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| Titel |
Source modeling and inversion with near real-time GPS: a GITEWS perspective for Indonesia |
| VerfasserIn |
A. Y. Babeyko, A. Hoechner, S. V. Sobolev |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 10, no. 7 ; Nr. 10, no. 7 (2010-07-26), S.1617-1627 |
| Datensatznummer |
250008317
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| Publikation (Nr.) |
 copernicus.org/nhess-10-1617-2010.pdf |
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| Zusammenfassung |
| 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. |
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