Since the Last Newsletter, Our Region Has Been Devastated Chris Browitt President Foreword to the Special Section on the May 21 St , Algeria Earthquake Alert System and Real Time Seismicity Special Web Page Emsc Actions concerning the Boumerdes-zemmouri Event
نویسنده
چکیده
The Boumerdes-Algiers earthquake of magnitude Mw:6.8 is the second major event which seriously affected Algeria in the last twenty years. This seismic event, located 7 km north of the village of Zemmouri (50 Km east of Algiers) happened in a region characterized previously by a low to moderate seismic activity. With a depth of 10 km, the earthquake killed 2300 persons and caused huge damage in the epicentral area located between Dellys and Algiers. In this region, site effects such as liquefaction, minor landslides, rock falls, surface breaks have been observed. The earthquake was generated by an unknown offshore reverse fault, the Zemmouri fault. This NE-SW oriented fault extents over 50 km along the margin, between Dellys and Corso. Geological investigations revealed in the epicentral area, surface breaks affecting the Quaternary sedimentary cover. These breaks display two main orientations parallel to the coastline: N35° from Corso to Dellys and N120 from Corso to Tamentefoust. Along this coastline, an uplift of the seafloor with a mean value of about 60 cm has been also observed.
منابع مشابه
Damage Detection Based on Object-based Segmentation and Classification from High-resolution Satellite Images for the 2003 Boumerdes, Algeria Earthquake
A strong earthquake of magnitude 6.8 struck the Mediterranean coast of Algeria on 21 May 2003 and the city of Zemmouri in Boumerdes province was most heavily damaged. QuickBird satellite observed the Zemmouri area on 23 May 2003. By image sharpening, buildings, cars and even debris can clearly be identified in a natural colour image. Preliminarily, the present authors performed visual damage in...
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