M4.9 earthquake 16 km E of Naze, Japan
A magnitude 4.9 earthquake struck 16 km E of Naze, Japan on Wed, Sep 25, 1985, 6:16 AM JST (21:16 UTC), 50 km (31 mi) below the surface.
A larger quake followed: M5.2 68 km WNW of Naze, 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
- 1985-09-24 21:16:46 UTC
- Depth
- 49.7 km (30.9 mi), shallow
- Epicenter
- 28.388° N, 129.650° 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 1.9 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.7100 km NE of Naze, Japan · 14940 days ago · 52 km deep · 87 km away
- 5.268 km WNW of Naze, Japan · 14925 days ago · 135 km deep · 82 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002k32. Read Wed, Sep 30, 2026, 1:52 AM UTC.