M5.5 earthquake 164 km S of McCarthy, Alaska
A magnitude 5.5 earthquake struck 164 km S of McCarthy, Alaska on Thu, Apr 30, 1964, 8:26 AM GMT-9 (17:26 UTC), 15 km (9 mi) below the surface.
A larger quake followed: M5.7 181 km W of Yakutat, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mw), moderate
- Local time
- UTC
- 1964-04-30 17:26:28 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 59.972° N, 142.555° 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: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem869230. Read Mon, Sep 21, 2026, 4:58 PM UTC.