JpGU-AGU Joint Meeting 2017

Presentation information

[EJ] Poster

S (Solid Earth Sciences) » S-SS Seismology

[S-SS12] [EJ] Active faults and paleoseismology

Tue. May 23, 2017 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall HALL7)

convener:Mamoru Koarai(Earth Science course, College of Science, Ibaraki University), Nobuhiko Sugito(Faculty of Humanity and Environment, Hosei University), Nobuhisa Matsuta(Okayama University Graduate School of Education), Ken-ichi Yasue(Japan Atomic Energy Agency)

[SSS12-P05] Postseismic deformation extracted by InSAR, after the 2014 Northern Nagano Prefecture Earthquake

*Masashi Omata1, DAISUKE SANGO1, Yorihide Kohriya1, Noriyuki Shibuya1 (1.PASCO CORPORATION)

Keywords:the 2014 Northern Nagano Prefecture Earthquake, InSAR, Postseismic deformation, Kamishiro fault, surface rupture, ALOS-2

The 2014 Northern Nagano Prefecture Earthquake (Mj 6.7) occurred in November 22, 2014. The crustal deformation emerged in 30km*30km area by the InSAR analysis data after the earthquake (GSI, 2015). And, the surface ruptures occurred 9 kilometers from Shiojima Hakuba village to Higashisano along the Kamishiro fault (Okada et al., 2015). The relation between the appearance position of surface ruptures and the discontinuities of interference phase on the InSAR imagery was studied (Nakano, 2015).
We created InSAR phase image from ALOS-2 data after the 2014 Northern Nagano Prefecture Earthquake. The data is pair of 28 November 2014 and 26 June 2015. As a result of the analysis, the east side of surface rupture moved to the west or went to up. The amount of deformation is 3-4cm in the direction approaching a satellite.