 |
| Titel |
High resolution tsunami inversion for 2010 Chile earthquake |
| VerfasserIn |
T.-R. Wu, T.-C. Ho |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 12 ; Nr. 11, no. 12 (2011-12-12), S.3251-3261 |
| Datensatznummer |
250009830
|
| Publikation (Nr.) |
 copernicus.org/nhess-11-3251-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| We investigate the feasibility of inverting high-resolution vertical
seafloor displacement from tsunami waveforms. An inversion method named
"SUTIM" (small unit tsunami inversion method) is developed to meet this
goal. In addition to utilizing the conventional least-square inversion, this
paper also enhances the inversion resolution by Grid-Shifting method. A
smooth constraint is adopted to gain stability. After a series of validation
and performance tests, SUTIM is used to study the 2010 Chile earthquake.
Based upon data quality and azimuthal distribution, we select tsunami
waveforms from 6 GLOSS stations and 1 DART buoy record. In total, 157
sub-faults are utilized for the high-resolution inversion. The resolution
reaches 10 sub-faults per wavelength. The result is compared with the
distribution of the aftershocks and waveforms at each gauge location with
very good agreement. The inversion result shows that the source profile
features a non-uniform distribution of the seafloor displacement. The highly
elevated vertical seafloor is mainly concentrated in two areas: one is
located in the northern part of the epicentre, between 34° S and
36° S; the other is in the southern part, between 37° S and 38° S. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|