M4.9 earthquake 78 km SSE of Koshima, Japan
A magnitude 4.9 earthquake struck 78 km SSE of Koshima, Japan on Sun, Dec 7, 1975, 6:43 PM JST (09:43 UTC), 25 km (16 mi) below the surface.
A larger quake followed: M5.1 45 km SE of Koseda, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.9 (mb), light
- Local time
- UTC
- 1975-12-07 09:43:58 UTC
- Depth
- 25.0 km (15.5 mi), shallow
- Epicenter
- 29.538° N, 130.703° 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
- 33
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.145 km SE of Koseda, Japan · 18551 days ago · 33 km deep · 76 km away
- 4.3121 km S of Yudomari, Japan · 18545 days ago · 51 km deep · 53 km away
- 4.723 km S of Yudomari, Japan · 18510 days ago · 111 km deep · 59 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000dut (also filed as iscgem720124). Read Wed, Sep 30, 2026, 6:45 AM UTC.