Japan earthquakes

M5.1 earthquake 46 km NW of Yonakuni, Japan

A magnitude 5.1 earthquake struck 46 km NW of Yonakuni, Japan on Mon, Mar 24, 1986, 10:33 AM GMT+8 (02:33 UTC), 31 km (20 mi) below the surface.

A larger quake followed: M5.2 42 km NNE of Yonakuni, Japan. This one was a foreshock.

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The earthquake

Magnitude: 5.1 (mb), moderate
Local time: Mon, Mar 24, 1986, 10:33 AM GMT+8
UTC: 1986-03-24 02:33:57 UTC
Depth: 31.4 km (19.5 mi), shallow
Epicenter: 24.773° N, 122.679° 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.

Nearest places

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

Nearby

Within 100 km, magnitude 2.1 and up: 44 in the 60 days after this one and 96 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002s6m (also filed as iscgem501598). Read Tue, Sep 22, 2026, 10:17 AM UTC.