M4.6 earthquake 66 km SSW of Rishiri Town, Japan
A magnitude 4.6 earthquake struck 66 km SSW of Rishiri Town, Japan on Fri, Aug 8, 1980, 12:30 PM JST (03:30 UTC), 278 km (173 mi) below the surface.
A larger quake followed: M4.7 84 km SSW of Rishiri Town, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1980-08-08 03:30:10 UTC
- Depth
- 278.0 km (172.7 mi), intermediate-depth
- Epicenter
- 44.591° N, 140.942° E
- Region
- Japan
- 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.
- Stations used
- 27
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00019ae. Read Tue, Sep 22, 2026, 10:06 AM UTC.