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The 1918 Celebes Sea earthquake occurred on August 15 at 12:18 UTC near the
The 1918 Celebes Sea earthquake occurred on August 15 at 12:18 UTC near the Moro Gulf
The Moro Gulf is the largest gulf in the Philippines. It is located off the coast of Mindanao Island, and is part of the Celebes Sea. The gulf is one of the country's tuna fishing grounds.
Geography
The gulf stretches between and is surrounde ...
coast of Mindanao
Mindanao ( ) ( Jawi: مينداناو) is the second-largest island in the Philippines, after Luzon, and seventh-most populous island in the world. Located in the southern region of the archipelago, the island is part of an island group of ...
. It had a magnitude of 8.3 on the moment magnitude scale
The moment magnitude scale (MMS; denoted explicitly with or Mw, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. It was defined in a 1979 pape ...
and a maximum perceived intensity of X (''Extreme'') on the Mercalli intensity scale
The Modified Mercalli intensity scale (MM, MMI, or MCS), developed from Giuseppe Mercalli's Mercalli intensity scale of 1902, is a seismic intensity scale used for measuring the intensity of shaking produced by an earthquake. It measures the eff ...
.
This event in the southern Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
triggered a large tsunami
A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explo ...
, with a maximum run-up of 7.2 m, which affected the coasts of the Celebes Sea, causing widespread damage. The combined effects of the earthquake and the tsunami caused 52 casualties.
The earthquake has been associated with the Cotabato Trench
The Cotabato Trench is an oceanic trench in the Pacific Ocean, off the southwestern coast of Mindanao in the Philippines. Along this trench the oceanic crust of the Sunda Plate beneath the Celebes Sea is being subducted beneath the Philippines ...
, the surface expression of an active east-dipping subduction zone
Subduction is a geological process in which the oceanic lithosphere is recycled into the Earth's mantle at convergent boundaries. Where the oceanic lithosphere of a tectonic plate converges with the less dense lithosphere of a second plate, the ...
beneath Mindanao.
See also
*1897 Mindanao earthquakes
The 1897 Mindanao earthquakes occurred on September 20, 1897, at 19:06 UTC and September 21, 1897, at 05:12 UTC. The estimated epicentres of the two earthquakes are identical, lying just off the southwestern coast of Mindanao in the Philippines ...
*1976 Moro Gulf earthquake
The 1976 Moro Gulf earthquake and tsunami took place on near the islands of Mindanao and Sulu, in the Philippines. Its magnitude was calculated as being as high as 8.0 on the moment magnitude scale.
It was the deadliest and strongest earthquak ...
*List of earthquakes in 1918
This is a list of earthquakes in 1918. Only magnitude 6.0 or greater earthquakes appear on the list. Lower magnitude events are included if they have caused death, injury or damage. Events which occurred in remote areas will be excluded from the ...
*List of earthquakes in the Philippines
The Philippines lies along the Pacific Ring of Fire, which causes the country to have frequent seismic and volcanic activity. Many earthquakes of smaller magnitude occur very regularly due to the meeting of major tectonic plates in the region. T ...
References
External links
* {{Earthquakes in the Philippines Earthquakes in the Philippines 1918 earthquakes History of Sarangani History of Sultan Kudarat 1918 tsunamis Megathrust earthquakes in the Philippines