M5.8 earthquake 193 km SSE of Old Harbor, Alaska
A magnitude 5.8 earthquake struck 193 km SSE of Old Harbor, Alaska on Tue, Apr 7, 1964, 9:28 AM GMT-10 (19:28 UTC), 15 km (9 mi) below the surface.
A larger quake followed: M6.3 98 km SE of Old Harbor, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.8 (mw), moderate
- Local time
- UTC
- 1964-04-07 19:28:25 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 55.622° N, 152.022° 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: 5 in the 60 days after this one and 3 in the 30 days before it.
After
- 6.398 km SE of Old Harbor, Alaska · 22808 days ago · 10 km deep · 99 km away
- 5.7133 km SE of Old Harbor, Alaska · 22808 days ago · 15 km deep · 91 km away
- 5.5111 km SSE of Old Harbor, Alaska · 22807 days ago · 11 km deep · 84 km away
- 6.199 km SSE of Old Harbor, Alaska · 22803 days ago · 10 km deep · 98 km away
- 6.297 km SSE of Old Harbor, Alaska · 22778 days ago · 24 km deep · 98 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem868493 (also filed as ushis2685). Read Tue, Sep 22, 2026, 6:33 AM UTC.