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Coseismic and Postseismic Deformation of the 2016 Central Tottori Earthquake and its Slip Model
Author(s) -
MenesesGutierrez Angela,
Nishimura Takuya,
Hashimoto Manabu
Publication year - 2019
Publication title -
journal of geophysical research: solid earth
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.983
H-Index - 232
eISSN - 2169-9356
pISSN - 2169-9313
DOI - 10.1029/2018jb016105
Subject(s) - geology , seismology , aftershock , hypocenter , geodesy , slip (aerodynamics) , interferometric synthetic aperture radar , gnss applications , induced seismicity , shear (geology) , synthetic aperture radar , global positioning system , remote sensing , petrology , telecommunications , physics , computer science , thermodynamics
We analyze Global Navigation Satellite System (GNSS), Interferometric Synthetic Aperture Radar, and accelerometer data within the San‐in Shear Zone in order to clarify the coseismic and postseismic slip distributions associated with the M w 6.2 2016 Central Tottori earthquake. Inversion of the coseismic displacement data to estimate the slip distribution on the rupture fault shows a patch of large slip to the northwest of the hypocenter of the mainshock location. Relocated aftershocks and off‐fault seismicity 1 month after the mainshock are in agreement with stress change patterns caused by the mainshock fault. Inversion of near‐field GNSS displacements in 7 months following the earthquake under the assumption of afterslip does not show a preferred slip patch but rather a smooth distribution of the slip at shallow depths. Restricted slip propagation of afterslip on the 2016 event might suggest that inland faults in the San‐in Shear Zone are immature. Limited resolution of the GNSS data might inhibit us from finding the slip at depth.