Japan earthquakes

M5.0 earthquake 23 km S of Asahi, Japan

A magnitude 5.0 earthquake struck 23 km S of Asahi, Japan on Thu, Aug 5, 1982, 9:23 AM JST (00:23 UTC), 56 km (35 mi) below the surface.

A larger quake followed: M5.1 26 km E of ?hara, Japan. This one was a foreshock.

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The earthquake

Magnitude: 5.0 (mb), moderate
Local time: Thu, Aug 5, 1982, 9:23 AM JST
UTC: 1982-08-05 00:23:49 UTC
Depth: 56.3 km (35.0 mi), shallow
Epicenter: 35.508° N, 140.695° 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 2.0 and up: 6 in the 60 days after this one and 9 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001nup (also filed as iscgemsup593144). Read Wed, Sep 23, 2026, 5:19 AM UTC.