Seven years of postseismic deformation following the 2003 Mw = 6.8 Zemmouri earthquake (Algeria) from InSAR time series

Handle URI:
http://hdl.handle.net/10754/552103
Title:
Seven years of postseismic deformation following the 2003 Mw = 6.8 Zemmouri earthquake (Algeria) from InSAR time series
Authors:
Cetin, Esra; Meghraoui, Mustapha; Cakir, Ziyadin; Akoglu, Ahmet M.; Mimouni, Omar; Chebbah, Mouloud
Abstract:
We study the postseismic surface deformation of the Mw 6.8, 2003 Zemmouri earthquake (northern Algeria) using the Multi-Temporal Small Baseline InSAR technique. InSAR time series obtained from 31 Envisat ASAR images from 2003 to 2010 reveal sub-cm coastline ground movements between Cap Matifou and Dellys. Two regions display subsidence at a maximum rate of 2 mm/yr in Cap Djenet and 3.5 mm/yr in Boumerdes. These regions correlate well with areas of maximum coseismic uplifts, and their association with two rupture segments. Inverse modeling suggest that subsidence in the areas of high coseismic uplift can be explained by afterslip on shallow sections (<5 km) of the fault above the areas of coseismic slip, in agreement with previous GPS observations. The earthquake impact on soft sediments and the ground water table southwest of the earthquake area, characterizes ground deformation of non-tectonic origin. The cumulative postseismic moment due to 7 years afterslip is equivalent to an Mw 6.3 earthquake. Therefore, the postseismic deformation and stress buildup has significant implications on the earthquake cycle models and recurrence intervals of large earthquakes in the Algiers area.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Seven years of postseismic deformation following the 2003 Mw = 6.8 Zemmouri earthquake (Algeria) from InSAR time series 2012, 39 (10):n/a Geophysical Research Letters
Publisher:
Wiley-Blackwell
Journal:
Geophysical Research Letters
Issue Date:
28-May-2012
DOI:
10.1029/2012GL051344
Type:
Article
ISSN:
00948276
Additional Links:
http://doi.wiley.com/10.1029/2012GL051344
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorCetin, Esraen
dc.contributor.authorMeghraoui, Mustaphaen
dc.contributor.authorCakir, Ziyadinen
dc.contributor.authorAkoglu, Ahmet M.en
dc.contributor.authorMimouni, Omaren
dc.contributor.authorChebbah, Moulouden
dc.date.accessioned2015-05-03T14:06:37Zen
dc.date.available2015-05-03T14:06:37Zen
dc.date.issued2012-05-28en
dc.identifier.citationSeven years of postseismic deformation following the 2003 Mw = 6.8 Zemmouri earthquake (Algeria) from InSAR time series 2012, 39 (10):n/a Geophysical Research Lettersen
dc.identifier.issn00948276en
dc.identifier.doi10.1029/2012GL051344en
dc.identifier.urihttp://hdl.handle.net/10754/552103en
dc.description.abstractWe study the postseismic surface deformation of the Mw 6.8, 2003 Zemmouri earthquake (northern Algeria) using the Multi-Temporal Small Baseline InSAR technique. InSAR time series obtained from 31 Envisat ASAR images from 2003 to 2010 reveal sub-cm coastline ground movements between Cap Matifou and Dellys. Two regions display subsidence at a maximum rate of 2 mm/yr in Cap Djenet and 3.5 mm/yr in Boumerdes. These regions correlate well with areas of maximum coseismic uplifts, and their association with two rupture segments. Inverse modeling suggest that subsidence in the areas of high coseismic uplift can be explained by afterslip on shallow sections (<5 km) of the fault above the areas of coseismic slip, in agreement with previous GPS observations. The earthquake impact on soft sediments and the ground water table southwest of the earthquake area, characterizes ground deformation of non-tectonic origin. The cumulative postseismic moment due to 7 years afterslip is equivalent to an Mw 6.3 earthquake. Therefore, the postseismic deformation and stress buildup has significant implications on the earthquake cycle models and recurrence intervals of large earthquakes in the Algiers area.en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://doi.wiley.com/10.1029/2012GL051344en
dc.rightsArchived with thanks to Geophysical Research Lettersen
dc.titleSeven years of postseismic deformation following the 2003 Mw = 6.8 Zemmouri earthquake (Algeria) from InSAR time seriesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalGeophysical Research Lettersen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Geology, Istanbul Technical University, Istanbul, Turkeyen
dc.contributor.institutionInstitut de Physique du Globe, CNRS-UMR 7516, Strasbourg, Franceen
dc.contributor.institutionFSTGAT, Université des Sciences et Techniques Houari Boumediene, Algiers, Algeriaen
dc.contributor.institutionAgence National des Ressources Hydrauliques, Blida, Algeria.en
kaust.authorAkoglu, Ahmeten
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