Alaska earthquakes

M4.3 earthquake 97 km SW of Atka, Alaska

A magnitude 4.3 earthquake struck 97 km SW of Atka, Alaska on Fri, Dec 25, 1987, 6:43 AM HAST (16:43 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.5 95 km SSW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.3 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1987-12-25 16:43:42 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.538° N, 175.140° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Depth from
OPERATOR_ASSIGNED

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 5.595 km SSW of Atka, Alaska · 14142 days ago · 33 km deep · 39 km away
  2. 5.5103 km SSW of Atka, Alaska · 14142 days ago · 33 km deep · 42 km away
  3. 5.2103 km SSW of Atka, Alaska · 14142 days ago · 33 km deep · 39 km away
  4. 5.1100 km SSW of Atka, Alaska · 14142 days ago · 33 km deep · 39 km away
  5. 4.735 km WSW of Atka, Alaska · 14142 days ago · 33 km deep · 65 km away
  6. 5.383 km SSW of Atka, Alaska · 14142 days ago · 33 km deep · 30 km away
  7. 5.193 km SSW of Atka, Alaska · 14142 days ago · 33 km deep · 35 km away
  8. 5.0108 km S of Atka, Alaska · 14133 days ago · 33 km deep · 70 km away
  9. 4.781 km S of Atka, Alaska · 14133 days ago · 33 km deep · 65 km away
  10. 4.886 km S of Atka, Alaska · 14132 days ago · 33 km deep · 69 km away
  11. 5.085 km S of Atka, Alaska · 14132 days ago · 33 km deep · 63 km away
  12. 4.699 km S of Atka, Alaska · 14132 days ago · 33 km deep · 65 km away
  13. 5.085 km S of Atka, Alaska · 14132 days ago · 33 km deep · 60 km away
  14. 5.088 km S of Atka, Alaska · 14132 days ago · 48 km deep · 62 km away
  15. 4.670 km S of Atka, Alaska · 14132 days ago · 33 km deep · 64 km away
  16. 4.892 km S of Atka, Alaska · 14131 days ago · 33 km deep · 64 km away

Before

  1. 4.979 km SE of Adak, Alaska · 14170 days ago · 33 km deep · 57 km away
  2. 5.0135 km SSW of Atka, Alaska · 14171 days ago · 33 km deep · 49 km away
  3. 4.679 km E of Adak, Alaska · 14175 days ago · 33 km deep · 46 km away
  4. 4.6114 km SE of Adak, Alaska · 14181 days ago · 33 km deep · 39 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0003bj3. Read Thu, Oct 1, 2026, 6:41 PM UTC.