M4.6 earthquake 30 km E of Yonakuni, Japan
A magnitude 4.6 earthquake struck 30 km E of Yonakuni, Japan on Wed, Oct 29, 1986, 5:25 AM JST (20:25 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.9 60 km WNW 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), light
- Local time
- UTC
- 1986-10-28 20:25:18 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 24.517° N, 123.295° 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 2 in the 30 days before it.
After
- 4.960 km WNW of Yonakuni, Japan · 14565 days ago · 28 km deep · 87 km away
- 4.368 km SSW of Yonakuni, Japan · 14547 days ago · 33 km deep · 89 km away
- 4.751 km E of Yonakuni, Japan · 14547 days ago · 26 km deep · 21 km away
- 4.941 km NW of Yonakuni, Japan · 14541 days ago · 28 km deep · 63 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002zff. Read Tue, Sep 22, 2026, 9:38 AM UTC.