抄録
This is a report on disaster of Hachijo-jima island (about 300km southwards from Tokyo) caused by the shock (M=7.2) that occurred in offshore Hachijo-jima island on February 29, 1972.
Intensity by this shock are V at Hochijo-jima island and IV in Kwanto area (JMA Intensity scale). The acceleration at the lobby of I. I. S. E. E. was 78 gals p-p (3Hz).
Luminous phenomenon was observed by many inhavitants.
Disasters distributed mainly the center and the southeastern part of the island. Damage concentrated on ledged roads and reservoirs.
Houses suffered lightly from the earthquake for its magnitude. It may come to this that the island is composed of igneous rocks and the houses are made strongly against horizontal stress as this island is in the zone of strong wind through the year.
