Alaska earthquakes

M4.7 earthquake 67 km SE of Adak, Alaska

A magnitude 4.7 earthquake struck 67 km SE of Adak, Alaska on Tue, Oct 7, 1986, 5:40 AM HADT (14:40 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.6 90 km SW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.7 (mb), light
Local time
UTC
1986-10-07 14:40:11 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.513° N, 175.851° 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 1.7 and up: 13 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 5.690 km SW of Atka, Alaska · 14585 days ago · 33 km deep · 46 km away
  2. 4.4136 km SE of Adak, Alaska · 14585 days ago · 33 km deep · 70 km away
  3. 4.697 km SSW of Atka, Alaska · 14583 days ago · 33 km deep · 78 km away
  4. 4.8120 km SSW of Atka, Alaska · 14582 days ago · 33 km deep · 87 km away
  5. 5.254 km SSW of Adak, Alaska · 14578 days ago · 33 km deep · 71 km away
  6. 4.7102 km SSE of Adak, Alaska · 14578 days ago · 33 km deep · 49 km away
  7. 4.868 km SE of Adak, Alaska · 14572 days ago · 33 km deep · 2 km away
  8. 5.945 km S of Adak, Alaska · 14565 days ago · 33 km deep · 58 km away
  9. 4.864 km SSE of Adak, Alaska · 14565 days ago · 33 km deep · 47 km away
  10. 4.792 km S of Adak, Alaska · 14562 days ago · 33 km deep · 63 km away
  11. 4.991 km SSW of Atka, Alaska · 14560 days ago · 33 km deep · 75 km away
  12. 4.5103 km SSE of Adak, Alaska · 14552 days ago · 33 km deep · 54 km away
  13. 4.670 km S of Adak, Alaska · 14539 days ago · 33 km deep · 50 km away

Before

  1. 4.579 km SE of Adak, Alaska · 14596 days ago · 33 km deep · 14 km away
  2. 5.225 km E of Adak, Alaska · 14597 days ago · 43 km deep · 48 km away
  3. 4.977 km SSE of Adak, Alaska · 14598 days ago · 33 km deep · 35 km away
  4. 5.445 km ESE of Adak, Alaska · 14601 days ago · 33 km deep · 30 km away
  5. 5.0110 km SSW of Atka, Alaska · 14603 days ago · 33 km deep · 65 km away
  6. 4.199 km SW of Atka, Alaska · 14604 days ago · 33 km deep · 47 km away
  7. 4.1108 km SE of Adak, Alaska · 14605 days ago · 33 km deep · 41 km away
  8. 4.594 km SSW of Adak, Alaska · 14615 days ago · 33 km deep · 93 km away
  9. 4.946 km SW of Adak, Alaska · 14618 days ago · 33 km deep · 86 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002yrs. Read Tue, Sep 22, 2026, 9:19 PM UTC.