Surface effects of the December 26th, 2003 Bam earthquake along the Bam fault in southeastern Iran
| Accession number;05A0561592 |
| Title;Surface effects of the December 26th, 2003 Bam earthquake along the Bam fault in southeastern Iran |
| Author;OKUMURA KOJI(Hiroshima Univ.) KONDO HISAO(National Inst. Advanced Industrial Sci. And Technol.) AZUMA TAKASHI(National Inst. Advanced Industrial Sci. And Technol.) ECHIGO TOMOO(Univ. Tokyo) HESSAMI KHALED(International Inst. Earthquake Engineering And Seismology) |
Journal Title;Bulletin of the Earthquake Research Institute, University of Tokyo
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Journal Code:S0002A
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ISSN:0040-8972
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VOL.79;NO.3/4;PAGE.29-36(2005)
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| Figure&Table&Reference;FIG.8, REF.9 |
| Pub. Country;Japan |
| Language;English |
| Abstract;During the December 26th, 2003 Bam earthquake, continuous ruptures with a consistent right-lateral strike-slip of a few centimeters occurred north of Bam. A 3 km long strand of ruptures coincides exactly with the trace of the geologic Bam fault. These ruptures were possibly caused by the tectonic slip on the source fault of the 2003 earthquake. The Bam scarp south of the Zehedan highway might have grown during the earthquake. The extension of the area around the scarp indicated by the scarp-parallel fissures may represent the coseismic stretch of the surface. South of the Bam scarp, there was no systematic surface effect. The absence of significant tectonic offset at the surface is concordant with the intermediate magnitude of Mw 6.6. Only a small and deep portion of the Bam fault, or another adjacent blind fault plane was ruptured in 2003. The geologic evidence of the over 50 km long Bam fault suggests a large, probably M 7.5 or larger, event in the future, however, there is no historic and geologic data to quantify the risks. (author abst.) |
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