1950 Calama earthquake

Earthquake in Chile 1950 Calama earthquake South America 1950-12-09 21:38:51 896170 iscgem896170 December 9, 1950 18:38:51 (UTC-3) w yes 8.2 113.9 km Normal Chile 7 1 dead, "several" injured -23.977 -67.912 inline,title region:GR_type:event thumb|right | alt=Map showing the earthquake's epicentre with a black star and colours radiating out from the star (dark orange to light blue) indicating the intensity of its impact | Macroseismic Intensity Map of the 1950 Calama earthquake The 1950 Calama earthquake occurred near the Argentina–Chile border with an epicenter near Calama, Chile in the Atacama Desert on December 9. The event had a hypocenter depth of 113.9 km, beneath the Caichinque volcanic complex. It measured magnitude w 8.2 on the moment magnitude scale, making it the largest intermediate-depth earthquake ever recorded on Chilean soil.M 8.2 - 121 km SSE of San Pedro de Atacama, Chile https://earthquake.usgs.gov/earthquakes/eventpage/iscgem896170/executive earthquake.usgs.gov U.S. Geological Survey 3 November 2021Los terremotos en Chile (1570-2010) Earthquakes in Chile (1570-2010) http://www.memoriachilena.gob.cl/602/w3-article-3576.html memoriachilena.gob.cl es-CL 16 April 2022 One person was killed and an unspecified number of people were injured in Calama.Significant Earthquake Information https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/3961 ngdc.noaa.gov NOAA National Centers for Environmental Information 3 November 2021 Tectonic setting Earthquakes are frequent in Chile as it lies in the so-called Pacific Ring of Fire, where many of the world's active volcanoes and seismic activities are concentrated at. Off the coast of Chile, the Nazca Plate subducts beneath the South American Plate along the Peru–Chile or Atacama Megathrust, producing large earthquakes including the 1960 Chilean earthquake which had a magnitude of 9.5–9.6 on the moment magnitude scale.Ruiz Madariaga Sergio Raúl February 2018 Historical and Recent Large Megathrust Earthquakes in Chile https://www.researchgate.net/publication/322508648 Tectonophysics 733 37–56 10.1016/j.tecto.2018.01.015 2018Tectp.733...37R In some cases, intraslab earthquakes occur. These earthquakes do not occur on the subduction interface; rather they happen as a result of faulting within the downgoing Nazca Plate. Intraslab earthquakes can occur anywhere within the slab, which may be deeper than 600 km. Earthquake The quake was an intermediate-depth event which ruptured within the Nazca Plate. There, the plate dips at an angle of 20°–30° to the east, beneath the South American Plate.S. Peyrat J. Campos J. B. de Chabalier A. Perez S. Bonvalot M.-P. Bouin D. Legrand A. Nercessian O. Charade G. Patau E. Clévédé E. Kausel P. Bernard J.-P. Vilotte Tarapacá intermediate-depth earthquake (Mw 7.7, 2005, northern Chile): A slab-pull event with horizontal fault plane constrained from seismologic and geodetic observations Geophysical Research Letters 28 November 2006 33 22 10.1029/2006GL027710 2006GeoRL..3322308P 53556522 free This was the result of extensional stress acting on the Nazca Plate at an intermediate depth. Based on its large seismic magnitude, the rupture area is estimated to be 6,000 km2, breaking through the thickness of the Nazca Plate along a vertically dipping normal fault.Edgar Kausel Jaime Campos The Ms = 8 tensional earthquake of 9 December 1950 of northern Chile and its relation to the seismic potential of the region Physics of the Earth and Planetary Interiors 1992 72 3–4 220–235 10.1016/0031-9201(92)90203-8 1992PEPI...72..220K B. Delouis T. Monfret L. Dorbath M. Pardo L. Rivera D. Comte H. Haessler J.P. Caminade L. Ponce E. Kausel A. Cisternas The Mw = 8.0 Antofagasta (Northern Chile) Earthquake of 30 July 1995" A Precursor to the End of the Large 1877 Gap Bulletin of the Seismological Society of America 1997 87 2 427–445 10.1785/BSSA0870020427 1997BuSSA..87..427D 129629213 See also List of earthquakes in 1950 List of earthquakes in Chile List of earthquakes in Argentina References Category:Earthquakes in Chile Category:Earthquakes in Argentina Category:1950 in Chile Category:1950 in Argentina Category:1950 earthquakes Category:History of Antofagasta Region Category:1950 disasters in Chile Category:1950 disasters in Argentina Category:1950 disasters in South America