Alaska earthquakes

M6.8 earthquake 235 km WSW of Adak, Alaska

A magnitude 6.8 earthquake struck 235 km WSW of Adak, Alaska on Tue, May 5, 1987, 7:06 PM HADT (04:06 UTC), 20 km (12 mi) below the surface.

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The earthquake

Magnitude
6.8 (mw), strong
Local time
UTC
1987-05-06 04:06:14 UTC
Depth
20.1 km (12.5 mi), shallow
Epicenter
51.272° N, 179.898° 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 2.5 and up: 14 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 5.3262 km WSW of Adak, Alaska · 14384 days ago · 33 km deep · 49 km away
  2. 5.2239 km WSW of Adak, Alaska · 14384 days ago · 33 km deep · 23 km away
  3. 4.5298 km WSW of Adak, Alaska · 14384 days ago · 33 km deep · 77 km away
  4. 4.9245 km WSW of Adak, Alaska · 14384 days ago · 33 km deep · 11 km away
  5. 5.1249 km WSW of Adak, Alaska · 14384 days ago · 33 km deep · 32 km away
  6. 4.4244 km WSW of Adak, Alaska · 14384 days ago · 33 km deep · 15 km away
  7. 4.8246 km WSW of Adak, Alaska · 14384 days ago · 33 km deep · 44 km away
  8. 4.8246 km WSW of Adak, Alaska · 14384 days ago · 33 km deep · 24 km away
  9. 4.9243 km WSW of Adak, Alaska · 14384 days ago · 33 km deep · 33 km away
  10. 4.8236 km WSW of Adak, Alaska · 14384 days ago · 33 km deep · 10 km away
  11. 5.0226 km WSW of Adak, Alaska · 14380 days ago · 33 km deep · 15 km away
  12. 4.8289 km WSW of Adak, Alaska · 14354 days ago · 33 km deep · 54 km away
  13. 4.8248 km WSW of Adak, Alaska · 14353 days ago · 33 km deep · 51 km away
  14. 4.7192 km WSW of Adak, Alaska · 14352 days ago · 33 km deep · 50 km away

Before

  1. 4.3190 km WSW of Adak, Alaska · 14406 days ago · 33 km deep · 69 km away
  2. 4.7242 km WSW of Adak, Alaska · 14412 days ago · 33 km deep · 15 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00034ry (also filed as choy19870506040614, gcmtc050687a, ushis4021, gcmt19870506040615, iscgem465910). Read Tue, Sep 22, 2026, 8:42 AM UTC.