M4.4 earthquake 171 km S of ?yama, Japan
A magnitude 4.4 earthquake struck 171 km S of ?yama, Japan on Wed, Oct 30, 1985, 8:29 PM JST (11:29 UTC), 341 km (212 mi) below the surface.
A larger quake followed: M4.7 197 km SE of Shing?, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.4 (mb), light
- Local time
- UTC
- 1985-10-30 11:29:55 UTC
- Depth
- 341.2 km (212.0 mi), deep
- Epicenter
- 33.089° N, 137.859° 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: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.080 km S of Hamamatsu, Japan · 14928 days ago · 400 km deep · 99 km away
- 4.7197 km SE of Shing?, Japan · 14913 days ago · 392 km deep · 87 km away
- 4.2198 km S of ?yama, Japan · 14903 days ago · 311 km deep · 30 km away
- 4.295 km SSE of Toba, Japan · 14885 days ago · 354 km deep · 86 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002ma7. Read Wed, Sep 30, 2026, 8:00 AM UTC.