Japan earthquakes

M5.2 earthquake 55 km E of ?hara, Japan

A magnitude 5.2 earthquake struck 55 km E of ?hara, Japan on Fri, Apr 7, 1978, 1:24 AM JST (16:24 UTC), 38 km (24 mi) below the surface.

A larger quake followed: M5.9 58 km E of ?hara, Japan. This one was a foreshock.

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The earthquake

Magnitude: 5.2 (ms), moderate
Local time: Fri, Apr 7, 1978, 1:24 AM JST
UTC: 1978-04-06 16:24:31 UTC
Depth: 38.0 km (23.6 mi), shallow
Epicenter: 35.240° N, 141.003° 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.

Stations used: 89

Nearest places

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

Nearby

Within 100 km, magnitude 2.2 and up: 10 in the 60 days after this one and 6 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000ty6 (also filed as iscgem683385). Read Tue, Sep 22, 2026, 7:30 AM UTC.