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1825 Blida earthquake
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Earthquake in Algeria
1825 Blida earthquake yes 2 March 1825 07:00 w yes 7.0Hamdache M. Peláez J.A. Talbi A. Casado C.L. 2010 A Unified Catalog of Main Earthquakes for Northern Algeria from A.D. 856 to 2008 https://www.researchgate.net/profile/Jose-Pelaez-9/post/Empirical-relationship-between-intensity-and-magnitude-Mw-and-between-Mw-and-Mb-Ms-for-west-of-mediterranean-sea-and-california-region/attachment/59d6284c79197b8077986ace/AS%3A329681883680768%401455613694193/download/2010+Hamdache+et+al.pdf Seismological Research Letters 81 5 732–739 10.1785/gssrl.81.5.732 2010SeiRL..81..732H 36.5 N 2.9 E inline,title Blida, Algeria X >6,000 dead
The city of Blida in Algeria was struck by a major earthquake on 2 March 1825. It had an estimated magnitude of 7.0 w yes and a maximum felt intensity of X (Extreme) on the Modified Mercalli scale. It caused almost the complete destruction of Blida and led to the deaths of at least 6,000 of the inhabitants.Harbi A. Sebaï A. Rouchiche Y. Maouche S. Ousadou F. Abbès K. Benamar D.A. Benmedjber M. 2017 Electronic Supplement to: Reappraisal of the Seismicity of the Southern Edge of the Mitidja Basin (Blida Region, North-Central Algeria) http://www.seismosoc.org/Publications/SRL/SRL_88/srl_88-4_harbi_et_al-esupp/ 10 November 2021 Seismological Research Letters
Tectonic setting
Northern Algeria lies within the complex belt of collision between the African plate and the Eurasian plate. Blida is located at the southern margin of the Mitidja Basin, which is filled with Neogene aged sedimentary rocks. The southern boundary to this basin is formed by thrust faults of the Blida fold and thrust belt.Ayadi A. Maouche S. Harbi A. Meghraoui M. Beldjoudi H. Oussadou F. Mahsas A. Benouar D. Heddar A. Rouchiche Y. Kherroubi A. Frogneux M. Lammali K. Benhamouda F. Sebai A. Bourouis S. Alasset P.J. Cakir Z. Merahi M. Nouar O. Yelles A. Bellik A. Briole P. Charade O. Thouvenet F. Semane F. Ferkoul A. Deramchi A. Haned S.A. 2003 Strong Algerian Earthquake Strikes Near Capital City https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2003EO500002 Eos 84 50 561 10.1029/2003EO500002 subscription The rupture of a fault within an offshore continuation of this zone, further to the northeast, is thought to have been responsible for the 2003 Boumerdès earthquake.Ayadi A. Dorbath C. Ousadou F. Maouche S. Chikh M. Bounif M.A. Meghraoui M. 2018 Zemmouri earthquake rupture zone (Mw 6.8, Algeria): Aftershocks sequence relocation and 3D velocity model Journal of Geophysical Research: Solid Earth 113 B9 10.1029/2007JB005257 free
Earthquake
The earthquake occurred at 07:00 local time. The maximum intensity of X on the Modified Mercalli scale has been used to estimate the magnitude as w 7.0. Over the next four days, there were ten significant aftershocks.
Damage
The earthquake devastated Blida leaving very few buildings standing. It had no significant effects on Algiers, apart from some possible damage to the Casbah, although the city was only 50 km away from the epicentre. There were reports of widespread ground fissuring and both wells and springs were said to have dried up in the hours before the earthquake.
The total number of people killed was reported to be at least 6,000 and possibly much higher. The high death toll is explained by the timing of the earthquake during prayers, leaving many people crushed by collapsed mosques.
References
Category:March 1825
Category:Earthquakes in Algeria
Category:1825 earthquakes
Category:19th-century disasters in Algeria
Category:1825 disasters in Africa
Category:19th century in the Regency of Algiers