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Seismic Sources

Objectives

  • This WP aims at advancing earthquake source imaging.
  • The improved source-rupture models will in turn be critical input to studies of the mechanical processes of earthquakes and to developments of new source-characterization for shaking scenario simulations for ground prediction and seismic hazard.
  • Specific research topics include

    • the quantitative assessment of uncertainties and the development of fully nonlinear inversion schemes using the probabilistic approach;

    • applying space and time adaptive inversion parameterizations;

    • development of strategies to include the high-frequency part of the wave field into source imaging;

    • direct inversion of dynamic rupture parameters;

    • and the design of optimal experimental configurations (including borehole geometries) for source imaging by resolution analysis.

  • These studies shall be complemented by “blind source imaging” exercises that will include researchers outside QUEST.
  • This WP will also address the issue of high-resolution source location in the context of hydrofracturing (e.g. geothermal reservoirs, enhanced oil-recovery).

Description of work

(leader in bold)

  • T7.1 Development of efficient modelling tools for earthquakes along complex faults in realistic rheologies (ETH Zurich, UOXF.DG, IPG, LMU, CUB, CUP, NUID UCD)
  • T7.2 Inference of fault rheology from ground motions (ING, CUB, ETH Zurich)
  • T7.3 Extension of benchmark library for source modelling and inversion problems (ETH Zurich, CUB, CUP, LMU)
  • T7.4 Inversion of rupture from broadband records (UOXF.DG, IPG, ING).

 

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