Japan earthquakes

M4.9 earthquake 26 km WNW of Yonakuni, Japan

A magnitude 4.9 earthquake struck 26 km WNW of Yonakuni, Japan on Sat, Mar 22, 1986, 7:27 PM GMT+8 (11:27 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.0 59 km NNW 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
4.9 (mb), light
Local time
UTC
1986-03-22 11:27:38 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
24.550° N, 122.750° 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 1.9 and up: 102 in the 60 days after this one and 38 in the 30 days before it.

After

The first 60 of 102.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002s2s. Read Tue, Sep 22, 2026, 7:48 AM UTC.