On the Development of a Homogenized Earthquake Catalogue for Northern Algeria
Regions with a significant percentage of non-seismically designed buildings and reduced urban planning are particularly vulnerable to natural hazards. In this context, the project ‘Improved Tools for Disaster Risk Mitigation in Algeria’ (ITERATE) aims at seismic risk mitigation in Algeria. Past earthquakes in North Algeria caused extensive damages, e.g. the El Asnam 1980 moment magnitude (Mw) 7.1 and Boumerdes 2003 Mw 6.8 earthquakes. This paper will address a number of proposed developments and considerations made towards a further improvement of the component of seismic hazard. In specific, an updated earthquake catalog (until year 2018) is compiled, and new conversion equations to moment magnitude are introduced. Furthermore, a network-based method for the estimation of the spatial and temporal distribution of the minimum magnitude of completeness is applied. We found relatively large values for Mc, due to the sparse network, and a nonlinear trend between Mw and body wave (mb) or local magnitude (ML), which are the most common scales reported in the region. Lastly, the resulting b-value of the Gutenberg-Richter distribution is sensitive to the declustering method.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.2021999Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 657
 N. Laouami, A. Slimani, Y. Bouhadad, J.L. Chatelain, and A. Nour, “Evidence for fault-related directionality and localized site effects from strong motion recordings of the 2003 Boumerdes (Algeria) earthquake: Consequences on damage distribution and the Algerian seismic code,” Soil dynamics and earthquake engineering, 26(11), pp. 991-1003, Nov. 2006.
 Hamdache, M., Pelaez, J. A., and A.K. Yelles-Chauche, “The Algiers, Algeria Earthquake (Mw 6. 8) of 21 May 2003: Preliminary Report,” Seismological Research Letters, 75(3), 360-367, 2004.
 J. Woessner, J. L. Hardebeck, and E. Haukkson, “What is an instrumental seismicity catalog?” Community Online Resource for Statistical Seismicity Analysis, doi:10.5078/corssa-38784307, Sept. 2010.
 S. Husen, and J. L. Hardebeck, “Earthquake location accuracy,” Community Online Resource for Statistical Seismicity Analysis, DOI: 10.5078/corssa-55815573, 2010.
 Hamdache, M., Peláez, J. A., Talbi, A., and C. L. Casado, “A unified catalog of main earthquakes for Northern Algeria from AD 856 to 2008,” Seismological Research Letters, 81(5), 732-739, 2010.
 A. Harbi, D. Benouar, and H. Benhallou, “Re-appraisal of seismicity and seismotectonics in the north-eastern Algeria Part I: Review of historical seismicity,” Journal of Seismology, 7(1), 115-136, 2003.
 B. Gutenberg, and C.F. Richter, Seismicity of the earth and related phenomena. Princeton (NJ), 1949.
 J. K. Gardner, and L. Knopoff, “Is the sequence of earthquakes in Southern California, with aftershocks removed, Poissonian?” Bulletin of the Seismological Society of America, 64(5), pp. 1363-1367, 1974.
 International Seismological Centre, On-line Bulletin, http://www.isc.ac.uk, Internatl. Seismol. Cent., Thatcham, United Kingdom, 2015.
 H. Kanamori, “Magnitude scale and quantification of earthquakes,” Tectonophysics, 93, pp. 185-199, 1983.
 R. M. W. Musson, “The Effect of Magnitude Uncertainty on Earthquake Activity Rates,” Bulletin of the Seismological Society of America, 102(6), pp. 2771 – 2775, 2012.
 S. Castellaro, and P. Bormann, “Performance of different regression procedures on the magnitude conversion problem,” Bulletin of the Seismological Society of America, 97(4), 1167–1175, Aug. 2007.
 D. Amorese, “Applying a change-point detection method on frequency-magnitude distributions,” Bulletin of the Seismological Society of America, 97(5), 1742-1749, 2007.
 D. Schorlemmer, and J. Woessner, “Probability of detecting an earthquake,” Bulletin of the Seismological Society of America, 98(5), 2103-2117, 2008.
 A. Yelles-Chaouche, T. Allili, A. Alili, W. Messemen, H. Beldjoudi, ... and C.N.N.S. Said, “The new Algerian Digital Seismic Network (ADSN): towards an earthquake early-warning system,” Advances in Geosciences, 36, 31-38, Oct. 2013.
 A. Mignan, M.J. Werner, S. Wiemer, C.-C. Chen, and Y.-M. Wu, “Bayesian estimation of the spatially varying completeness magnitude of earthquake catalogs,” Bulletin of the Seismological Society of America, 101(3), 1371-1385, June 2011.
 R. Uhrhammer, “Characteristics of Northern and Central California Seismicity,” Earthquake Notes, 57(1), 21, 1986.