M6.4 earthquake 37 km SSE of Glacier View, Alaska
A magnitude 6.4 earthquake struck 37 km SSE of Glacier View, Alaska on Mon, Apr 20, 1964, 1:56 AM GMT-10 (11:56 UTC), 30 km (19 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.4 (mw), strong
- Local time
- UTC
- 1964-04-20 11:56:43 UTC
- Depth
- 30.0 km (18.6 mi), shallow
- Epicenter
- 61.492° N, 147.403° W
- Region
- Alaska
- Strongest shaking
- VII, very strong 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
- VII, very strong shaking
- 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 2.5 and up: 2 in the 60 days after this one and 4 in the 30 days before it.
After
- 5.345 km S of Glacier View, Alaska · 22800 days ago · 30 km deep · 11 km away
- 5.942 km S of Glacier View, Alaska · 22800 days ago · 36 km deep · 12 km away
Before
- 5.547 km SSE of Glacier View, Alaska · 22806 days ago · 27 km deep · 10 km away
- 6.423 km S of Glacier View, Alaska · 22817 days ago · 39 km deep · 18 km away
- 5.148 km NNW of Valdez, Alaska · 22823 days ago · 45 km deep · 40 km away
- 9.2The 1964 Prince William Sound, Alaska Earthquake · 22824 days ago · 25 km deep · 65 km away · felt by 459
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem868951 (also filed as ushis2696, atlas19640420115644). Read Tue, Sep 22, 2026, 5:16 PM UTC.