Japan earthquakes

M5.0 earthquake 31 km NNW of Yonakuni, Japan

A magnitude 5.0 earthquake struck 31 km NNW of Yonakuni, Japan on Thu, Mar 27, 1986, 1:20 AM GMT+8 (17:20 UTC), 32 km (20 mi) below the surface.

A larger quake followed: M5.1 62 km NE of Yonakuni, Japan. This one was a foreshock.

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The earthquake

Magnitude: 5.0 (mb), moderate
Local time: Thu, Mar 27, 1986, 1:20 AM GMT+8
UTC: 1986-03-26 17:20:35 UTC
Depth: 31.7 km (19.7 mi), shallow
Epicenter: 24.712° N, 122.845° 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: FROM_LOCATION

Nearest places

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

Nearby

Within 100 km, magnitude 2.0 and up: 27 in the 60 days after this one and 114 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002sag (also filed as iscgem501982). Read Tue, Sep 22, 2026, 12:15 PM UTC.