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Rupture process of the 2007 Niigata-ken Chuetsu-oki earthquake by non-linear joint inversion of strong motion and GPS data
Author(s)
Language
English
Obiettivo Specifico
3.1. Fisica dei terremoti
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/35(2008)
Publisher
American Geophysical Union
Pages (printed)
L16306
Issued date
August 23, 2008
Alternative Location
Keywords
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.
References
Aoi, S., H. Sekiguchi, N. Morikawa, T. Ozawa, T. Kunugi, M. Shirasaka (2007), Source Process of the 2007 Niigata-ken Chuetsu-oki Earthquake derived from Near-fault Strong Motion Data, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract S54A-04.
Cirella, A., A. Piatanesi, P. Spudich, M. Cocco and E. Tinti (2007), Using a Global Search Inversion to Constrain Earthquake Kinematic Rupture History and to Assess Model Uncertainty, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract S53C-03.
Irikura, K., T. Kagawa, K. Miyakoshi, S. Kurahashi (2007), Rupture process and strong ground motions of the 2007 Niigataken Chuetsu-Oki earthquake –Directivity pulses striking the Kashiwazaki-Kariwa Nuclear Power Plant-, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract S31B-0441.
Kato, A., E. Kurashimo, N. Hirata, S. Sakai, T. Iwasaki and T. Kanazawa (2005), Imaging the source region of the 2004 mid-Niigata prefecture earthquake and the evolution of a seismogenic thrust-related fold, Geophys. Res. Lett., 32, L07307, doi:10.1029/2005GL022366.
Koketsu, K., H. Miyake, K. Hikima (2007), Source Inversion for the 2007 Chuetsu-oki, Japan, Earthquake: A Case of Difficulty Determining the Source Fault Plane, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract S54A-05.
Mikumo, T., K. B. Olsen, E. Fukuyama, and Y. Yagi (2002). Stress-breakdown time and slip-weakening distance inferred from slip-velocity functions on earthquake faults, Bull. Seism. Soc. Am., 93(1), 264–282.
Nakajima, J. and A. Hasegawa (2007), Deep crustal structure along the Niigata-Kobe Tectonic Zone, Japan: Its origin and segmentation, Earth Planets Space, 59, e5-e8.
Piatanesi, A., A. Cirella, P. Spudich, and M. Cocco (2007), A global search inversion for earthquake kinematic rupture history: Application to the 2000 western Tottori, Japan earthquake, J. Geophys. Res., 112, B07314.
Spudich, P. and L. Xu (2003), Software for calculating earthquake ground motions from finite faults in vertically varying media, in International Handbook of Earthquake and Engineering Seismology, Academic Press.
Sugiyama, Y (2007), 16 July 2007 Niigata-ken Chuetsu-oki earthquake; its characteristics, tectonic background and significance for active fault evaluation, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract T31G-01.
Tinti, E., E. Fukuyama, A. Piatanesi and M. Cocco (2005), A kinematic source time function compatible with earthquake dynamics, Bull. Seismol. Soc. Am., 95(4), 1211-1223, doi:10.1785/0120040177.
Toda, S. (2007), 2007 Mw=6.6 Niigata Chuetsu-Oki earthquake ruptured on a fault strongly unclamped by the 2004 Mw=6.6 Niigata Chuetsu shock, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract S13B-1301.
Wessel, P. and W.H.F. Smith (1998), New, improved version of the Generic Mapping Tools released, EOS Trans. AGU, 79, 579.
Yukutake, Y., T. Takeda, and K.Obara (2007), Spatial distribution of aftershocks in the region of Niigata Tyuetsu-oki Earthquake in 2007, by waveform correlation analysis, Seismol. Soc. Jpn. Programme. Abstr. Fall Meeting, PI-063, (in Japanese).
Cirella, A., A. Piatanesi, P. Spudich, M. Cocco and E. Tinti (2007), Using a Global Search Inversion to Constrain Earthquake Kinematic Rupture History and to Assess Model Uncertainty, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract S53C-03.
Irikura, K., T. Kagawa, K. Miyakoshi, S. Kurahashi (2007), Rupture process and strong ground motions of the 2007 Niigataken Chuetsu-Oki earthquake –Directivity pulses striking the Kashiwazaki-Kariwa Nuclear Power Plant-, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract S31B-0441.
Kato, A., E. Kurashimo, N. Hirata, S. Sakai, T. Iwasaki and T. Kanazawa (2005), Imaging the source region of the 2004 mid-Niigata prefecture earthquake and the evolution of a seismogenic thrust-related fold, Geophys. Res. Lett., 32, L07307, doi:10.1029/2005GL022366.
Koketsu, K., H. Miyake, K. Hikima (2007), Source Inversion for the 2007 Chuetsu-oki, Japan, Earthquake: A Case of Difficulty Determining the Source Fault Plane, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract S54A-05.
Mikumo, T., K. B. Olsen, E. Fukuyama, and Y. Yagi (2002). Stress-breakdown time and slip-weakening distance inferred from slip-velocity functions on earthquake faults, Bull. Seism. Soc. Am., 93(1), 264–282.
Nakajima, J. and A. Hasegawa (2007), Deep crustal structure along the Niigata-Kobe Tectonic Zone, Japan: Its origin and segmentation, Earth Planets Space, 59, e5-e8.
Piatanesi, A., A. Cirella, P. Spudich, and M. Cocco (2007), A global search inversion for earthquake kinematic rupture history: Application to the 2000 western Tottori, Japan earthquake, J. Geophys. Res., 112, B07314.
Spudich, P. and L. Xu (2003), Software for calculating earthquake ground motions from finite faults in vertically varying media, in International Handbook of Earthquake and Engineering Seismology, Academic Press.
Sugiyama, Y (2007), 16 July 2007 Niigata-ken Chuetsu-oki earthquake; its characteristics, tectonic background and significance for active fault evaluation, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract T31G-01.
Tinti, E., E. Fukuyama, A. Piatanesi and M. Cocco (2005), A kinematic source time function compatible with earthquake dynamics, Bull. Seismol. Soc. Am., 95(4), 1211-1223, doi:10.1785/0120040177.
Toda, S. (2007), 2007 Mw=6.6 Niigata Chuetsu-Oki earthquake ruptured on a fault strongly unclamped by the 2004 Mw=6.6 Niigata Chuetsu shock, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract S13B-1301.
Wessel, P. and W.H.F. Smith (1998), New, improved version of the Generic Mapping Tools released, EOS Trans. AGU, 79, 579.
Yukutake, Y., T. Takeda, and K.Obara (2007), Spatial distribution of aftershocks in the region of Niigata Tyuetsu-oki Earthquake in 2007, by waveform correlation analysis, Seismol. Soc. Jpn. Programme. Abstr. Fall Meeting, PI-063, (in Japanese).
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