Source fault structure of the 2003 Bam earthquake, southeastern Iran, inferred from the aftershock distribution and its relation to the heavily damaged area: Existence of the Arg‐e‐Bam fault proposed
2005; American Geophysical Union; Volume: 32; Issue: 9 Linguagem: Inglês
10.1029/2005gl022631
ISSN1944-8007
AutoresTakeshi Nakamura, Sadaomi Suzuki, Hossein Sadeghi, Seyed Mahmoud Fatemi Aghda, Takeshi Matsushima, Yoshihiro Ito, Sayyed Keivan Hosseini, Arash Jafar Gandomi, Mehdi Maleki,
Tópico(s)High-pressure geophysics and materials
ResumoWe investigate the hypocenter distribution of aftershocks of the December 26, 2003 Bam earthquake M w 6.5 by using a temporal seismic network. The hypocenters distribute linearly over about 20 km in parallel with a line 3.5 km west of the geological Bam fault and extend from the south of Bam city to the heavily damaged area in the eastern part of the city including the historical mud brick citadel “Arg‐e‐Bam”. Based on the hypocenter distribution, we propose a schematic 3‐D structural model of a new fault that we have named the Arg‐e‐Bam fault. We suggest that the Bam earthquake occurred not in the Bam fault but in the Arg‐e‐Bam fault. Bam city is located just above northern part of the Arg‐e‐Bam fault and also on the rupture propagation direction from the asperity. This may be one of the main reasons why eastern part of Bam city suffered the heaviest damage.
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