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1976 Bali earthquake
The 1976 Bali earthquake occurred at with a moment magnitude of 6.5. The shock occurred south of the Bali Sea coast of the Buleleng Regency, and about northwest of Denpasar. The temblor seriously damaged or destroyed up to ninety percent of houses in Buleleng Regency and caused the almost complete destruction of Seririt sub-district, where a school building collapsed and trapped at least 200 students. 573 people are believed to have died as a result of the temblor; at least 544 in Buleleng Regency, 24 in Jembrana and 5 in Tabanan. Four thousand more suffered injuries and an estimated 450,000 were left temporarily homeless.
==Tectonic setting==
The island of Bali forms part of the Sunda Arc, which formed above the convergent boundary where the Australian Plate is subducting beneath the Sunda Plate. The rate of convergence across the line of the Sunda–Java Trench is 7.5 cm per year. Eastwards from Bali, the Sunda Arc is also being thrust over the Bali and Flores back-arc basins on a series of south-dipping thrusts. Focal mechanisms for earthquakes near Bali are dominantly thrust sense on both the subduction interface and the system of thrust faults to the north.
A previous earthquake of 6.6 Ms southeast of Bali on 21 January 1917 had caused 1500 casualties on the island. A subsequent earthquake of 6.5 Ms southeast of Karangasem Regency on 18 December 1979 caused 27 deaths on the island and displaced a similar number of people as the 1976 temblor.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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