M4.1 earthquake 32 km NE of Yonakuni, Japan
A magnitude 4.1 earthquake struck 32 km NE of Yonakuni, Japan on Sun, Mar 8, 1987, 12:25 AM JST (15:25 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 67 km N 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
- 4.1 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-03-07 15:25:42 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 24.658° N, 123.238° 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 1.5 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.867 km N of Yonakuni, Japan · 14452 days ago · 164 km deep · 47 km away
- 4.567 km WSW of Ishigaki, Japan · 14409 days ago · 50 km deep · 77 km away
Before
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000332t. Read Sun, Oct 4, 2026, 6:54 AM UTC.