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| Titel |
Source of the 6 February 2013 Mw = 8.0 Santa Cruz Islands Tsunami |
| VerfasserIn |
F. Romano, I. Molinari, S. Lorito, A. Piatanesi |
| 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. 6 ; Nr. 15, no. 6 (2015-06-26), S.1371-1379 |
| Datensatznummer |
250119543
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| Publikation (Nr.) |
 copernicus.org/nhess-15-1371-2015.pdf |
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| Zusammenfassung |
| On 6 February 2013 an Mw = 8.0 subduction earthquake occurred close to
Santa Cruz Islands at the transition between the Solomon and the New
Hebrides Trench. The ensuing tsunami caused significant inundation on the
closest Nendo Island. The seismic source was studied with teleseismic
broadband P-wave inversion optimized with tsunami forward modelling at DART
buoys (Lay et al., 2013) and with inversion of teleseismic body and surface
waves (Hayes et al., 2014a). The two studies also use different hypocentres
and different planar fault models and found quite different slip models. In
particular, Hayes et al. (2014a) argued for an aseismic slip patch SE from
the hypocentre. We here develop a 3-D model of the fault surface from
seismicity analysis and retrieve the tsunami source by inverting DART and
tide-gauge data. Our tsunami source model features a main slip patch (peak
value of ~ 11 m) SE of the hypocentre and reaching the
trench. The rake direction is consistent with the progressively more oblique
plate convergence towards the Solomon trench. The tsunami source partially
overlaps the hypothesized aseismic slip area, which then might have slipped coseismically. |
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