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1938 Banda Sea earthquake
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1938 Banda Sea earthquake
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title | 1938 Banda Sea earthquake|image = |imagecaption =
| w | LAST2=PRANANTYO | LAST3=POWNALL | LAST4=GRIFFIN | LAST5=MEILANO | LAST6=ZHOU | TITLE=EARTHQUAKES AND TSUNAMIS CAUSED BY LOW-ANGLE NORMAL FAULTING IN THE BANDA SEA, INDONESIA | DATE=APRIL 2020 | ISSUE=4 | DOI=10.1038/S41561-020-0545-X | HDL=10138/327490 | URL=HTTPS://DOI.ORG/10.1038/S41561-020-0545-X | TITLE=SECULAR SEISMIC ENERGY RELEASE IN THE CIRCUM-PACIFIC BELT | DATE=1965 | ISSUE=5 | DOI=10.1016/0040-1951(65)90035-1 | URL=HTTPS://DOI.ORG/10.1016/0040-1951(65)90035-1, 15 August 2022, | 7}} | 60 | abbr=on}} | -5.05 | display=inline,title}} | Fault (geology)#Oblique-slip faults>Oblique-slip|countries affected = |tsunami = Yes|casualties = None}}The 1938 Banda Sea earthquake occurred on February 2 with an estimated magnitude of 8.5â8.6 on the moment magnitude scale and a RossiâForel intensity of VII (Very strong tremor). This oblique-slip event generated destructive tsunamis of up to 1.5 metres in the Banda Sea region, but there were no deaths.Tectonic settingThe Banda Sea is located within a very complex tectonic regime that accommodates the convergence between the Australian Plate and the Sunda Plate. The Molucca Sea Plate, Bird's Head Plate, Timor Plate, and Banda Sea Plate all help accommodate the elaborate plate boundary system in the region.BOOK, Nuretdin Kaymakci, John Decker, Dan Orange, Philip Teas, Pieter van Heiningen, International Conference and Exhibition, Melbourne, Australia 13-16 September 2015, Tectonic Characteristics and Evolution Banda Sea Region, 2015, 90, 10.1190/ice2015-2205090,weblink SEG Library, 131074367, 2159-6832, JOURNAL, Bird, P., An updated digital model of plate boundaries, Geochem. Geophys. Geosyst., 2003, 4, 3, 1027, 10.1029/2001GC000252, 2003GGG.....4.1027B, 9127133,weblink 2 August 2022, free, This collection of microplates leads to large amounts of seismicity in the area, including the 1852 Banda Sea earthquake which was potentially a {{M|w}} 8.8 event, as well as the 1629 Banda Sea earthquake which was also estimated at up to {{M|w}} 8.8.JOURNAL, Fisher, TszMan L., Harris, Ron, Reconstruction of 1852 Banda Arc megathrust earthquake and tsunami. Natural Hazards, Natural Hazards, August 2016, 83, 1, 10.1007/s11069-016-2345-6, 2016NatHa..83..667F, 131107365,weblink 15 August 2022, JOURNAL, H. Ringer, J. P. Whitehead, J. Krometis, R. A. Harris, N. Glatt-Holtz, S. Giddens, C. Ashcraft, G. Carver, A. Robertson, M. Harward, J. Fullwood, K. Lightheart, R. Hilton, A. Avery, C. Kesler, M. Morrise, M. H. Klein, Methodological Reconstruction of Historical Seismic Events From Anecdotal Accounts of Destructive Tsunamis: A Case Study for the Great 1852 Banda Arc Mega-Thrust Earthquake and Tsunami, Journal of Geophysical Research: Solid Earth, 15 March 2021, 126, 4, 10.1029/2020JB021107,weblink 14 August 2022, 2009.14272, 2021JGRB..12621107R, 222066748, JOURNAL, Major, Jonathan Robert, Liu, Zac Yung-Chun, Harris, Ron, Fisher, T. L., Source of 1629 Banda Mega-Thrust Earthquake and Tsunami: Implications for Tsunami Hazard Evaluation in Eastern Indonesia, AGU Fall Meeting Abstracts, December 2011, 2011, 1376, 2011AGUFMNH13B1376M,weblink 15 August 2022,EarthquakeAt around 04:00 local time, a large earthquake started to shake the Banda islands. With a moment magnitude ({{M|w}}) of 8.5â8.6, the earthquake caused a destructive tsunami of 1 meter at the Kai islands. The tsunami expected for an earthquake of this size is much greater, such as of those in 1629 and 1852, however this earthquake occurred at a depth of 60km which impeded much of the ocean floor displacement which leads to a tsunami. This earthquake is of significant scientific interest as it remains a mystery as to precisely which fault produced this earthquake. Some studies consider this earthquake the largest intraslab earthquake we know of.TsunamiDespite being a large thrust faulting event, the tsunami was rather small. This is assumed to be caused by the 60 kilometer depth. At the Kai islands, runups of 1 meter were recorded. Beachfront damage was reported across the Tayandu Islands and the entire Banda region.See alsoReferencesExternal links
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