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| Titel |
Estimation of three-dimensional crustal movements in the 2011 Tohoku-Oki, Japan, earthquake from TerraSAR-X intensity images |
| VerfasserIn |
W. Liu, F. Yamazaki, M. Matsuoka, T. Nonaka, T. Sasagawa |
| 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 Sciences ; 15, no. 3 ; Nr. 15, no. 3 (2015-03-27), S.637-645 |
| Datensatznummer |
250119377
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| Publikation (Nr.) |
 copernicus.org/nhess-15-637-2015.pdf |
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| Zusammenfassung |
| The Tohoku-Oki earthquake on 11 March 2011 caused significant widespread
crustal movements. In a previous study, we proposed a method for capturing
two-dimensional (2-D) surface displacements from a pair of pre- and
post-event TerraSAR-X (TSX) intensity images. However, it is impossible to
detect three-dimensional (3-D) displacements from one pair of TSX images. In
this study, three pairs of pre- and post-event TSX images taken on different
paths were used to estimate 3-D crustal movements. The relationship between
the actual 3-D displacements and the converted 2-D movements in the synthetic-aperture radar (SAR) images
was derived based on the observation model of a SAR sensor. The 3-D movements
were then calculated from three sets of detected 2-D movements that occurred
within a short time period. Compared with GPS observations, the proposed
method was found to be capable of detecting the 3-D crustal movements with
sub-pixel accuracy. |
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