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Source modeling and inversion with near real-time GPS: a GITEWS perspective for Indonesia
A. Y. Babeyko, A. Hoechner, and S. V. Sobolev
Deutsches GeoForschungsZentrum GFZ, Section 2.5, Potsdam, Germany
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Abstract. We present the GITEWS approach to source modeling for the tsunami early
warning in Indonesia. Near-field tsunami implies special requirements to
both warning time and details of source characterization. To meet these
requirements, we employ geophysical and geological information to predefine
a maximum number of rupture parameters. We discretize the tsunamigenic Sunda
plate interface into an ordered grid of patches (150×25) and employ the
concept of Green's functions for forward and inverse rupture modeling.
Rupture Generator, a forward modeling tool, additionally employs different scaling laws and
slip shape functions to construct physically reasonable source models using
basic seismic information only (magnitude and epicenter location). GITEWS
runs a library of semi- and fully-synthetic scenarios to be extensively
employed by system testing as well as by warning center personnel teaching
and training. Near real-time GPS observations are a very valuable
complement to the local tsunami warning system. Their inversion provides
quick (within a few minutes on an event) estimation of the earthquake magnitude,
rupture position and, in case of sufficient station coverage, details of
slip distribution.
Full Article (PDF, 13216 KB) Special Issue
Citation: Babeyko, A. Y., Hoechner, A., and Sobolev, S. V.: Source modeling and inversion with near real-time GPS: a GITEWS perspective for Indonesia, Nat. Hazards Earth Syst. Sci., 10, 1617-1627, doi:10.5194/nhess-10-1617-2010, 2010. Bibtex EndNote Reference Manager XML
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