Alaska earthquakes

M3.3 earthquake 93 km SSE of Atka, Alaska

A magnitude 3.3 earthquake struck 93 km SSE of Atka, Alaska on Tue, Dec 18, 2018, 6:44 PM HAST (04:44 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.1 25 km SSW of Atka, 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
2018-12-19 04:44:07 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.492° N, 173.456° 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
3.3ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.148 · 6 stations
2.5ML, 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 6.1 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
224°, poorly surrounded by stations
Stations used
6

Nearby

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

After

  1. 2.049 km ENE of Atka, Alaska · 2842 days ago · 6 km deep · 95 km away
  2. 2.122 km SW of Atka, Alaska · 2841 days ago · 64 km deep · 88 km away
  3. 2.512 km ENE of Atka, Alaska · 2841 days ago · 164 km deep · 93 km away
  4. 2.392 km SE of Atka, Alaska · 2840 days ago · 13 km deep · 35 km away
  5. 1.953 km SSW of Atka, Alaska · 2838 days ago · 16 km deep · 79 km away
  6. 1.839 km SSE of Atka, Alaska · 2835 days ago · 36 km deep · 56 km away
  7. 1.854 km SW of Atka, Alaska · 2828 days ago · 49 km deep · 96 km away
  8. 3.665 km E of Atka, Alaska · 2827 days ago · 100 km deep · 89 km away
  9. 3.620 km SSE of Atka, Alaska · 2825 days ago · 55 km deep · 73 km away
  10. 2.331 km WSW of Atka, Alaska · 2824 days ago · 94 km deep · 100 km away
  11. 2.350 km SSW of Atka, Alaska · 2814 days ago · 22 km deep · 80 km away
  12. 2.886 km ESE of Atka, Alaska · 2814 days ago · 35 km deep · 39 km away
  13. 2.231 km ESE of Atka, Alaska · 2809 days ago · 60 km deep · 72 km away
  14. 2.66 km NNW of Atka, Alaska · 2802 days ago · 143 km deep · 99 km away
  15. 2.796 km S of Atka, Alaska · 2799 days ago · 35 km deep · 66 km away
  16. 4.125 km SSW of Atka, Alaska · 2788 days ago · 4 km deep · 84 km away
  17. 4.137 km S of Atka, Alaska · 2786 days ago · 67 km deep · 61 km away
  18. 3.164 km SE of Atka, Alaska · 2785 days ago · 35 km deep · 33 km away

Before

  1. 2.260 km SSE of Atka, Alaska · 2846 days ago · 34 km deep · 41 km away
  2. 2.179 km ESE of Atka, Alaska · 2846 days ago · 33 km deep · 43 km away
  3. 1.856 km SSW of Atka, Alaska · 2847 days ago · 38 km deep · 82 km away
  4. 2.642 km E of Atka, Alaska · 2848 days ago · 131 km deep · 73 km away
  5. 2.415 km SE of Atka, Alaska · 2849 days ago · 135 km deep · 78 km away
  6. 1.518 km NE of Atka, Alaska · 2851 days ago · 19 km deep · 96 km away
  7. 1.657 km SSW of Atka, Alaska · 2851 days ago · 18 km deep · 87 km away
  8. 3.994 km SSW of Atka, Alaska · 2853 days ago · 41 km deep · 90 km away
  9. 1.951 km SSE of Atka, Alaska · 2854 days ago · 9 km deep · 43 km away
  10. 1.848 km E of Atka, Alaska · 2855 days ago · 16 km deep · 78 km away
  11. 2.840 km E of Atka, Alaska · 2856 days ago · 35 km deep · 79 km away
  12. 2.386 km SSW of Atka, Alaska · 2857 days ago · 14 km deep · 70 km away
  13. 2.883 km S of Atka, Alaska · 2860 days ago · 35 km deep · 64 km away
  14. 2.157 km SW of Atka, Alaska · 2863 days ago · 40 km deep · 93 km away
  15. 2.250 km SSW of Atka, Alaska · 2866 days ago · 20 km deep · 72 km away
  16. 2.176 km SE of Atka, Alaska · 2871 days ago · 30 km deep · 37 km away
  17. 2.228 km SE of Atka, Alaska · 2872 days ago · 147 km deep · 66 km away
  18. 1.723 km SW of Atka, Alaska · 2872 days ago · 75 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000j0ag (also filed as ak018g7vcp17). Read Thu, Oct 1, 2026, 4:58 PM UTC.