy21do). Read Mon, Oct 5, 2026, 1:48 PM UTC.