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August 1976 Moro Gulf, Philippines Images

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 23, 2026 | Last Modified: 2012-02-01T00:00:00.000+00:00
On August 16, 1976, at 16:11:07 UTC, a magnitude (Mw) 8.0 earthquake shook Mindanao Island in the Philippines. It caused a destructive tsunami in the Celebes Sea that devastated settlements along the coast of Moro Gulf on Mindanao Island, Zamboanga Peninsula and Sulu Islands. As a result of the earthquake and tsunami 4,000 to 8,000 persons were killed or missing, 10,000 were injured, and 90,000 were left homeless. 85% of the casualties may be attributed to the tsunami.

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