Alaska earthquakes

M2.3 earthquake 166 km SSE of Atka, Alaska

A magnitude 2.3 earthquake struck 166 km SSE of Atka, Alaska on Fri, Sep 29, 2017, 11:08 PM HADT (08:08 UTC), 30 km (18 mi) below the surface.

A larger quake followed: M3.6 121 km SE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
2.3 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2017-09-30 08:08:16 UTC
Depth
29.7 km (18.5 mi), shallow
Epicenter
50.772° N, 173.458° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used
18

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.0111 km SSE of Atka, Alaska · 3288 days ago · 35 km deep · 55 km away
  2. 2.991 km SSE of Atka, Alaska · 3282 days ago · 10 km deep · 76 km away
  3. 2.3151 km SSE of Atka, Alaska · 3282 days ago · 26 km deep · 20 km away
  4. 2.086 km S of Atka, Alaska · 3272 days ago · 28 km deep · 93 km away
  5. 2.689 km SSE of Atka, Alaska · 3271 days ago · 28 km deep · 82 km away
  6. 3.6121 km SE of Atka, Alaska · 3269 days ago · 32 km deep · 71 km away
  7. 2.8150 km S of Atka, Alaska · 3269 days ago · 12 km deep · 36 km away
  8. 2.879 km SSE of Atka, Alaska · 3266 days ago · 25 km deep · 92 km away
  9. 2.5175 km SSE of Atka, Alaska · 3255 days ago · 20 km deep · 11 km away
  10. 2.687 km SE of Atka, Alaska · 3240 days ago · 38 km deep · 100 km away
  11. 3.084 km S of Atka, Alaska · 3234 days ago · 10 km deep · 98 km away

Before

  1. 1.8101 km SE of Atka, Alaska · 3289 days ago · 13 km deep · 97 km away
  2. 3.3181 km SSE of Atka, Alaska · 3295 days ago · 10 km deep · 15 km away
  3. 2.3151 km S of Atka, Alaska · 3309 days ago · 18 km deep · 55 km away
  4. 1.789 km S of Atka, Alaska · 3317 days ago · 16 km deep · 82 km away
  5. 3.979 km S of Atka, Alaska · 3317 days ago · 43 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017cjmiyn1 (also filed as ak16955365). Read Thu, Oct 1, 2026, 7:50 PM UTC.