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,[1][2] but these were revised downwards by Katsuyuki Abe to 7.4 and 7.5 Ms, respectively.[3] Contemporary reports noted that with few exceptions, all the masonry buildings in Zamboanga and Basilan were left in ruins.[4]
Both earthquakes triggered tsunamis, with the second being quite destructive, with a maximum run-up of 7.0 m.[5] 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.[6] At least 13 died as a result of the second tsunami, with a hundred or more casualties also being reported.[2]
^National Geophysical Data Center (1972). "Significant Earthquake Information (20/9)". NCEI/WDS Global Significant Earthquake Database. National Geophysical Data Center/ World Data Service (NGDC/WDS). doi:10.7289/V5TD9V7K. Retrieved August 2, 2022.
^ abNational Geophysical Data Center (1972). "Significant Earthquake Information (21/9)". NCEI/WDS Global Significant Earthquake Database. National Geophysical Data Center/ World Data Service (NGDC/WDS). doi:10.7289/V5TD9V7K. Retrieved August 2, 2022.
^Ye L., Lay T. & Kanamori H. (2012). "Intraplate and interplate faulting interactions during the August 31, 2012, Philippine Trench earthquake (M w 7.6) sequence". Geophysical Research Letters. L24310 (24): n/a. Bibcode:2012GeoRL..3924310Y. doi:10.1029/2012GL054164.
^Coronas, José (1899). La actividad séismica en el Archipiélago filipino durante el año 1897 (in Spanish). Manila Observatory: Tipolitografía del Observatorio.
^National Geophysical Data Center. "Tsunami Event Information (21/9)". NGDC/WDS Global Tsunami Event Database. National Geophysical Data Center/ World Data Service. doi:10.7289/V5PN93H7. Retrieved August 2, 2022.
^Saderra Masó, Miguel (1904). Volcanoes and seismic centers of the Philippine Archipelago. Census of the Philippine Islands. Vol. Bulletin 3. Bureau of the Census. pp. 42–44.
November 27, 2023
1897, mindanao, earthquakes, occurred, september, 1897, september, 1897, estimated, epicentres, earthquakes, identical, lying, just, southwestern, coast, mindanao, philippines, south, basilan, island, earthquakes, were, originally, given, estimated, magnitudes. 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 1 2 but these were revised downwards by Katsuyuki Abe to 7 4 and 7 5 Ms respectively 3 Contemporary reports noted that with few exceptions all the masonry buildings in Zamboanga and Basilan were left in ruins 4 1897 Mindanao earthquakesBanguingui SuluShow map of MindanaoShow map of PhilippinesLocal dateSeptember 20 1897 1897 09 20 September 21 1897 1897 09 21 Magnitude7 4 7 5 MsEpicenter6 00 N 122 00 E 6 0 N 122 0 E 6 0 122 0Max intensityVII Very strong IX Violent TsunamiBothCasualtiesNone reported 13 to 100 Both earthquakes triggered tsunamis with the second being quite destructive with a maximum run up of 7 0 m 5 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 6 At least 13 died as a result of the second tsunami with a hundred or more casualties also being reported 2 See also edit1918 Celebes Sea earthquake 1976 Moro Gulf earthquake List of earthquakes in the Philippines List of historical earthquakesReferences edit National Geophysical Data Center 1972 Significant Earthquake Information 20 9 NCEI WDS Global Significant Earthquake Database National Geophysical Data Center World Data Service NGDC WDS doi 10 7289 V5TD9V7K Retrieved August 2 2022 a b National Geophysical Data Center 1972 Significant Earthquake Information 21 9 NCEI WDS Global Significant Earthquake Database National Geophysical Data Center World Data Service NGDC WDS doi 10 7289 V5TD9V7K Retrieved August 2 2022 Ye L Lay T amp Kanamori H 2012 Intraplate and interplate faulting interactions during the August 31 2012 Philippine Trench earthquake M w 7 6 sequence Geophysical Research Letters L24310 24 n a Bibcode 2012GeoRL 3924310Y doi 10 1029 2012GL054164 Coronas Jose 1899 La actividad seismica en el Archipielago filipino durante el ano 1897 in Spanish Manila Observatory Tipolitografia del Observatorio National Geophysical Data Center Tsunami Event Information 21 9 NGDC WDS Global Tsunami Event Database National Geophysical Data Center World Data Service doi 10 7289 V5PN93H7 Retrieved August 2 2022 Saderra Maso Miguel 1904 Volcanoes and seismic centers of the Philippine Archipelago Census of the Philippine Islands Vol Bulletin 3 Bureau of the Census pp 42 44 Retrieved from https en wikipedia org w index php title 1897 Mindanao earthquakes amp oldid 1148269510, wikipedia, wiki, book, books, library,
