M4.7 earthquake 45 km E of Otofuke, Japan
A magnitude 4.7 earthquake struck 45 km E of Otofuke, Japan on Mon, Jul 23, 1979, 9:38 AM JST (00:38 UTC), 36 km (22 mi) below the surface.
A larger quake followed: M4.9 69 km SSW of Kushiro, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1979-07-23 00:38:31 UTC
- Depth
- 36.0 km (22.4 mi), shallow
- Epicenter
- 43.036° N, 143.759° 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
- 8
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 2 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 usp000120k. Read Wed, Sep 30, 2026, 8:21 AM UTC.