Alaska earthquakes

M6.8 earthquake 90 km SSW of Adak, Alaska

A magnitude 6.8 earthquake struck 90 km SSW of Adak, Alaska on Sun, Mar 10, 1957, 4:12 PM GMT-11 (03:12 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M7.1 60 km SW 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
6.8 (mw), strong
Local time
UTC
1957-03-11 03:12:48 UTC
Depth
15.0 km (9.3 mi), shallow
Epicenter
51.093° N, 176.981° 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.

Magnitude uncertainty
±0.20
Depth from
From location

Nearby

Within 100 km, magnitude 2.5 and up: 6 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 6.0136 km S of Adak, Alaska · 25398 days ago · 33 km deep · 48 km away
  2. 6.4133 km SW of Adak, Alaska · 25397 days ago · 10 km deep · 87 km away
  3. 7.160 km SW of Adak, Alaska · 25397 days ago · 20 km deep · 47 km away
  4. 7.175 km S of Adak, Alaska · 25394 days ago · 25 km deep · 21 km away
  5. 6.061 km SSW of Adak, Alaska · 25390 days ago · 35 km deep · 28 km away
  6. 5.8176 km S of Adak, Alaska · 25368 days ago · 14 km deep · 89 km away

Before

  1. 6.4146 km S of Adak, Alaska · 25398 days ago · 33 km deep · 60 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event iscgem886083 (also filed as ushis2153). Read Tue, Sep 22, 2026, 11:32 PM UTC.