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1897 Mindanao earthquakes
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Earthquakes in the Philippines
December 2022
December 2022
1897 Mindanao earthquakes
yes
1897 09 20, 1897 09 21
7.4, 7.5 Ms
6.0 122.0 inline,title
VII IX
Both
None reported, 13 to 100+
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, south of Basilan island. The earthquakes were originally given estimated magnitudes of 8.6 and 8.7 on the surface-wave magnitude scale by Charles Richter,https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/2519 Significant Earthquake Information (20/9) National Geophysical Data Center/ World Data Service (NGDC/WDS) NCEI/WDS Global Significant Earthquake Database 1972 August 2, 2022 10.7289/V5TD9V7K National Geophysical Data Centerhttps://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/2520 Significant Earthquake Information (21/9) National Geophysical Data Center/ World Data Service (NGDC/WDS) NCEI/WDS Global Significant Earthquake Database 1972 August 2, 2022 10.7289/V5TD9V7K National Geophysical Data Center but these were revised downwards by Katsuyuki Abe to 7.4 and 7.5 s y, respectively.Intraplate and interplate faulting interactions during the August 31, 2012, Philippine Trench earthquake (M w 7.6) sequence Ye L., Lay T. & Kanamori H. Geophysical Research Letters 2012 L24310 24 n/a 10.1029/2012GL054164 2012GeoRL..3924310Y free Contemporary reports noted that with few exceptions, all the masonry buildings in Zamboanga and Basilan were left in ruins.La actividad séismica en el Archipiélago filipino durante el año 1897 José Coronas Tipolitografía del Observatorio 1899 es https://books.google.com/books?id=w28RAAAAIAAJ Manila Observatory
Both earthquakes triggered tsunamis, with the second being quite destructive, with a maximum run-up of 7.0 m.https://www.ngdc.noaa.gov/hazel/view/hazards/tsunami/event-more-info/1244 Tsunami Event Information (21/9) National Geophysical Data Center/ World Data Service NGDC/WDS Global Tsunami Event Database August 2, 2022 10.7289/V5PN93H7 National Geophysical Data Center The tsunami was noted all along the southwest coast of Negros, the west coast of Panay, the south coast of Palawan, the west coast of Mindanao, and the east coast of Borneo.Volcanoes and seismic centers of the Philippine Archipelago Census of the Philippine Islands Bulletin 3 Miguel Saderra Masó https://books.google.com/books?id=UIgNAAAAYAAJ&pg=PA42 Bureau of the Census 1904 42–44 At least 13 died as a result of the second tsunami, with a hundred or more casualties also being reported.
See also
1918 Celebes Sea earthquake
1976 Moro Gulf earthquake
List of earthquakes in the Philippines
List of historical earthquakes
References
Category:Earthquakes in the Philippines
Category:1897 earthquakes
Category:History of Basilan
Category:History of Zamboanga City
Category:History of Sulu
Category:September 1897 in Asia
Category:1897 in the Spanish East Indies
Category:1890s disasters in Asia
Category:19th-century disasters in the Philippines