Alaska earthquakes

M2.9 earthquake 256 km SW of Adak, Alaska

A magnitude 2.9 earthquake struck 256 km SW of Adak, Alaska on Mon, Jan 13, 2020, 2:04 AM HAST (12:04 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.3 216 km WSW 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
2.9 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-01-13 12:04:02 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.097° N, 178.969° 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
2.9ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.115 · 10 stations
2.7ML, 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 5.8 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.12
Depth from
Operator assigned
Station coverage gap
267°, poorly surrounded by stations
Stations used
19

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 4.3222 km SW of Adak, Alaska · 2443 days ago · 7 km deep · 35 km away
  2. 4.6230 km SSW of Adak, Alaska · 2436 days ago · 10 km deep · 80 km away
  3. 2.8219 km WSW of Adak, Alaska · 2419 days ago · 6 km deep · 86 km away
  4. 2.8273 km SW of Adak, Alaska · 2418 days ago · 10 km deep · 37 km away
  5. 3.0294 km SW of Adak, Alaska · 2415 days ago · 10 km deep · 90 km away
  6. 5.3216 km WSW of Adak, Alaska · 2414 days ago · 10 km deep · 85 km away · tsunami flag
  7. 4.6216 km WSW of Adak, Alaska · 2414 days ago · 10 km deep · 91 km away
  8. 2.9212 km WSW of Adak, Alaska · 2414 days ago · 10 km deep · 93 km away
  9. 3.3219 km WSW of Adak, Alaska · 2414 days ago · 10 km deep · 84 km away
  10. 2.5215 km WSW of Adak, Alaska · 2414 days ago · 10 km deep · 92 km away
  11. 2.8216 km WSW of Adak, Alaska · 2414 days ago · 9 km deep · 90 km away
  12. 3.0280 km SW of Adak, Alaska · 2399 days ago · 10 km deep · 38 km away
  13. 2.6249 km SSW of Adak, Alaska · 2394 days ago · 10 km deep · 33 km away

Before

  1. 2.4242 km SSW of Adak, Alaska · 2462 days ago · 20 km deep · 51 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us60007hqq (also filed as ak020lp5l1b). Read Thu, Oct 1, 2026, 6:32 AM UTC.