Tsunami Disaster Caused by 1993 Earthquake in Northern Part of Japan Sea

Yoshitaka Hayashi


At 10:17 p.m. on the 12th of July 1993, a large earthquake (magnitude 7.8) occurred in the southwest of Hokkaido, Japan (Figure 1). Only 5 minutes after the earthquake occurred, a warning for a tsunami was issued by the Japan Meteorological Agency. The tsunami hit the coast of the Okushiri Island, situated 50 km from the mainland. Damage was mainly caused by the tsunami and liquefaction. Official reports stated that 239 people were killed or missing and 558 houses were completely destroyed. Okushiri Island sustained the most damage.

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