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| 1976 Çaldıran-Muradiye earthquake ： ウィキペディア英語版 |
1976 Çaldıran–Muradiye earthquake
The 1976 Çaldıran–Muradiye earthquake occurred at 14:22 local time (12:22 UTC) on 24 November. The epicenter was located near Çaldıran, 20 km northeast of Muradiye, in the Van Province of eastern Turkey. The earthquake had a magnitude of 7.3 with a maximum intensity of X on the Mercalli intensity scale. The area of severe damage, where over 80% of the buildings were destroyed, covered an area of 2,000 square kilometres. There were between 4,000 and 5,000 casualties.〔
==Tectonic setting==
The easternmost part of Turkey lies within the complex zone of continuing continental collision between the Arabian Plate and the Eurasian Plate. The overall shortening that affects this area is accommodate partly by thrusting along the Bitlis-Zagros fold and thrust belt and partly by a mixture of sinistral strike-slip on SW-NE trending faults and dextral strike-slip on NW-SE trending faults. The earthquake was caused by movement on the Çaldıran Fault, one of the dextral faults, which had not been recognised before the earthquake.〔〔 No earthquakes with magnitudes of 6 or greater were recorded within 100 km of Çaldıran in the preceding 74 years, possibly explaining why it was considered an area of only intermediate seismic risk (zone 3 out of the five zone system of seismic risking used in Turkey at the time, with zone 1 being the highest).〔
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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