Alaska earthquakes

M5.0 earthquake 81 km SE of Atka, AK

A magnitude 5.0 earthquake struck 81 km SE of Atka, AK on Fri, Nov 27, 1987, 2:27 AM HAST (12:27 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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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
5.0 (mb), moderate
Local time
UTC
1987-11-27 12:27:05 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.624° N, 173.476° 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 2.0 and up: 17 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 4.6112 km E of Atka, Alaska · 14156 days ago · 33 km deep · 93 km away
  2. 5.595 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 85 km away
  3. 5.5103 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 89 km away
  4. 5.2103 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 92 km away
  5. 5.1100 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 89 km away
  6. 4.735 km WSW of Atka, Alaska · 14132 days ago · 33 km deep · 93 km away
  7. 5.383 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 86 km away
  8. 5.193 km SSW of Atka, Alaska · 14132 days ago · 33 km deep · 87 km away
  9. 5.0108 km S of Atka, Alaska · 14124 days ago · 33 km deep · 71 km away
  10. 4.781 km S of Atka, Alaska · 14124 days ago · 33 km deep · 53 km away
  11. 4.886 km S of Atka, Alaska · 14123 days ago · 33 km deep · 53 km away
  12. 5.085 km S of Atka, Alaska · 14123 days ago · 33 km deep · 58 km away
  13. 4.699 km S of Atka, Alaska · 14122 days ago · 33 km deep · 67 km away
  14. 5.085 km S of Atka, Alaska · 14122 days ago · 33 km deep · 61 km away
  15. 5.088 km S of Atka, Alaska · 14122 days ago · 48 km deep · 60 km away
  16. 4.670 km S of Atka, Alaska · 14122 days ago · 33 km deep · 51 km away
  17. 4.892 km S of Atka, Alaska · 14122 days ago · 33 km deep · 61 km away

Before

  1. 4.7111 km S of Atka, Alaska · 14188 days ago · 33 km deep · 75 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0003am7. Read Tue, Sep 22, 2026, 9:16 AM UTC.