Alaska earthquakes

M3.3 earthquake 257 km W of Adak, Alaska

A magnitude 3.3 earthquake struck 257 km W of Adak, Alaska on Thu, Mar 28, 2019, 4:03 AM GMT+12 (16:03 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.1 271 km WSW of Adak, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.3 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2019-03-27 16:03:17 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.799° N, 179.627° E
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
3.3ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.148 · 6 stations
3.1ML, 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 7.6 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
196°, poorly surrounded by stations
Stations used
21

Nearby

Within 100 km, magnitude 1.5 and up: 33 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 2.6226 km WSW of Adak, Alaska · 2745 days ago · 35 km deep · 69 km away
  2. 3.8Rat Islands, Aleutian Islands, Alaska · 2745 days ago · 104 km deep · 80 km away
  3. 3.1283 km WSW of Adak, Alaska · 2744 days ago · 25 km deep · 87 km away
  4. 3.9Rat Islands, Aleutian Islands, Alaska · 2739 days ago · 115 km deep · 91 km away
  5. 4.1271 km WSW of Adak, Alaska · 2738 days ago · 158 km deep · 53 km away
  6. 3.3252 km W of Adak, Alaska · 2738 days ago · 125 km deep · 57 km away
  7. 2.8293 km W of Adak, Alaska · 2737 days ago · 20 km deep · 51 km away
  8. 2.1183 km WSW of Adak, Alaska · 2733 days ago · 33 km deep · 92 km away
  9. 3.8Rat Islands, Aleutian Islands, Alaska · 2732 days ago · 106 km deep · 85 km away
  10. 2.4184 km WSW of Adak, Alaska · 2731 days ago · 37 km deep · 87 km away
  11. 2.7175 km W of Adak, Alaska · 2728 days ago · 86 km deep · 83 km away
  12. 2.8192 km WSW of Adak, Alaska · 2726 days ago · 57 km deep · 82 km away
  13. 2.4180 km W of Adak, Alaska · 2726 days ago · 42 km deep · 84 km away
  14. 2.2175 km WSW of Adak, Alaska · 2721 days ago · 52 km deep · 93 km away
  15. 2.6232 km WSW of Adak, Alaska · 2720 days ago · 16 km deep · 99 km away
  16. 3.1225 km W of Adak, Alaska · 2719 days ago · 55 km deep · 32 km away
  17. 2.8186 km WSW of Adak, Alaska · 2717 days ago · 50 km deep · 83 km away
  18. 3.9266 km W of Adak, Alaska · 2713 days ago · 71 km deep · 10 km away
  19. 1.8159 km W of Adak, Alaska · 2705 days ago · 9 km deep · 98 km away
  20. 1.9197 km W of Adak, Alaska · 2699 days ago · 69 km deep · 71 km away
  21. 2.3279 km W of Adak, Alaska · 2697 days ago · 59 km deep · 46 km away
  22. 3.0Rat Islands, Aleutian Islands, Alaska · 2697 days ago · 35 km deep · 56 km away
  23. 2.1171 km W of Adak, Alaska · 2696 days ago · 13 km deep · 91 km away
  24. 2.5285 km W of Adak, Alaska · 2695 days ago · 10 km deep · 55 km away
  25. 2.2Rat Islands, Aleutian Islands, Alaska · 2694 days ago · 70 km deep · 97 km away
  26. 2.6Rat Islands, Aleutian Islands, Alaska · 2694 days ago · 35 km deep · 93 km away
  27. 2.4206 km W of Adak, Alaska · 2693 days ago · 149 km deep · 61 km away
  28. 3.6267 km W of Adak, Alaska · 2693 days ago · 60 km deep · 25 km away
  29. 2.3170 km W of Adak, Alaska · 2692 days ago · 138 km deep · 87 km away
  30. 2.7260 km WSW of Adak, Alaska · 2691 days ago · 30 km deep · 47 km away
  31. 2.1165 km W of Adak, Alaska · 2689 days ago · 90 km deep · 94 km away
  32. 2.3248 km W of Adak, Alaska · 2688 days ago · 33 km deep · 51 km away
  33. 2.5223 km WSW of Adak, Alaska · 2687 days ago · 35 km deep · 87 km away

Before

  1. 2.2194 km W of Adak, Alaska · 2745 days ago · 80 km deep · 64 km away
  2. 4.6Rat Islands, Aleutian Islands, Alaska · 2748 days ago · 98 km deep · 81 km away
  3. 2.3202 km W of Adak, Alaska · 2758 days ago · 17 km deep · 58 km away
  4. 2.8255 km W of Adak, Alaska · 2759 days ago · 24 km deep · 22 km away
  5. 2.4162 km W of Adak, Alaska · 2759 days ago · 20 km deep · 96 km away
  6. 3.0187 km WSW of Adak, Alaska · 2765 days ago · 35 km deep · 93 km away
  7. 3.9Rat Islands, Aleutian Islands, Alaska · 2766 days ago · 94 km deep · 88 km away
  8. 2.5172 km WNW of Adak, Alaska · 2772 days ago · 10 km deep · 100 km away
  9. 3.0171 km WSW of Adak, Alaska · 2772 days ago · 35 km deep · 92 km away
  10. 2.7226 km W of Adak, Alaska · 2773 days ago · 72 km deep · 47 km away
  11. 2.6166 km WSW of Adak, Alaska · 2774 days ago · 36 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us700039aa (also filed as ak0193yhrhv4). Read Thu, Oct 1, 2026, 9:47 PM UTC.