M4.6 earthquake 47 km E of Yonakuni, Japan
A magnitude 4.6 earthquake struck 47 km E of Yonakuni, Japan on Fri, Aug 2, 1985, 5:52 AM JST (20:52 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.1 14 km NW of Yonakuni, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1985-08-01 20:52:16 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 24.467° N, 123.465° 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.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.965 km NE of Yonakuni, Japan · 15022 days ago · 118 km deep · 42 km away
- 4.152 km WNW of Yonakuni, Japan · 15012 days ago · 10 km deep · 98 km away
- 3.820 km N of Yonakuni, Japan · 15006 days ago · 33 km deep · 54 km away
- 5.114 km NW of Yonakuni, Japan · 14997 days ago · 106 km deep · 59 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002ha5. Read Fri, Oct 2, 2026, 6:57 AM UTC.