Alaska earthquakes

M1.8 earthquake 186 km S of Adak, Alaska

A magnitude 1.8 earthquake struck 186 km S of Adak, Alaska on Mon, Sep 9, 2019, 2:17 PM HADT (23:17 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M4.3 241 km SSW of Adak, 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
1.8 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2019-09-09 23:17:17 UTC
Depth
12.0 km (7.5 mi), shallow
Epicenter
50.225° N, 177.099° 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
22

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 2.2198 km S of Adak, Alaska · 2579 days ago · 10 km deep · 12 km away
  2. 3.6166 km SSW of Adak, Alaska · 2579 days ago · 10 km deep · 27 km away
  3. 1.6160 km SSW of Adak, Alaska · 2579 days ago · 25 km deep · 27 km away
  4. 1.7166 km SSW of Adak, Alaska · 2579 days ago · 48 km deep · 21 km away
  5. 2.1212 km SSW of Adak, Alaska · 2554 days ago · 37 km deep · 84 km away
  6. 2.5196 km S of Adak, Alaska · 2546 days ago · 10 km deep · 28 km away
  7. 4.3241 km SSW of Adak, Alaska · 2544 days ago · 10 km deep · 88 km away
  8. 2.1136 km S of Adak, Alaska · 2529 days ago · 31 km deep · 57 km away
  9. 2.2175 km SSE of Adak, Alaska · 2521 days ago · 8 km deep · 76 km away

Before

  1. 5.4166 km SSW of Adak, Alaska · 2579 days ago · 10 km deep · 22 km away · felt by 1 · tsunami flag
  2. 3.0245 km SSW of Adak, Alaska · 2582 days ago · 35 km deep · 83 km away
  3. 1.9125 km SW of Adak, Alaska · 2589 days ago · 40 km deep · 89 km away
  4. 1.898 km S of Adak, Alaska · 2590 days ago · 42 km deep · 88 km away
  5. 2.6136 km SSW of Adak, Alaska · 2590 days ago · 10 km deep · 82 km away
  6. 2.5136 km SSW of Adak, Alaska · 2590 days ago · 10 km deep · 77 km away
  7. 2.1175 km S of Adak, Alaska · 2597 days ago · 23 km deep · 26 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak019bl585f6. Read Fri, Oct 2, 2026, 12:59 AM UTC.