Japan earthquakes

M5.1 earthquake 117 km SSE of Shimoda, Japan

A magnitude 5.1 earthquake struck 117 km SSE of Shimoda, Japan on Tue, Dec 28, 1982, 10:23 AM JST (01:23 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M5.5 107 km SSE of Shimoda, Japan. This one was a foreshock.

Shimoda forecast More in Japan

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The earthquake

Magnitude: 5.1 (mb), moderate
Local time: Tue, Dec 28, 1982, 10:23 AM JST
UTC: 1982-12-28 01:23:47 UTC
Depth: 20.4 km (12.7 mi), shallow
Epicenter: 33.694° N, 139.432° 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 2.1 and up: 18 in the 60 days after this one and 5 in the 30 days before it.

After

Before

Earthquakes today Japan earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001rtb (also filed as iscgemsup587738). Read Tue, Sep 22, 2026, 5:28 PM UTC.