M4.2 earthquake 55 km NNE of Otofuke, Japan
A magnitude 4.2 earthquake struck 55 km NNE of Otofuke, Japan on Sat, Sep 1, 1973, 10:38 PM JST (13:38 UTC), 76 km (47 mi) below the surface.
A larger quake followed: M4.5 18 km SSW of Obihiro, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb), light
- Local time
- UTC
- 1973-09-01 13:38:32 UTC
- Depth
- 76.0 km (47.2 mi), intermediate-depth
- Epicenter
- 43.478° N, 143.356° 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
- 9
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 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 usp00003a5. Read Tue, Sep 22, 2026, 4:55 PM UTC.