Copyright Information: All images are in the public domain and available for free. If you use this image, credit NOAA/NGDC, Commander Dennis J. Sigrist, International Tsunami Information Center. |
On the west side of Okushiri Island many locations experienced a maximum runup exceeding 20 m. This small valley leading to the ocean experienced a spectacular runup of 31 m. Note the debris in the foreground, including a broken steel reinforced concrete utility pole. Discolored and dead plants and grasses are evident on the hillside. Image Credit: Commander Dennis J. Sigrist. International Tsunami Information Center July 12, 1993 Hokkaido Japan earthquake and tsunami 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. Event Data:
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