Japan earthquakes

M7.1 earthquake 93 km ENE of Hasaki, Japan

A magnitude 7.1 earthquake struck 93 km ENE of Hasaki, Japan on Fri, Jul 23, 1982, 11:23 PM JST (14:23 UTC), 37 km (23 mi) below the surface.

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Map

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

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The earthquake

Magnitude: 7.1 (mw), major
Local time: Fri, Jul 23, 1982, 11:23 PM JST
UTC: 1982-07-23 14:23:53 UTC
Depth: 36.6 km (22.7 mi), shallow
Epicenter: 36.194° N, 141.702° E
Region: Japan
Strongest shaking: V, moderate shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: V, moderate shaking
Peak ground acceleration: 8.1% of gravity
Peak ground velocity: 2.5 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

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 2.5 and up: 38 in the 60 days after this one and 13 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001nkk (also filed as gcmtc072382a, gcmt19820723142353, atlas19820723142353, iscgem595845). Read Tue, Sep 22, 2026, 8:50 PM UTC.