M4.8 earthquake 169 km SSE of Chignik, Alaska
A magnitude 4.8 earthquake struck 169 km SSE of Chignik, Alaska on Wed, Jul 21, 1982, 2:49 PM GMT-9 (23:49 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.9 116 km ESE of Chignik, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (mb), light
- Local time
- UTC
- 1982-07-21 23:49:08 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 54.996° N, 156.993° 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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 and up: 1 in the 60 days after this one and 1 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 usp0001nj0. Read Tue, Sep 22, 2026, 9:07 AM UTC.