M5.4 earthquake 161 km SW of Nikolski, Alaska
A magnitude 5.4 earthquake struck 161 km SW of Nikolski, Alaska on Sun, Jun 27, 1971, 7:15 AM GMT-10 (17:15 UTC), 24 km (15 mi) below the surface.
A larger quake followed: M5.7 158 km SW of Nikolski, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.4 (mw), moderate
- Local time
- UTC
- 1971-06-27 17:15:41 UTC
- Depth
- 23.8 km (14.8 mi), shallow
- Epicenter
- 51.859° N, 170.447° 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
- ±0.42
- Depth from
- From location
Nearby
Within 100 km, magnitude 2.4 and up: 1 in the 60 days after this one and 2 in the 30 days before it.
After
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem783874. Read Tue, Sep 22, 2026, 8:28 AM UTC.