1918 Celebes Sea earthquake

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1918 Celebes Sea earthquake
1918 Celebes Sea earthquake is located in Mindanao
Cotabato Trench
Cotabato Trench
1918 Celebes Sea earthquake is located in Philippines
1918 Celebes Sea earthquake
UTC time1918-08-15 12:18:21
ISC event913230
USGS-ANSSComCat
Local dateAugust 15, 1918 (1918-08-15)
Local time20:18
Magnitude8.3 Mw[1]
Depth20 km (12 mi)[1]
Epicenter5°58′01″N 124°22′37″E / 5.967°N 124.377°E / 5.967; 124.377Coordinates: 5°58′01″N 124°22′37″E / 5.967°N 124.377°E / 5.967; 124.377[1]
Max. intensityX (Extreme)
TsunamiYes
Casualties52
The Cotabato Trench in southern Mindanao and the Philippine Mobile Belt.
Earthquakes in Mindanao
1976
1976
1918
1918
2002
2002
Near the Cotabato Trench, two of the largest 20th century Philippine earthquakes: the 1918 Celebes Sea earthquake (8.3 Mw) and the 1976 Moro Gulf earthquake (8.0 Mw). Also included is the recent 2002 Mindanao earthquake (7.5 Mw). The Moro Gulf, part of the Celebes Sea, is labeled for context.

The 1918 Celebes Sea earthquake occurred on 15 August at 12:18 UTC near the Moro Gulf coast of Mindanao.[2] It had a magnitude of 8.3 on the moment magnitude scale[3] and a maximum perceived intensity of X (Extreme) on the Mercalli intensity scale.

This event in the southern Philippines triggered a large tsunami, with a maximum run-up of 7.2 m,[4] 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 surface expression of an active east-dipping subduction zone beneath Mindanao.[5]

See also[edit]

References[edit]

  1. ^ a b c "M 8.3 - Mindanao, Philippines". United States Geological Survey. August 15, 1918. Retrieved August 27, 2017.
  2. ^ "Comments for the Significant Earthquake". Significant Earthquake Database. National Geophysical Data Center. Retrieved 27 June 2015.
  3. ^ ISC (27 June 2015), ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009), Version 2.0, International Seismological Centre
  4. ^ "Comments for the Tsunami Event". NGDC/WDS Tsunami Event Database. National Geophysical Data Center. Retrieved 27 June 2015.
  5. ^ Stewart, G.S.; Cohn, S.N. (1979). "The 1976 August 16, Mindanao , Philippine earthquake (Ms = 7.8) - evidence for a subduction zone south of Mindanao". Geophysical Journal of the Royal Astronomical Society. 57 (1): 51–65. Bibcode:1979GeoJ...57...51S. CiteSeerX 10.1.1.926.8672. doi:10.1111/j.1365-246X.1979.tb03771.x.

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