M5.6 earthquake 141 km SE of Halibut Cove, Alaska
A magnitude 5.6 earthquake struck 141 km SE of Halibut Cove, Alaska on Mon, Mar 30, 1964, 5:07 AM GMT-10 (15:07 UTC), 20 km (13 mi) below the surface.
A larger quake followed: M5.7 125 km SE of Halibut Cove, 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
- 1964-03-30 15:07:49 UTC
- Depth
- 20.3 km (12.6 mi), shallow
- Epicenter
- 58.640° N, 149.584° 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
- ±0.30
- 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: 3 in the 60 days after this one and 5 in the 30 days before it.
After
- 5.7125 km SE of Halibut Cove, Alaska · 22818 days ago · 22 km deep · 33 km away
- 5.5107 km ENE of Ouzinkie, Alaska · 22810 days ago · 18 km deep · 83 km away
- 5.5119 km ENE of Kodiak, Alaska · 22762 days ago · 24 km deep · 77 km away
Before
- 5.5122 km ENE of Kodiak, Alaska · 22822 days ago · 23 km deep · 75 km away
- 5.6108 km ENE of Chiniak, Alaska · 22822 days ago · 20 km deep · 93 km away
- 6.4138 km SE of Halibut Cove, Alaska · 22823 days ago · 20 km deep · 20 km away
- 5.8135 km SE of Halibut Cove, Alaska · 22823 days ago · 19 km deep · 12 km away
- 5.7121 km S of Lowell Point, Alaska · 22823 days ago · 15 km deep · 39 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem870184. Read Tue, Sep 22, 2026, 5:50 AM UTC.