Alaska earthquakes

M3.8 earthquake 160 km WSW of Nikolski, Alaska

A magnitude 3.8 earthquake struck 160 km WSW of Nikolski, Alaska on Mon, Dec 9, 2019, 1:44 AM HAST (11:44 UTC), 36 km (22 mi) below the surface.

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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
3.8 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2019-12-09 11:44:31 UTC
Depth
35.9 km (22.3 mi), shallow
Epicenter
52.221° N, 170.915° 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
3.8ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.091 · 16 stations
3.4ML, 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 3.9 km horizontally, 15.3 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
179°
Stations used
26

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 2.966 km SW of Nikolski, Alaska · 2483 days ago · 31 km deep · 94 km away
  2. 3.0101 km SW of Nikolski, Alaska · 2483 days ago · 35 km deep · 73 km away
  3. 3.5131 km W of Nikolski, Alaska · 2477 days ago · 212 km deep · 77 km away
  4. 3.6130 km E of Atka, Alaska · 2449 days ago · 30 km deep · 98 km away
  5. 2.9169 km SW of Nikolski, Alaska · 2446 days ago · 26 km deep · 14 km away
  6. 2.280 km SW of Nikolski, Alaska · 2444 days ago · 51 km deep · 83 km away
  7. 3.188 km SW of Nikolski, Alaska · 2444 days ago · 11 km deep · 87 km away
  8. 3.5187 km ESE of Atka, Alaska · 2442 days ago · 36 km deep · 76 km away
  9. 3.3113 km SW of Nikolski, Alaska · 2436 days ago · 44 km deep · 57 km away
  10. 3.5195 km E of Atka, Alaska · 2431 days ago · 35 km deep · 45 km away

Before

  1. 2.7134 km E of Atka, Alaska · 2491 days ago · 28 km deep · 95 km away
  2. 2.773 km SW of Nikolski, Alaska · 2498 days ago · 35 km deep · 94 km away
  3. 2.9114 km SSW of Nikolski, Alaska · 2500 days ago · 35 km deep · 85 km away
  4. 2.673 km SW of Nikolski, Alaska · 2503 days ago · 10 km deep · 89 km away
  5. 3.7150 km SW of Nikolski, Alaska · 2505 days ago · 35 km deep · 38 km away
  6. 2.8158 km E of Atka, Alaska · 2514 days ago · 33 km deep · 66 km away
  7. 3.7176 km ESE of Atka, Alaska · 2518 days ago · 35 km deep · 67 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us60006pgz (also filed as ak019frg5auu). Read Fri, Oct 2, 2026, 2:23 PM UTC.