M4.8 earthquake 21 km SSW of Obihiro, Japan
A magnitude 4.8 earthquake struck 21 km SSW of Obihiro, Japan on Sun, May 1, 1977, 12:23 AM JST (15:23 UTC), 121 km (75 mi) below the surface.
A larger quake followed: M5.1 24 km W of Shizunai-furukawach?, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (mb), light
- Local time
- UTC
- 1977-04-30 15:23:39 UTC
- Depth
- 121.0 km (75.2 mi), intermediate-depth
- Epicenter
- 42.734° N, 143.118° 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
- 36
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 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 usp0000nps. Read Tue, Sep 22, 2026, 10:51 AM UTC.