Research ArticleGEOPHYSICS

Seismic potential of weak, near-surface faults revealed at plate tectonic slip rates

See allHide authors and affiliations

Science Advances  22 Nov 2017:
Vol. 3, no. 11, e1701269
DOI: 10.1126/sciadv.1701269
  • Fig. 1 Study areas.

    World map showing the locations of scientific drilling where the samples tested in this study were recovered. Triangles/diamond, subduction thrusts; squares, transform faults; circle, normal fault. See the Supplementary Materials for references pertaining to geologic rates. Map courtesy of the International Ocean Discovery Program JOIDES Resolution Science Operator.

  • Fig. 2 Frictional properties.

    Velocity-dependent friction parameter a-b as a function of the coefficient of friction immediately preceding the velocity change. Data for standards from Ikari et al. (5) and Japan Trench data from Ikari et al. (31, 32). Symbols and colors follow those in Fig. 1.

  • Fig. 3 Experimental SSE characteristics.

    Peak slip velocity as a function of % stress drop for laboratory-generated SSE. Circled data points indicate SSE generated at slip rates higher than 8.5 cm/year (see table S1 for details). Symbols and colors follow those in Figs. 1 and 2. Japan Trench data from Ikari et al. (31).

Supplementary Materials

  • Supplementary material for this article is available at http://advances.sciencemag.org/cgi/content/full/3/11/e1701269/DC1

    fig. S1. Experimental apparatus and examples of experimental data.

    fig. S2. Time series of experimental friction data for a sample from the Cascadia subduction zone (experiment B565) showing details of an experimentally observed SSE.

    table S1. Sample and sample location details.

    table S2. Velocity-dependent friction parameters determined by inverse modeling.

    table S3. Velocity dependence of friction determined by direct measurement.

    table S4. Experimentally measured SSE parameters.

    References (4850)

  • Supplementary Materials

    This PDF file includes:

    • fig. S1. Experimental apparatus and examples of experimental data.
    • fig. S2. Time series of experimental friction data for a sample from the Cascadia subduction zone (experiment B565) showing details of an experimentally observed SSE.
    • Legends for tables S1 to S4
    • References (48–50)

    Download PDF

    Other Supplementary Material for this manuscript includes the following:

    • table S1 (Microsoft Excel format). Sample and sample location details.
    • table S2 (Microsoft Excel format). Velocity-dependent friction parameters determined by inverse modeling.
    • table S3 (Microsoft Excel format). Velocity dependence of friction determined by direct measurement.
    • table S4 (Microsoft Excel format). Experimentally measured SSE parameters.

    Download Tables S1 to S4

    Files in this Data Supplement:

Navigate This Article