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Moro Gulf, Mindanao, Philippines: 1976 Moro Gulf earthquake: Earthquake: On 17 August 1976 at 00:11, a magnitude 7.9 earthquake struck the island of Mindanao, Philippines. The resulting tsunami devastated more than 700 km (430 mi) of coastline bordering the Gulf of Moro in the North Celebes Sea. Estimated casualties included 5,000 dead, 2,200 ...
Tsunami damage at Barangay Tibpuan, Lebak, Mindanao. Several fault zones in the region are capable of producing major earthquakes and destructive local tsunamis. The two major fault zones that are most dangerous are the Sulu Trench in the Sulu Sea and the Cotabato Trench, a region of subduction that crosses the Celebes Sea and the Moro Gulf in Southern Mindanao.
Much of the Philippines lie within the area of strongly tectonised blocks of mainly island arc origin, known as the Philippine Mobile Belt. To the east, Philippine Sea plate is subducting beneath the mobile belt along the line of the Philippine Trench and the East Luzon Trench at the northern end of the belt.
Ten deadliest recorded earthquakes in the Philippines since the 1600s Magnitude Origin Location Date Mortality Missing Injured Damages Source 1 7.9 Tectonic Moro Gulf: August 16, 1976 4791 2288 9928 2 7.8 Tectonic Luzon Island: July 16, 1990 1621 1000 More than 3000 ₱10 billion 3 7.5 Tectonic Luzon Island: November 30, 1645 More than 600
The Pacific Tsunami Warning Center also said that they expected tsunami waves to be as high as 1–3 m (3.3–9.8 ft) in the Philippines, 0.3–1 m (0.98–3.28 ft) in Palau, and less than 0.3 m (0.98 ft) in American Samoa, China, South Korea, a majority of Polynesia, Melanesia and Micronesia, Hawaii, Indonesia, Japan, Taiwan and Malaysia. [16]
The Pacific Tsunami Warning Center said it expected tsunami waves to hit the southern Philippines and parts of Indonesia, Palau and Malaysia, but later dropped its tsunami warning.
This event in the southern Philippines triggered a large tsunami, with a maximum run-up of 7.2 m, [8] which affected the coasts of the Celebes Sea, causing widespread damage. The combined effects of the earthquake and the tsunami caused 52 casualties. With some sources stating that the tsunami alone caused up to 1,000 casualties.
PHIVOLCS Observatory at Mount Hibok-Hibok.. The Philippine Institute of Volcanology and Seismology (PHIVOLCS, Tagalog:; Tagalog: Surian ng Pilipinas sa Bulkanolohiya at Sismolohiya [2]) is a Philippine national institution dedicated to provide information on the activities of volcanoes, earthquakes, and tsunamis, as well as other specialized information and services primarily for the ...