M6.6 earthquake 85 km SSW of Adak, Alaska
A magnitude 6.6 earthquake struck 85 km SSW of Adak, Alaska on Fri, Jul 5, 1929, 11:36 AM GMT-11 (22:36 UTC), 25 km (16 mi) below the surface.
A larger quake followed: M7.3 88 km WSW 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
- 6.6 (mw), strong
- Local time
- UTC
- 1929-07-05 22:36:20 UTC
- Depth
- 25.0 km (15.5 mi), shallow
- Epicenter
- 51.127° N, 176.937° 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
- ±0.32
- Depth from
- From location
Nearby
Within 100 km, magnitude 3.6 and up: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 6.272 km SW of Adak, Alaska · 35513 days ago · 25 km deep · 39 km away
- 5.8150 km SW of Adak, Alaska · 35512 days ago · 35 km deep · 79 km away
- 7.388 km WSW of Adak, Alaska · 35512 days ago · 35 km deep · 69 km away
- 6.075 km SW of Adak, Alaska · 35511 days ago · 35 km deep · 56 km away
- 5.9131 km SW of Adak, Alaska · 35485 days ago · 35 km deep · 82 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem908191 (also filed as ushis807). Read Mon, Sep 28, 2026, 10:49 AM UTC.