M5.0 earthquake 32 km NNW of Yonakuni, Japan

A magnitude 5.0 earthquake struck 32 km NNW of Yonakuni, Japan on Wed, Mar 19, 1986, 11:00 AM GMT+8 (03:00 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.8 29 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.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
5.0	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · 16 stations
5.33	Mw, moment	ISC-GEM global catalog	Final · ±0.2

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 2.0 and up: 130 in the 60 days after this one and 8 in the 30 days before it.

The first 60 of 130.

From the USGS Earthquake Hazards Program and its partner networks, event usp0002ryy (also filed as iscgem500850). Read Sun, Oct 4, 2026, 6:39 PM UTC.