M6.3 earthquake 136 km SW of Asau, Samoa
A magnitude 6.3 earthquake struck 136 km SW of Asau, Samoa on Sun, Aug 11, 1940, 5:16 AM GMT-11:30 (16:46 UTC), 15 km (9 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.3 (mw), strong
- Local time
- UTC
- 1940-08-11 16:46:48 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 14.487° S, 173.422° W
- Region
- Samoa
- 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
- ±0.56
- 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: 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 iscgem901529. Read Mon, Sep 21, 2026, 9:17 PM UTC.