The Gediz earthquake of March 28, 1970 in western Anatolia, Turkey, killed 1,086 people and heavily damaged 12,234 houses. Faults of 61-km length were produced in the Gediz area; in general, they strike north or east and are left-lateral normal faults. Vertical displacement reached 2 m in crystalline rock. Rockfalls and landslides were common, and thermal springs were initiated in some areas. Historic records indicate that the maximum previous intensity in this area was VIII, but the local intensity of this earthquake was about IX. The basement rocks of the area are crystalline schists, but the severest damage occurred in areas of Neogene outcrop.

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