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

Takeshi Nakamura, Sadaomi Suzuki, Hossein Sadeghi, Seyed Mahmoud Fatemi Aghda, Takeshi Matsushima, Yoshihiro Ito, Sayyed Keivan Hosseini, Arash Jafar Gandomi, Mehdi Maleki

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We investigate the hypocenter distribution of aftershocks of the December 26, 2003 Bam earthquake Mw 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.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalGeophysical Research Letters
Volume32
Issue number9
DOIs
Publication statusPublished - May 16 2005

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Bam earthquake 2003
Iran
aftershock
earthquakes
bricks
mud
circuit diagrams
asperity
damage
propagation
distribution
rupture
earthquake
city

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

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. / Nakamura, Takeshi; Suzuki, Sadaomi; Sadeghi, Hossein; Fatemi Aghda, Seyed Mahmoud; Matsushima, Takeshi; Ito, Yoshihiro; Hosseini, Sayyed Keivan; Gandomi, Arash Jafar; Maleki, Mehdi.

In: Geophysical Research Letters, Vol. 32, No. 9, 16.05.2005, p. 1-5.

Research output: Contribution to journalArticle

Nakamura, Takeshi ; Suzuki, Sadaomi ; Sadeghi, Hossein ; Fatemi Aghda, Seyed Mahmoud ; Matsushima, Takeshi ; Ito, Yoshihiro ; Hosseini, Sayyed Keivan ; Gandomi, Arash Jafar ; Maleki, Mehdi. / 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. In: Geophysical Research Letters. 2005 ; Vol. 32, No. 9. pp. 1-5.
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AU - Sadeghi, Hossein

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AU - Matsushima, Takeshi

AU - Ito, Yoshihiro

AU - Hosseini, Sayyed Keivan

AU - Gandomi, Arash Jafar

AU - Maleki, Mehdi

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