M7.5 earthquake 137 km WSW of Rishiri Town, Japan
A magnitude 7.5 earthquake struck 137 km WSW of Rishiri Town, Japan on Fri, Aug 2, 1940, 12:08 AM JST (15:08 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
- 7.5 (mw), major
- Local time
- UTC
- 1940-08-01 15:08:24 UTC
- Depth
- 15.0 km (9.3 mi), shallow
- Epicenter
- 44.561° N, 139.678° E
- Region
- Japan
- Strongest shaking
- V, moderate shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- V, moderate shaking
- Peak ground acceleration
- 5.8% of gravity
- Peak ground velocity
- 2.4 cm/s
- Map
- Automatic
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
- ±0.30
- 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 iscgem901515. Read Tue, Sep 22, 2026, 9:38 AM UTC.