Alaska earthquakes

M4.8 earthquake 68 km SE of Adak, Alaska

A magnitude 4.8 earthquake struck 68 km SE of Adak, Alaska on Thu, Oct 30, 1986, 6:07 PM HAST (04:07 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.9 45 km S of Adak, 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
4.8 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1986-10-31 04:07:20 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.522° N, 175.826° 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 1.8 and up: 9 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 5.945 km S of Adak, Alaska · 14574 days ago · 33 km deep · 60 km away
  2. 4.864 km SSE of Adak, Alaska · 14574 days ago · 33 km deep · 49 km away
  3. 4.792 km S of Adak, Alaska · 14571 days ago · 33 km deep · 65 km away
  4. 4.991 km SSW of Atka, Alaska · 14569 days ago · 33 km deep · 73 km away
  5. 4.5103 km SSE of Adak, Alaska · 14561 days ago · 33 km deep · 55 km away
  6. 4.670 km S of Adak, Alaska · 14548 days ago · 33 km deep · 52 km away
  7. 5.290 km ESE of Adak, Alaska · 14534 days ago · 33 km deep · 33 km away
  8. 4.895 km SSW of Atka, Alaska · 14533 days ago · 33 km deep · 95 km away
  9. 5.146 km SSW of Adak, Alaska · 14531 days ago · 33 km deep · 80 km away

Before

  1. 4.7102 km SSE of Adak, Alaska · 14587 days ago · 33 km deep · 50 km away
  2. 5.254 km SSW of Adak, Alaska · 14587 days ago · 33 km deep · 73 km away
  3. 4.8120 km SSW of Atka, Alaska · 14591 days ago · 33 km deep · 86 km away
  4. 4.697 km SSW of Atka, Alaska · 14591 days ago · 33 km deep · 76 km away
  5. 4.4136 km SE of Adak, Alaska · 14594 days ago · 33 km deep · 70 km away
  6. 5.690 km SW of Atka, Alaska · 14594 days ago · 33 km deep · 44 km away
  7. 4.767 km SE of Adak, Alaska · 14604 days ago · 33 km deep · 2 km away
  8. 4.579 km SE of Adak, Alaska · 14605 days ago · 33 km deep · 14 km away
  9. 5.225 km E of Adak, Alaska · 14606 days ago · 43 km deep · 48 km away
  10. 4.977 km SSE of Adak, Alaska · 14607 days ago · 33 km deep · 37 km away
  11. 5.445 km ESE of Adak, Alaska · 14610 days ago · 33 km deep · 30 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002zhp. Read Thu, Oct 1, 2026, 5:10 PM UTC.