Japan earthquakes

M5.0 earthquake 23 km NE of Yonakuni, Japan

A magnitude 5.0 earthquake struck 23 km NE of Yonakuni, Japan on Sun, Mar 23, 1986, 2:55 AM JST (17:55 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.3 43 km NNE of Yonakuni, Japan. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
5.0 (mb), moderate
Local time
UTC
1986-03-22 17:55:04 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
24.617° N, 123.160° 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 2.0 and up: 75 in the 60 days after this one and 63 in the 30 days before it.

After

The first 60 of 75.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002s3u. Read Tue, Sep 22, 2026, 5:15 PM UTC.