Japan earthquakes

M5.5 earthquake 93 km E of Hasaki, Japan

A magnitude 5.5 earthquake struck 93 km E of Hasaki, Japan on Mon, Aug 9, 1982, 9:46 AM JST (00:46 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.6 79 km ESE of Hitachi, Japan. This one was a foreshock.

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The earthquake

Magnitude: 5.5 (ms), moderate
Local time: Mon, Aug 9, 1982, 9:46 AM JST
UTC: 1982-08-09 00:46:07 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 35.655° N, 141.864° 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 2.5 and up: 6 in the 60 days after this one and 33 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001nx7 (also filed as gcmtb080982a, gcmt19820809004607, iscgem593386). Read Tue, Sep 22, 2026, 9:19 AM UTC.