1992年インドネシア・フローレス島地震津波及び1993年北海道南西沖地震津波の調査

Abstract

The outline of damages due to the 1992 Flores Island Earthquake Tsunami and the 1993 Hokkaido Nansei-oki Earthquake Tsunami were presented. Both tsunamis inundated in the residential areas within five minutes. Through the questionnaire and field survey, tsunami characteristics and residents' behavior and warning systems were also described. Most residents in Flores Island have no knowledge on tsunamis and those in Okushiri Island, Hokkaido had not adequate information on tsunamis. In the former case, after looking at tsunami coming, they run away to safe places. In the latter case, tsunami warning issued by JMA took more than 10 min after the earthquake. Therefore, in both cases, the disaster weak such as children and old people might fell victim to the tsunami disaster. As disaster lessons, spread of tsunami information such as local tsunami characteristics and refuge programs are very important to mitigate the damages in tsunami-prone areas.