M4.2 earthquake 95 km SSE of Toba, Japan
A magnitude 4.2 earthquake struck 95 km SSE of Toba, Japan on Sun, Dec 29, 1985, 8:11 AM JST (23:11 UTC), 354 km (220 mi) below the surface.
A larger quake followed: M4.8 98 km SE of Toba, 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1985-12-28 23:11:01 UTC
- Depth
- 354.3 km (220.2 mi), deep
- Epicenter
- 33.723° N, 137.326° 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.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 3.9165 km S of ?yama, Japan · 14882 days ago · 333 km deep · 100 km away
- 4.4176 km S of ?yama, Japan · 14874 days ago · 342 km deep · 97 km away
- 4.898 km SE of Toba, Japan · 14856 days ago · 18 km deep · 13 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002phs. Read Thu, Oct 1, 2026, 12:08 PM UTC.