Alaska earthquakes

M2.0 earthquake 171 km S of Adak, Alaska

A magnitude 2.0 earthquake struck 171 km S of Adak, Alaska on Mon, Aug 21, 2017, 6:52 AM HADT (15:52 UTC), 68 km (42 mi) below the surface.

A larger quake followed: M3.3 201 km S of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
2.0 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2017-08-21 15:52:33 UTC
Depth
67.8 km (42.1 mi), shallow
Epicenter
50.349° N, 176.938° 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
10

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.8155 km SSE of Adak, Alaska · 3324 days ago · 10 km deep · 77 km away
  2. 3.3201 km S of Adak, Alaska · 3319 days ago · 10 km deep · 31 km away
  3. 2.3161 km S of Adak, Alaska · 3309 days ago · 38 km deep · 10 km away
  4. 2.9171 km S of Adak, Alaska · 3287 days ago · 10 km deep · 46 km away
  5. 2.5194 km SSW of Adak, Alaska · 3283 days ago · 32 km deep · 62 km away
  6. 2.981 km S of Adak, Alaska · 3282 days ago · 17 km deep · 94 km away

Before

  1. 2.9214 km SSW of Adak, Alaska · 3334 days ago · 43 km deep · 46 km away
  2. 2.5166 km S of Adak, Alaska · 3350 days ago · 10 km deep · 27 km away
  3. 1.7169 km SW of Adak, Alaska · 3350 days ago · 8 km deep · 98 km away
  4. 2.7178 km SSE of Adak, Alaska · 3354 days ago · 10 km deep · 66 km away
  5. 2.990 km SSE of Adak, Alaska · 3357 days ago · 26 km deep · 96 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017aplgkx9. Read Fri, Oct 2, 2026, 8:10 AM UTC.