Alaska earthquakes

M3.9 earthquake 155 km SW of Nikolski, Alaska

A magnitude 3.9 earthquake struck 155 km SW of Nikolski, Alaska on Sat, Jun 22, 2019, 8:01 AM HADT (17:01 UTC), 40 km (25 mi) below the surface.

A larger quake followed: M4.3 119 km SSW of Nikolski, 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
3.9 (mb, body-wave), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2019-06-22 17:01:39 UTC
Depth
40.3 km (25.0 mi), shallow
Epicenter
51.969° N, 170.506° 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
3.9mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.049 · 110 stations
3.8ML, 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, 8.1 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
152°
Stations used
191

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 2.8149 km SW of Nikolski, Alaska · 2661 days ago · 10 km deep · 18 km away
  2. 2.771 km SW of Nikolski, Alaska · 2659 days ago · 27 km deep · 85 km away
  3. 2.5163 km SW of Nikolski, Alaska · 2658 days ago · 61 km deep · 11 km away
  4. 2.7137 km SW of Nikolski, Alaska · 2649 days ago · 35 km deep · 30 km away
  5. 2.3104 km SW of Nikolski, Alaska · 2632 days ago · 27 km deep · 51 km away
  6. 3.0127 km SW of Nikolski, Alaska · 2624 days ago · 35 km deep · 29 km away
  7. 3.7169 km ESE of Atka, Alaska · 2622 days ago · 49 km deep · 87 km away
  8. 4.3119 km SSW of Nikolski, Alaska · 2618 days ago · 10 km deep · 76 km away
  9. 3.8135 km SW of Nikolski, Alaska · 2618 days ago · 45 km deep · 23 km away
  10. 2.9235 km ESE of Atka, Alaska · 2617 days ago · 10 km deep · 88 km away
  11. 2.370 km SW of Nikolski, Alaska · 2616 days ago · 38 km deep · 85 km away
  12. 1.871 km SW of Nikolski, Alaska · 2613 days ago · 53 km deep · 84 km away
  13. 3.7171 km SW of Nikolski, Alaska · 2612 days ago · 35 km deep · 29 km away
  14. 2.7143 km SW of Nikolski, Alaska · 2608 days ago · 35 km deep · 27 km away
  15. 2.9140 km SW of Nikolski, Alaska · 2606 days ago · 35 km deep · 27 km away
  16. 2.297 km SW of Nikolski, Alaska · 2604 days ago · 1 km deep · 62 km away
  17. 2.9119 km SW of Nikolski, Alaska · 2603 days ago · 35 km deep · 37 km away
  18. 2.399 km SW of Nikolski, Alaska · 2603 days ago · 50 km deep · 57 km away

Before

  1. 2.597 km SSW of Nikolski, Alaska · 2665 days ago · 26 km deep · 64 km away
  2. 2.8160 km WSW of Nikolski, Alaska · 2667 days ago · 35 km deep · 85 km away
  3. 3.1146 km SW of Nikolski, Alaska · 2672 days ago · 35 km deep · 19 km away
  4. 3.188 km WSW of Nikolski, Alaska · 2674 days ago · 58 km deep · 79 km away
  5. 3.259 km SW of Nikolski, Alaska · 2676 days ago · 29 km deep · 96 km away
  6. 2.771 km SW of Nikolski, Alaska · 2680 days ago · 32 km deep · 84 km away
  7. 3.7156 km SW of Nikolski, Alaska · 2687 days ago · 19 km deep · 11 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us600044nr (also filed as ak0197ye3qpg). Read Mon, Oct 5, 2026, 5:24 AM UTC.