Can slip heterogeneity be linked to earthquake recurrence?

Hui-Hsuan Chen, Iyin Chen, Ahyi Kim

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    The rupture process of two M4 repeating earthquake sequences in eastern Taiwan with contrasting recurrence behavior is investigated to demonstrate a link between slip heterogeneity and earthquake recurrence. The M3.6–3.8 quasiperiodic repeating earthquakes characterized by 3 years recurrence interval reveal overlapped slip concentrations. Inferred slip distribution for each event illustrates two asperities with peak slip of 47.7 cm and peak stress drop of 151.1 MPa. Under the influence of nearby M6.9 event, the M4.3–4.8 repeating earthquakes separated only by 6–87 min, however, reveal an aperiodic manner. There is a distinct rupture characteristic without overlap in the slip areas, suggesting that shortening of the recurrence interval by the nearby large earthquake may change the slip heterogeneity in a repeatedly ruptured asperity. We conclude that the inherent heterogeneity of stress and strength could influence the distribution of coseismic slip, which is strongly tied to the recurrence behavior.

    Original languageEnglish
    Pages (from-to)6916-6923
    Number of pages8
    JournalGeophysical Research Letters
    Volume43
    Issue number13
    DOIs
    Publication statusPublished - 2016 Jul 16

    Keywords

    • asperity
    • earthquake recurrence
    • empirical Green's function
    • moment rate inversion
    • stress drop

    ASJC Scopus subject areas

    • Geophysics
    • Earth and Planetary Sciences(all)

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