1969 Alaşehir earthquake

Earthquake in Turkey 1969 Alaşehir earthquake 1969-03-28 01:48:32 811616 iscgem811616 1969 03 28 03:48:32 Turkey 10 kmISC-GEM Global Instrumental Earthquake Catalogue (1900–2009) http://www.isc.ac.uk/iscgem/index.php ISC 27 June 2022 International Seismological Centre Version 9.1 38.515 28.546 inline,title w y 6.8 8B. Eravcı C. Erkmen M. Yaman B. Tüzel Y. Iravu The Origin of Ground Deformations that Caused Damage at Sarigol-Manisa -Turkey Geophysical Research Abstracts 2009 11 2655 European Geosciences Union 2009EGUGA..11.2655E Turkey 53 dead The 1969 Alaşehir earthquake occurred on March 28 at 03:48 local time near the city of Alaşehir in Turkey's Manisa Province. The w 6.8 earthquake struck at 10 km depth. It had a MSK 64 intensity of VIII (Destructive).https://deprem.afad.gov.tr/tarihteBuAy?id=76 28 MART 1969 MANİSA DEPREMİ AFAD tr 5 January 2022 At least 53 people were killed in the earthquake.Significant Earthquake Information https://www.ngdc.noaa.gov/hazel/view/hazards/earthquake/event-more-info/4482 ngdc.noaa.gov NOAA National Centers for Environmental Information 5 January 2022 Tectonic setting The Alaşehir region is dominated by extensional faulting in the young sedimentary layers. Extension accommodated by normal faults cause uplift in the land, forming graben features. Earthquakes in this region have pure normal dip-slip mechanism with no strike-slip components. These earthquakes occur along faults that are parallel to the grabens. Faults in the area have a dip angle of 30–60° and extend down to 12 km beneath the surface. Earthquake The earthquake occurred in the Alaşehir Valley where normal faulting was the mechanism; occurring along a northwest–southeast striking, northeast dipping plane. Surface ruptures developed in the valley where the earthquake occurred. At least six surface ruptures were traced uninterrupted for long distances. The longest rupture was measured more than 12 km long. The total length of measured surface rupture was 30–36 km; extending from Dereköy, through Alaşehir and terminating at Doğuşlar. An average surface offset of 20 cm was measured. However the measurement was recorded a week after the event hence aseismic creep may have occurred and contaminated actual coseismic offset measurements.Haluk Eyidoğan James Jackson A seismological study of normal faulting in the Demirci, Alaşehir and Gediz earthquakes of 1969–70 in western Turkey: implications for the nature and geometry of deformation in the continental crust Geophysical Journal International 1985 81 3 569–607 10.1111/j.1365-246X.1985.tb06423.x 1985GeoJ...81..569E free An intense aftershock sequence followed the mainshock. One of these aftershocks was recorded b 4.6. Felt report of aftershocks by locals have been debunked as separate seismic activity in Demirci, where another severe earthquake occurred on March 23. Impact At least 53 people died. Land failure and landslides on the slopes of the valleys contributed to heavy damage. Many small villages suffered great destruction. At least 3,072 buildings were damaged or destroyed.Important earthquakes in Turkey in 1900-2004 that have caused casualties and damage (Ms > 5.0) http://www.koeri.boun.edu.tr/sismo/depremler/tlarge1.htm tr koeri.boun.edu.tr Kandilli Observatory 6 January 2022 The Demirköprü Dam however, was undamaged. See also List of earthquakes in 1969 List of earthquakes in Turkey References External links 811616 Category:Earthquakes in Turkey Alaşehir Alaşehir Earthquake Alaşehir 1969 Earthquake Category:Geography of Manisa Province Category:History of Manisa Province Category:1969 disasters in Turkey Category:March 1969 in Turkey