Alaska earthquakes

M4.4 earthquake 136 km SE of Adak, Alaska

A magnitude 4.4 earthquake struck 136 km SE of Adak, Alaska on Fri, Oct 17, 1986, 7:51 PM HADT (04:51 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M4.6 97 km SSW of Atka, Alaska. This one was a foreshock.

More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
4.4 (mb), light
Local time
UTC
1986-10-18 04:51:09 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.005° N, 175.252° 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: 13 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 4.697 km SSW of Atka, Alaska · 14583 days ago · 33 km deep · 56 km away
  2. 4.8120 km SSW of Atka, Alaska · 14582 days ago · 33 km deep · 40 km away
  3. 4.7102 km SSE of Adak, Alaska · 14578 days ago · 33 km deep · 46 km away
  4. 4.868 km SE of Adak, Alaska · 14572 days ago · 33 km deep · 70 km away
  5. 4.7174 km SSE of Adak, Alaska · 14566 days ago · 33 km deep · 49 km away
  6. 4.864 km SSE of Adak, Alaska · 14565 days ago · 33 km deep · 89 km away
  7. 4.792 km S of Adak, Alaska · 14562 days ago · 33 km deep · 80 km away
  8. 4.991 km SSW of Atka, Alaska · 14560 days ago · 33 km deep · 60 km away
  9. 4.6116 km S of Atka, Alaska · 14560 days ago · 33 km deep · 74 km away
  10. 4.5103 km SSE of Adak, Alaska · 14552 days ago · 33 km deep · 53 km away
  11. 4.994 km S of Atka, Alaska · 14540 days ago · 33 km deep · 78 km away
  12. 4.670 km S of Adak, Alaska · 14539 days ago · 33 km deep · 88 km away
  13. 5.290 km ESE of Adak, Alaska · 14526 days ago · 33 km deep · 70 km away

Before

  1. 5.690 km SW of Atka, Alaska · 14585 days ago · 33 km deep · 81 km away
  2. 4.767 km SE of Adak, Alaska · 14595 days ago · 33 km deep · 70 km away
  3. 4.579 km SE of Adak, Alaska · 14596 days ago · 33 km deep · 57 km away
  4. 4.977 km SSE of Adak, Alaska · 14598 days ago · 33 km deep · 67 km away
  5. 5.445 km ESE of Adak, Alaska · 14601 days ago · 33 km deep · 99 km away
  6. 5.0110 km SSW of Atka, Alaska · 14603 days ago · 33 km deep · 41 km away
  7. 4.199 km SW of Atka, Alaska · 14604 days ago · 33 km deep · 59 km away
  8. 4.1108 km SE of Adak, Alaska · 14605 days ago · 33 km deep · 32 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002z1h. Read Tue, Sep 22, 2026, 10:31 PM UTC.