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Earthquake Source Inversion Validation Workshop | Agenda
WORKSHOP ON LAUNCHING AN EARTHQUAKE SOURCE INVERSION
VALIDATION EXERCISE
Conveners: Martin Mai, Danijel Schorlemmer, and Morgan Page
Earthquake source inversions image the spatio-temporal rupture evolution, and hence
constitute a critical research tool to develop a better understanding of the details of the
earthquake source process. However, finite-source rupture models, developed by
different research teams for the same earthquake, exhibit surprisingly large intra-event
variability. Moreover, a recent, small-scale “source inversion blind test” revealed the
difficulties that several inversion methods had, even for a rather simple test case. Despite
a number of new developments in source-inversion approaches, the reliability,
resolution, and robustness of these inversion strategies has not been rigorously examined
and tested.
This workshop serves as a starting point for launching an Earthquake Source Inversion
Validation Exercise. We invite researchers working in earthquake source inversion (and
inversion theory and application in general), users of source-rupture models (e.g.,
rupture-dynamic and ground-motion-simulation people), and statistical analysts (testingcenter
folks and related programmers). The scope of the workshop is (a) to briefly
summarize current source-inversion methods; (b) to define the long-term strategy for
conducting such a validation exercise; (c) to discuss the logistical and computational
framework needed for this exercise; (d) to setup task groups for the different steps of the
validation (model building; ground-motion synthesis; statistical analysis of submitted
models; computational infrastructure…).
SUNDAY, SEPTEMBER 7, 2008 — Plaza Ballroom CD
08:00 – 08:10 Introduction: Scope of the workshop & review of an initial blind-test (M.
Mai)
08:10 – 08:25 Strategies for uncertainty assessment in source inversions (M. Page)
08:25 – 08:40 Importance of covariance components for finite-source inversions (Y.
Yagi)
08:40 – 08:55 Current status of source inversion methods in Japan (K. Koketsu)
08:55 – 09:10 Inverting for dynamic source parameters (R. Madariaga)
09:10 – 09:25 Experience from the Dynamic Code Validation Project (R. Harris)
09:25 – 09:40 An existing testing center: CSEP (D. Schorlemmer)
09:40 – 10:00 Break
10:00 – 12:00 OPEN DISCUSSION: Planning the source-inversion validation exercise
10:00 – 10:40 DISCUSSION 1: Science issues / General questions
• Source inversion: an under-determined problem
• How to best quantify waveform fits?
• How to optimally weight different data sets used in the inversion?
• Effects of source-receiver constellation?
• Effects of different stabilizing/smoothing constraints?
2008 SCEC Annual Meeting | 5