Alaska earthquakes

M4.8 earthquake 89 km S of Atka, Alaska

A magnitude 4.8 earthquake struck 89 km S of Atka, Alaska on Fri, Aug 1, 1986, 12:41 PM HADT (21:41 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M4.9 86 km S 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
4.8 (mb), light
Local time
UTC
1986-08-01 21:41:23 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.392° N, 174.245° 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: 10 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 4.986 km S of Atka, Alaska · 14662 days ago · 33 km deep · 4 km away
  2. 4.571 km S of Atka, Alaska · 14662 days ago · 33 km deep · 19 km away
  3. 4.795 km SSW of Atka, Alaska · 14661 days ago · 33 km deep · 36 km away
  4. 5.087 km S of Atka, Alaska · 14661 days ago · 33 km deep · 6 km away
  5. 4.3Andreanof Islands, Aleutian Islands, Alaska · 14654 days ago · 33 km deep · 35 km away
  6. 4.888 km SW of Atka, Alaska · 14649 days ago · 33 km deep · 72 km away
  7. 4.488 km SW of Atka, Alaska · 14631 days ago · 33 km deep · 71 km away
  8. 4.1108 km SE of Adak, Alaska · 14605 days ago · 33 km deep · 80 km away
  9. 4.199 km SW of Atka, Alaska · 14604 days ago · 33 km deep · 66 km away
  10. 5.0110 km SSW of Atka, Alaska · 14603 days ago · 33 km deep · 51 km away

Before

  1. 5.492 km S of Atka, Alaska · 14662 days ago · 33 km deep · 4 km away
  2. 4.4Andreanof Islands, Aleutian Islands, Alaska · 14666 days ago · 33 km deep · 82 km away
  3. 4.785 km SW of Atka, Alaska · 14666 days ago · 33 km deep · 77 km away
  4. 5.588 km WSW of Atka, Alaska · 14666 days ago · 33 km deep · 85 km away
  5. 5.4Andreanof Islands, Aleutian Islands, Alaska · 14667 days ago · 33 km deep · 25 km away
  6. 4.993 km SW of Atka, Alaska · 14670 days ago · 33 km deep · 76 km away
  7. 4.631 km SW of Atka, Alaska · 14674 days ago · 33 km deep · 74 km away
  8. 4.0101 km SW of Atka, Alaska · 14675 days ago · 33 km deep · 64 km away
  9. 4.888 km SSW of Atka, Alaska · 14677 days ago · 33 km deep · 24 km away
  10. 4.5Andreanof Islands, Aleutian Islands, Alaska · 14686 days ago · 33 km deep · 63 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002wt3. Read Tue, Sep 22, 2026, 7:45 PM UTC.