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2016 Alboran Sea earthquake
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Earthquake off the coast of Morocco
March 2024
2016 Alboran Sea earthquake 2016-01-25 04:22:02 25 January 2016 608278395 us10004gy9 #Morocco #Spain Strike-slip 6.3–6.4 w y6.3 s y 12 km on 35.649 -3.682 inline,title Morocco & Spain 6 1 dead, ~30 injured One recorded >2350 recorded from 25 Jan to 13 May
The 2016 Alboran Sea earthquake struck offshore, north northeast of Al Hoceïma, Morocco in the Strait of Gibraltar on 25 January at 04:22:02 UTC, or roughly 05:22:02 West Africa Time. At its strongest in the Alboran Sea, the earthquake measured 6.3–6.4 on the moment magnitude scale (w) at a shallow hypocenter depth of 12 km on.EMSC M 6.3 – STRAIT OF GIBRALTAR – 2016-01-25 04:22:02 UTC https://www.emsc-csem.org/Earthquake/earthquake.php?id=484213 emsc-csem.org European-Mediterranean Seismological Centre 6 September 2021 25 January 2016GCMT Global CMT Catalog Search https://www.globalcmt.org/cgi-bin/globalcmt-cgi-bin/CMT5/form?itype=ymd&yr=2016&mo=1&day=24&oyr=2016&omo=1&oday=26&jyr=1976&jday=1&ojyr=1976&ojday=1&otype=nd&nday=5&lmw=&umw=10&lms=0&ums=10&lmb=0&umb=10&llat=-90&ulat=90&llon=-180&ulon=180&lhd=0&uhd=1000<s=-9999&uts=9999&lpe1=0&upe1=90&lpe2=0&upe2=90&list=0 globalcmt.org Global Centroid Moment Tensor 6 September 2021 Assigned a maximum Modified Mercalli scale intensity of VI (Strong),U.S. Geological Survey M 6.3 – 49 km NNE of Al Hoceïma, Morocco https://earthquake.usgs.gov/earthquakes/eventpage/us10004gy9/executive USGS–ANSS 6 September 2021 25 January 2016 the earthquake caused one fatality, injuries to at least 30 persons, and moderate damage in Morocco and Spain.
Background
The Strait of Gibraltar sits atop a convergent boundary where the Nubian plate, a fragment of the African plate, is colliding with the Iberian plate (part of the Eurasian plate) at a rate of 5 mm/yr. The northwest–southeast convergence between the two plates results in the occurrence of active shallow faulting offshore and onshore. The Trans-Alboran Shear Zone, a seismic zone measuring 500-km-long by 80-km-wide accommodates, the interaction between the two plates. Seismic activity associated with these shallow faults is characterized by their small to moderately size in magnitudes with thrust, strike-slip or normal focal mechanisms.Eulàlia Gràcia Ingo Grevemeyer Rafael Bartolomé Hector Perea Sara Martínez-Loriente Laura Gómez de la Peña Antonio Villaseñor Yann Klinger Claudio Lo Iacono Susana Diez Alcinoe Calahorrano Miquel Camafort Sergio Costa Elia d’Acremont Alain Rabaute César R. Ranero Earthquake crisis unveils the growth of an incipient continental fault system Nature Communications 2 September 2019 10 3482 3482 10.1038/s41467-019-11064-5 free 31477689 6718684 2019NatCo..10.3482G Historical earthquakes associated with the seismogenic zone have been locally devastating, causing large loss of life. The most damaging earthquake in recent history occurred on 24 February 2004 when a w 6.4 quake struck Al Hoceïma, killing at least 628 people. Major events also occurred in 1804, 1910, and 1994. The deadly 1522 Almería earthquake in southern Spain is associated with shallow faulting within this seismic zone.Tectonics of the Alboran Sea https://www.ign.es/web/resources/sismologia/tproximos/sismotectonica/pag_sismotectonicas/alboran_en.html ign.es Instituto Geográfico Nacional 6 September 2021 16 February 2023 https://web.archive.org/web/20230216150307/https://www.ign.es/web/resources/sismologia/tproximos/sismotectonica/pag_sismotectonicas/alboran_en.html dead
Besides the presence of shallow seismicity, intermediate to deep-focus earthquakes have occurred in the surrounding area as well. The largest deep-focus quake was an w 7.8 which struck the Province of Málaga in Andalusia, Spain at a great depth of 626.2 km on.U.S. Geological Survey M 7.8 – 4 km W of Dúrcal, Spain https://earthquake.usgs.gov/earthquakes/eventpage/iscgem890481/executive USGS–ANSS 6 September 2021 Little is known about the origins of deep-focus earthquakes beneath the Alboran Sea, with theories suggesting an oceanic lithosphere is subducting to the east along the Gibraltar Arc at a near-vertical dip at depth, or some complex slab delamination processes.
Earthquake
The w 6.3–6.4 mainshock resulted from shallow left-lateral strike-slip faulting along the 100-km-long Al-Idrissi Fault.Rafael Espino Terremotos: una falla activa en el Mar de Alborán no para de crecer https://www.diariodealmeria.es/almeria/terremotos-almeria-falla_0_1427857636.html 6 September 2021 Diario de Almeria 14 January 2020 Almería, Spain The mainshock ruptured for a length of approximately 21 km on in a northeast direction at a velocity of 3.0 km/s.Daniel Stich Rosa Martín José Morales José Ángel López-Comino Flor de Lis Mancilla Slip Partitioning in the 2016 Alboran Sea Earthquake Sequence (Western Mediterranean) Frontiers in Earth Science 2020 8 587356 411 10.3389/feart.2020.587356 2020FrEaS...8..411S 10481/64062 free free A maximum fault displacement of 0.6 meters was estimated near the hypocenter of the quake on the fault.
Foreshock and aftershocks
Four days prior (21 January) to the mainshock, an wr 5.1 earthquake struck with an epicenter southeast of the mainshock at a depth of 10 km on. The foreshock caused no damage but was felt III (Weak) at its maximum in Málaga, Spain. It was also felt in Nador and Tangier, Morocco.U.S. Geological Survey M 5.1 – 48 km NNE of Al Hoceïma, Morocco https://earthquake.usgs.gov/earthquakes/eventpage/us10004g3i/ USGS–ANSS 6 September 2021 This foreshock was the first recorded in the 2016 Alboran earthquake sequence.
Twenty-four aftershocks measuring 4.0 or greater were recorded by the U.S. Geological Survey. Four of the aftershocks had magnitudes greater than 5.0, with the largest measuring a 5.3 just over ten minutes after the mainshock.U.S. Geological Survey M 5.3 – 51 km NNE of Al Hoceïma, Morocco https://earthquake.usgs.gov/earthquakes/eventpage/us10004gyj/executive USGS-ANSS 6 September 2021 The aftershocks were strong enough to be felt in Morocco and Spain. The focal mechanisms for the largest aftershocks featured shallow reverse faulting. A total of more than 2350 aftershocks were recorded from 25 January to 13 May the same year, 197 of them greater or equal to magnitude 3.0.
Impact
In Al Hoceima, a 12-year-old boy suffered a heart attack caused by panic during the earthquake, and died after arriving at a hospital.Simon Hunter Earthquake measuring 6.3 rocks Andalusia and Melilla https://english.elpais.com/elpais/2016/01/25/inenglish/1453705242_838911.html 6 September 2021 El País Madrid, Spain 26 January 2016 A woman was injured after jumping from a two-storey building for fears that it would collapse.Un niño de 12 años muere al sufrir un infarto durante el terremoto https://www.elmundo.es/sociedad/2016/01/25/56a60e5346163f301d8b45d2.html 6 September 2021 El Mundo 26 January 2016 Spanish
In Melilla, a Spanish city in North Africa, emergency services received over 200 calls from residents reporting damage to homes and buildings. The power supply was disrupted in some areas in the city. At least 26 people were treated for their injuries that consisted of mainly cuts and bruises. According to the Mayor-President of Melilla, Juan José Imbroda, schools in the city were closed for damage inspections.Spain: Magnitude 6.2 earthquake felt in African enclave https://apnews.com/article/6c30f0a4393b49f690ebbe69e9e66a9c 6 September 2021 Associated Press News 25 January 2021 Madrid, Spain Damage including concrete blocks falling from an apartment building was reported in the city. The homes of 160 residents sustained serious damage but they were occupied shortly after the quake. The total damage in the city is estimated at 12 million euros.Melilla cierra muchas heridas pero sin olvidar el terremoto un año después https://www.efe.com/efe/espana/sociedad/melilla-cierra-muchas-heridas-pero-sin-olvidar-el-terremoto-un-ano-despues/10004-3157798 6 September 2021 EFE 24 January 2017
See also
List of earthquakes in 2016
List of earthquakes in Morocco
List of earthquakes in Spain
References
External links
608278395
Category:2016 earthquakes
Category:Earthquakes in Morocco
Category:Earthquakes in Spain
Category:2016 in Morocco
Category:2016 in Spain
Category:January 2016 in Europe
Category:History of Melilla
Category:2016 disasters in Spain
Category:2010s disasters in Morocco
Category:2016 disasters in Africa