M5.4 earthquake 36 km SSW of Chiniak, Alaska
A magnitude 5.4 earthquake struck 36 km SSW of Chiniak, Alaska on Fri, Apr 22, 1966, 1:27 PM GMT-10 (23:27 UTC), 22 km (14 mi) below the surface.
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
- 1966-04-22 23:27:21 UTC
- Depth
- 22.3 km (13.9 mi), shallow
- Epicenter
- 57.293° N, 152.442° W
- Region
- Alaska
- Strongest shaking
- V, moderate shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- V, moderate shaking
- Peak ground acceleration
- 11.5% of gravity
- Peak ground velocity
- 2.1 cm/s
- Map
- Automatic
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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.4 and up: 0 in the 60 days after this one and 4 in the 30 days before it.
Before
- 6.136 km ESE of Akhiok, Alaska · 22076 days ago · 35 km deep · 87 km away
- 5.8103 km SE of Old Harbor, Alaska · 22080 days ago · 25 km deep · 88 km away
- 5.594 km SSE of Old Harbor, Alaska · 22083 days ago · 22 km deep · 91 km away
- 5.7100 km SSE of Old Harbor, Alaska · 22083 days ago · 31 km deep · 97 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem848633 (also filed as ushis2890). Read Thu, Sep 24, 2026, 9:21 AM UTC.