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July 1993 Hokkaido, Japan Images

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 23, 2026 | Last Modified: 2012-02-01T00:00:00.000+00:00
On July 12, 1993, a magnitude 7.6 Ms (7.7 Mw) (HRV) earthquake at 13:17 UT in the Sea of Japan near Hokkaido caused a back-arc tsunami that caused damage in all of the countries bordering the Sea of Japan. The earthquake had a rupture length of 150 kilometers, a movement of 2.5 meters and a dip to the east of 24 degrees. The tsunami was 32 meters high on Okishuri, Island, where the most destruction occurred. The whole island subsided by 5-80 centimeters.

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