M6.0 earthquake 118 km W of Adak, Alaska
A magnitude 6.0 earthquake struck 118 km W of Adak, Alaska on Thu, Jul 11, 1929, 9:57 AM GMT-11 (20:57 UTC), 35 km (22 mi) below the surface.
A larger quake followed: M6.3 155 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
- 6.0 (mw), strong
- Local time
- UTC
- 1929-07-11 20:57:08 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 51.706° N, 178.337° 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: 2 in the 60 days after this one and 5 in the 30 days before it.
After
- 6.3155 km WSW of Adak, Alaska · 35496 days ago · 35 km deep · 39 km away
- 5.9131 km SW of Adak, Alaska · 35479 days ago · 35 km deep · 65 km away
Before
- 6.075 km SW of Adak, Alaska · 35505 days ago · 35 km deep · 62 km away
- 7.388 km WSW of Adak, Alaska · 35505 days ago · 35 km deep · 48 km away
- 5.7104 km W of Adak, Alaska · 35506 days ago · 35 km deep · 38 km away
- 6.272 km SW of Adak, Alaska · 35507 days ago · 25 km deep · 79 km away
- 7.0114 km WSW of Adak, Alaska · 35508 days ago · 35 km deep · 30 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem908206 (also filed as ushis811). Read Tue, Sep 22, 2026, 8:40 AM UTC.