96 research outputs found
Widespread seismicity excitation throughout central Japan following the 2011 M=9.0 Tohoku earthquake and its interpretation by Coulomb stress transfer
Author Posting. Ā© American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 38 (2011): L00G03, doi:10.1029/2011GL047834.We report on a broad and unprecedented increase in seismicity rate following the M=9.0 Tohoku mainshock for M ā„ 2 earthquakes over inland Japan, parts of the Japan Sea and Izu islands, at distances of up to 425 km from the locus of high (ā„15 m) seismic slip on the megathrust. Such an increase was not seen for the 2004 M=9.1 Sumatra or 2010 M=8.8 Chile earthquakes, but they lacked the seismic networks necessary to detect such small events. Here we explore the possibility that the rate changes are the product of static Coulomb stress transfer to small faults. We use the nodal planes of M ā„ 3.5 earthquakes as proxies for such small active faults, and find that of fifteen regions averaging ā¼80 by 80 km in size, 11 show a positive association between calculated stress changes and the observed seismicity rate change, 3 show a negative correlation, and for one the changes are too small to assess. This work demonstrates that seismicity can turn on in the nominal stress shadow of a mainshock as long as small geometrically diverse active faults exist there, which is likely quite common
Spatial distribution of static stress drops for aftershocks of the 2005 West Off Fukuoka Prefecture earthquake
Spatial variation in coda Q around the Nobi fault zone, central Japan: relation to S-wave velocity and seismicity
Simultaneous estimation of the dip angles and slip distribution on the faults of the 2016 Kumamoto earthquake through a weak nonlinear inversion of InSAR data
Search for reliable precursors: A case study of the seismic quiescence of the 2000 western Tottori prefecture earthquake
Interseismic deformation of the Nankai subduction zone, southwest Japan, inferred from three-dimensional crustal velocity fields
Deep structure of the Ou mountain range strain concentration zone and the focal area of the 2008 Iwate-Miyagi Nairiku earthquake, NE Japanāseismogenesis related with magma and crustal fluid
Source process and near-source ground motions of the 2005 West Off Fukuoka Prefecture earthquake
Vertical movements of the Murono mud volcano in Japan caused by the Naganoken Kamishiro Fault Earthquake in 2014
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