Ground motion directionality inferred from a survey of minaret damage during the 1999 Kocaeli and Düzce, Turkey earthquakes

Masato Motosaka, Adem Somer

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Directionality of ground motions has been discussed in near-source ground motion study. This is interesting from the point of structural response. Dominance of the fault normal (FN) component has been reported in relation to fault rupture direction based on the observation records obtained in the source area (e.g., Somerville et al., 1996). The authors performed the damage survey of the two Turkey earthquakes in 1999, the Kocaeli and the Düzce earthquake, and realized that minaret is a good target to investigate the ground motion directionality, because a minaret is a simple cantilever structure without structural directionality. This paper describes the ground motion directionality based on the survey of minaret damages during the two earthquakes in Turkey. From the damage survey, it is found that the fault normal direction was dominant with a certain distance from the fault, say, less than 1 km. While, at the region with shorter distances, the damage direction was not fault normal but about 40° from the fault strike. Discussion is addressed for the specific damage direction inferred from the minaret damage near the fault.

    Original languageEnglish
    Pages (from-to)419-430
    Number of pages12
    JournalJournal of Seismology
    Volume6
    Issue number3
    DOIs
    Publication statusPublished - 2002 Jul 1

    Keywords

    • 1999 Düzce earthquake
    • 1999 Kocaeli earthquake
    • Building damage
    • Damage survey
    • Ground motion directionality
    • Minaret
    • Slip velocity

    ASJC Scopus subject areas

    • Geophysics
    • Geochemistry and Petrology

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