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A significant relation between seismic activities and reflection intensities in the Japan Trench region
Author(s) -
Fujie Gou,
Kasahara Junzo,
Hino Ryota,
Sato Toshinori,
Shinohara Masanao,
Suyehiro Kiyoshi
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl013764
Subject(s) - induced seismicity , trench , seismology , geology , amplitude , reflection (computer programming) , seismic wave , refraction , variation (astronomy) , geophysics , physics , optics , chemistry , organic chemistry , layer (electronics) , computer science , astrophysics , programming language
There is a regional variation of seismicity in the Japan trench region characterized by cluster distribution of seismically active zones which persist for at least a few decades. We conducted seismic refraction‐reflection experiments there to clarify the relationship between seismicity and crustal structure. A velocity structure model was obtained by travel‐time inversion. Although there does not seem to be distinct relationship between seismicity and the bulk velocity structure, we found a good relationship between seismicity and variation of reflective amplitude. Large amplitude reflected waves generated at the plate boundary were observed at low seismicity region and vice versa.