A Unified Catalog of Main Earthquakes for Northern Algeria from A.D. 856 to 2008

Hamdache, Mohamed; Peláez, José A.; Talbi, Abdelhak; Casado, Carlos López

doi:10.1785/gssrl.81.5.732

Cited by 59 publications

(63 citation statements)

References 43 publications

(34 reference statements)

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“…Although a paleoseismological approach based on a single core is not possible, the position of this core less than 5 km away from the cable breaks suggests that the sampled turbidites may be seismically triggered. It is also worth to note the following: (1) the mean recurrence interval of turbidites in core PSM-KS23 is of the same order as the mean 720-yr interval proposed by Meghraoui et al (1988) from their paleoseismic investigation led on the El Asnam fault onshore, ∼250 km W-SW from the Boumerdès earthquake area, and (2) large events in the eastern Algiers area are very rare over the last 1200 yr according to historical records (Hamdache et al, 2010), supporting a possible causative link between a given earthquake shaking threshold and multi-source turbidity currents triggered at this place.…”

Section: Potential Reconstructions Of Paleoseismology With Distal Turmentioning

confidence: 57%

“…The Algerian continental margin is one of the most seismically active areas in the western Mediterranean, having experienced several moderate to strong earthquakes during the last centuries in the coastal zone (Benouar, 1993;Hamdache et al, 2010). The catalogue 856-2008 AD reveals that about 22 earthquakes of magnitude 6 and more have shaken the coastal strip of Algeria (over ∼100 km wide).…”

Section: Tectonic Setting and Seismicitymentioning

confidence: 99%

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Searching for the seafloor signature of the 21 May 2003 Boumerdès earthquake offshore central Algeria

Cattaneo

Babonneau

Ratzov

et al. 2012

Nat. Hazards Earth Syst. Sci.

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Abstract. Shaking by moderate to large earthquakes in the Mediterranean Sea has proved in the past to potentially trigger catastrophic sediment collapse and flow. On 21 May 2003, a magnitude 6.8 earthquake located near Boumerdès (central Algerian coast) triggered large turbidity currents responsible for 29 submarine cable breaks at the foot of the continental slope over ∼150 km from west to east. Seafloor bathymetry and backscatter imagery show the potential imprints of the 2003 event and of previous events. Large slope scarps resulting from active deformation may locally enhance sediment instabilities, although faults are not directly visible at the seafloor. Erosion is evident at the foot of the margin and along the paths of the numerous canyons and valleys. Cable breaks are located at the outlets of submarine valleys and in areas of turbiditic levee overspilling and demonstrate the multi-source and multi-path character of the 2003 turbiditic event. Rough estimates of turbidity flow velocity are not straightforward because of the multiple breaks along the same cable, but seem compatible with those measured in other submarine cable break studies elsewhere.While the signature of the turbidity currents is mostly erosional on the continental slope, turbidite beds alternating with hemipelagites accumulate in the distal reaches of sediment dispersal systems. In perspective, more chronological work on distal turbidite successions offshore Algeria offers promising perspectives for paleoseismology reconstructions based on turbidite dating, if synchronous turbidites along independent sedimentary dispersal systems are found to support triggering by major earthquakes. Preliminary results on sediment core PSM-KS23 off Boumerdès typically show a 800-yr interval between turbidites during the Holocene, in accordance with the estimated mean seismic cycle on land, even if at this stage it is not yet possible to prove the earthquake origin of all the turbidites.

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Section: Potential Reconstructions Of Paleoseismology With Distal Turmentioning

confidence: 57%

Section: Tectonic Setting and Seismicitymentioning

confidence: 99%

Searching for the seafloor signature of the 21 May 2003 Boumerdès earthquake offshore central Algeria

Cattaneo

Babonneau

Ratzov

et al. 2012

Nat. Hazards Earth Syst. Sci.

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“…Their works were later updated by other new catalogs of Mokrane et al, (1994);Benouar (1994); Harbi et al, (2007); , 2007 and Hamdache et al (2010).…”

Section: Historical Seismicitymentioning

confidence: 99%

The large Algerian earthquakes (267 A.D.-2017)

2017

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“…) The seismicity of northern Algeria, and specifically the region of Algiers, has only recently become the object of detailed seismological study, so that empirical and instrumental data form a relatively short catalogue. A list of historic and documented events is compiled in Table 3, edited from Hamdache et al (2010) to include only events with destructive consequences in Algiers. As it can be seen from this list, at least one destructive event per century has occurred in the Algiers region since the devastating event of 1365.…”

Section: Seismic Hazardmentioning

confidence: 99%

A procedure for the identification of the seismic vulnerability at territorial scale. Application to the Casbah of Algiers

Novelli

D’Ayala

Makhloufi

et al. 2014

Bull Earthquake Eng

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One of the objectives of the PERPETUATE EU-FP7 project was to determine a sound approach to the quantification of the seismic vulnerability of historic centres at territorial scale. The procedure presented herein provides a ten steps guideline from how to select building samples in the area of study, to how to compute the buildings' seismic performance and finally how to evaluate rehabilitation decisions to reduce the seismic fragility of the studied typologies over an entire district or city. The procedure is illustrated in this paper by way of application to The Casbah of Algiers, a world heritage site composed of building clusters from the Ottoman to the French period. Pre-existing seismic damage, decay due to lack of maintenance and environmental factor and a urban irregular and complex lay-out make this application particularly challenging. (2015) 13:177-202 Evaluation), a mechanical approach based on limit state analysis and kinematics, which allows computing collapse load factor, deriving capacity curves and determining fragility functions. As the approach identifies also the collapse mechanisms, it provides a base for choosing and evaluating the effects of strengthening interventions, which are rolled out at territorial level to improve the seismic performance of the whole sample. The effectiveness of the present procedure for the identification of the seismic vulnerability at territorial scale is discussed in the conclusions.123 178 Bull Earthquake Eng

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A Unified Catalog of Main Earthquakes for Northern Algeria from A.D. 856 to 2008

Cited by 59 publications

References 43 publications

Searching for the seafloor signature of the 21 May 2003 Boumerdès earthquake offshore central Algeria

Searching for the seafloor signature of the 21 May 2003 Boumerdès earthquake offshore central Algeria

The large Algerian earthquakes (267 A.D.-2017)

A procedure for the identification of the seismic vulnerability at territorial scale. Application to the Casbah of Algiers

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