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http://hdl.handle.net/2122/4655
Authors: | Cirella, A.* Piatanesi, A.* Tinti, E.* Cocco, M.* |
Title: | Rupture process of the 2007 Niigata-ken Chuetsu-oki earthquake by non-linear joint inversion of strong motion and GPS data | Journal: | Geophysical Research Letters | Series/Report no.: | /35(2008) | Publisher: | American Geophysical Union | Issue Date: | 23-Aug-2008 | DOI: | 10.1029/2008GL034756 | URL: | http://www.agu.org/journals/gl/gl0816/2008GL034756/2008GL034756.pdf | Keywords: | rupture process inversion |
Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics | Abstract: | We image the rupture history of the 2007 Niigata-ken Chuestu-oki (Japan) earthquake by a nonlinear joint inversion of strong motion and GPS data, retrieving peak slip velocity, rupture time, rise time and slip direction. The inferred rupture model contains two asperities; a small patch near the nucleation and a larger one located 10÷15 km to the south-west. The maximum slip ranges between 2.0 and 2.5 m and the total seismic moment is 1.6×1019 Nm. The inferred rupture history is characterized by rupture acceleration and directivity effects, which are stable features of the inverted models. These features as well as the source-to-receiver geometry are discussed to interpret the high peak ground motions observed (PGA is 1200 gals) at the Kashiwazaki-Kariwa nuclear power plant (KKNPP), situated on the hanging-wall of the causative fault. Despite the evident source effects, predicted PGV underestimates the observed values at KKNPP by nearly a factor of 10. |
Appears in Collections: | Article published / in press |
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2008GL034756.pdf | published article | 770.2 kB | Adobe PDF | |
Cirella_etal_GRL_revised.pdf | accepted unformatted article | 528.64 kB | Adobe PDF | View/Open |
2008gl034756-readme.txt | supplementary material | 4.55 kB | Text | View/Open |
2008gl034756-fs01.eps | supplementary material | 1.36 MB | Postscript | View/Open |
2008gl034756-fs02.eps | supplementary material | 1.28 MB | Postscript | View/Open |
2008gl034756-fs03.eps | supplementary material | 1.29 MB | Postscript | View/Open |
2008gl034756-fs04.eps | supplementary material | 2.32 MB | Postscript | View/Open |
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