M7.0 earthquake 101 km S of Adak, Alaska
A magnitude 7.0 earthquake struck 101 km S of Adak, Alaska on Thu, Sep 8, 1910, 2:13 PM GMT-11 (01:13 UTC), 35 km (22 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 7.0 (Mw, moment), major
- Magnitude from
- ISC-GEM global catalog
- Local time
- UTC
- 1910-09-09 01:13:16 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 50.978° N, 176.351° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 7.02 | Mw, moment | ISC-GEM global catalog | Preferred · Final · ±0.2 |
| 7.0 | Ms, surface-wave | USGS historic United States catalog | Final |
What happened
The USGS’s account of the effects of this earthquake.
Note that the “dinner” reference in the comment by Tarr and Martin (1912) below fits much better with this 1910 event, which occurred on Sep 08 at about 3:13 PM local time, than it does for the event one year earlier, which occurred at about 06:50 AM local time on Sep 08, 1909. Stover and Coffman (1993) also decided that this felt report belonged with this 1910 event.
Aleutian Islands. Sufficiently strong to upset Aleutian dinners and disarrange the furniture in some houses.
Abridged from The Earthquakes at Yakutat Bay, Alaska, in September, 1899, by Ralph S. Tarr and Lawrence Martin, U.S. Geological Survey Professional Paper 69, United States Government Printing Office, Washington: 1912. [Stover and Coffman Ref. 420.]
The earthquake displaced furniture in some houses. Maximum observed Modified Mercalli Intensity (MMI) V.
Abridged from Seismicity of the United States, 1568-1989 (Revised), by Carl W. Stover and Jerry L. Coffman, U.S. Geological Survey Professional Paper 1527, United States Government Printing Office, Washington: 1993.
This is one of the Largest Earthquakes in the United States (M>=7.0).
From the USGS event page for iscgem16958107. U.S. Geological Survey text and figures are in the public domain.
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 4.0 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem16958107 (also filed as ushis511). Read Thu, Oct 1, 2026, 6:24 PM UTC.