M6.4 earthquake 72 km SE of Adak, Alaska
A magnitude 6.4 earthquake struck 72 km SE of Adak, Alaska on Sun, May 19, 1929, 5:53 PM GMT-11 (04:53 UTC), 35 km (22 mi) below the surface.
A larger quake followed: M6.6 85 km SSW of Adak, Alaska. This one was a foreshock.
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
- 1929-05-20 04:53:01 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 51.482° N, 175.797° 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
- ±0.20
- Depth from
- From location
Nearby
Within 100 km, magnitude 2.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem908085 (also filed as ushis801). Read Wed, Sep 23, 2026, 3:31 AM UTC.