2011
DOI: 10.1111/j.1365-246x.2010.04876.x
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Strain accumulation process around the Atotsugawa fault system in the Niigata-Kobe Tectonic Zone, central Japan

Abstract: S U M M A R YIn order to investigate the strain accumulation process around the Niigata-Kobe Tectonic Zone in central Japan, we estimate a precise GPS velocity field around a representative fault area, the Atotsugawa fault system. The velocity profiles obtained from two dense GPS arrays crossing the Atotsugawa fault demonstrate the existence of a laterally heterogeneous deformation pattern along the fault strike. The West Array suggests the possibility of surface fault creep, which disagrees with inferences gl… Show more

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Cited by 28 publications
(25 citation statements)
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“…1) and around this fault system since 1997 by a university consortium comprised of Nagoya, Kyoto, Hokkaido, and Toyama universities. The continuous GNSS surveys in this network clarified the dextral motion of the Atotsugawa fault system at depth (Hirahara et al 2003;Ohzono et al 2011), which is consistent with WNW-ESE compressional stress field (e.g., Katsumata et al 2010;Takada et al 2016). In this study, we focus on the velocity field of this area before the 2011 Tohoku-Oki earthquake (Mw 9.0), with the goal of characterizing a more detailed interseismic velocity field in and around the Atotsugawa fault system by combining L-band InSAR and GNSS data.…”
Section: Introductionsupporting
confidence: 50%
See 2 more Smart Citations
“…1) and around this fault system since 1997 by a university consortium comprised of Nagoya, Kyoto, Hokkaido, and Toyama universities. The continuous GNSS surveys in this network clarified the dextral motion of the Atotsugawa fault system at depth (Hirahara et al 2003;Ohzono et al 2011), which is consistent with WNW-ESE compressional stress field (e.g., Katsumata et al 2010;Takada et al 2016). In this study, we focus on the velocity field of this area before the 2011 Tohoku-Oki earthquake (Mw 9.0), with the goal of characterizing a more detailed interseismic velocity field in and around the Atotsugawa fault system by combining L-band InSAR and GNSS data.…”
Section: Introductionsupporting
confidence: 50%
“…However, we may say that the velocity gradient does not have its maximum across the Atotsugawa fault. This tendency can be seen in figures from previous studies (Hirahara et al 2003;Ohzono et al 2011), although it was not specifically described. In Fig.…”
Section: Input To the Time-series Analysismentioning
confidence: 57%
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“…Iio et al (2002Iio et al ( , 2004 proposed an alternative model whereby deformation in the weak, ductile lower crust facilitates the high strain rates along the NKTZ. However, geodetic observations with dense GNSS arrays have revealed regional variations in the width of the NKTZ, ranging from tens kilometers to the east of the Itoigawa-Shizuoka Tectonic Line (ISTL) to 50-100 km to the west of the ISTL (e.g., Sagiya et al 2004;Ohzono et al 2009;Nishimura et al 2012). These observations suggest that underlying physical mechanisms generating surface deformation are different between the west and east of the ISTL.…”
Section: Introductionmentioning
confidence: 99%
“…Co-seismic rupture area of trench-type large earthquakes in Hyuga-nada (Yagi et al, 1998;Yagi et al, 1999 , Fabbri and Fournier, 1999;Fabbri, 2000;Fournier et al, 2001Fournier et al, V 1990Fournier et al, , , 1992, 1992;, 1996, , Toda et al, 2002Di Carli et al, 2008, Yoshida et al, 2012Imanishi et al, 2012, , , , Obara, 2002Ozawa et al, 2011;Ohzono et al, 2011;Suito et al, 2011;, 2012 , Fabbri andFournier, 1999;Fabbri, 2000;Fournier et al, 2001;Yamaji, 2000;Yamaji et …”
mentioning
confidence: 99%