M5.6 earthquake 108 km ENE of Chiniak, Alaska
A magnitude 5.6 earthquake struck 108 km ENE of Chiniak, Alaska on Sat, Mar 28, 1964, 12:28 PM GMT-10 (22:28 UTC), 20 km (13 mi) below the surface.
A larger quake followed: M5.6 68 km ESE of Chiniak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.6 (mw), moderate
- Local time
- UTC
- 1964-03-28 22:28:47 UTC
- Depth
- 20.4 km (12.7 mi), shallow
- Epicenter
- 58.010° N, 150.622° 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
- ±0.31
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 7 in the 60 days after this one and 4 in the 30 days before it.
After
- 5.668 km ESE of Chiniak, Alaska · 22822 days ago · 20 km deep · 90 km away
- 5.550 km ESE of Chiniak, Alaska · 22822 days ago · 21 km deep · 80 km away
- 5.5122 km ENE of Kodiak, Alaska · 22821 days ago · 23 km deep · 18 km away
- 5.6141 km SE of Halibut Cove, Alaska · 22820 days ago · 20 km deep · 93 km away
- 5.5107 km ENE of Ouzinkie, Alaska · 22810 days ago · 18 km deep · 26 km away
- 5.647 km ESE of Chiniak, Alaska · 22806 days ago · 27 km deep · 80 km away
- 5.541 km E of Chiniak, Alaska · 22803 days ago · 20 km deep · 72 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem869995. Read Mon, Sep 21, 2026, 10:17 PM UTC.