Author Yamamoto, Hideki|
Published Date 2015-12-25
Publication Title Journal of the Faculty of Letters Okayama University
Volume volume64
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/ESR/54115
Title Alternative The effect of the seismic attenuation on the S-wave polarization anisotropy
FullText URL esr_022_1_001_007.pdf
Author Oda, Hitoshi|
Abstract We investigate the effect of the seismic attenuation on the shear-wave polarization anisotropy by numerical experiments. For the experiments, the P-wave receiver functions are synthesized by assuming that a plane P wave is incident on an anisotropic multi-layer structure with anelastic properties. The synthetic receiver function shows smooth Ps phase waveforms with small amplitudes due to the attenuation of high-frequency spectral components, compared to that calculated for a multi-layer structure with perfect elasticity. From the shear-wave splitting of the Ps converted phases in the synthetic receiver functions, the S-wave polarization anisotropies for the anisotropic layers are measured as a function of propagation direction of the incident P wave. Consequently, we conclude that the seismic attenuation has a minor influence on the measurements of the S-wave polarization anisotropy.
Keywords shear-wave polarization anisotropy shear-wave splitting seismic attenuation Psconverted phase P-wave receiver function
Publication Title Okayama University Earth Science Report
Published Date 2015-12-27
Volume volume22
Issue issue1
Start Page 1
End Page 7
ISSN 1340-7414
language 日本語
Copyright Holders © 2015 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
NAID 120005728633
JaLCDOI 10.18926/ESR/54116
Title Alternative Application of simulated annealing to focal mechanism determination
FullText URL esr_022_1_009_023.pdf
Author Komatsu, Masanao| Takenaka, Hiroshi|
Abstract Simulated annealing (SA) is known as one of the efficient methods for global optimization. It allows for getting an optimal solution by jumping out of local minimum. In this paper, we apply the simulated annealing to determination of focal mechanism solution. To investigate the feasibility of the application, we determine focal mechanism solution of the 14 March 2014 Iyo-Nada intermediatedepth earthquake. The computation of SA method is then 1278 times faster than that of the grid search method.
Keywords focal mechanism solution
Publication Title Okayama University Earth Science Report
Published Date 2015-12-27
Volume volume22
Issue issue1
Start Page 9
End Page 23
ISSN 1340-7414
language 日本語
Copyright Holders © 2015 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
NAID 120005728632
JaLCDOI 10.18926/ESR/54119
Title Alternative Facies analysis of the Jito Formation ( Upper Triassic Nariwa Group ) in Jito Area, Kawakami, Okayama Pref., SWJapan.
FullText URL esr_022_1_031_039.pdf
Author Masaoka, Yuto| Suzuki, Shigeyuki|
Abstract Facies analysis and analysis of stratigraphy together with folded structure of the Norian Jito Formation were studied in Jito Area, Kawakami, Okayama Pref., SW Japan. Results of regional mapping and measured sections reconstruct three-dimensionally distribution of the Jito Formation. The Jito Formation is sub-divided into the four new members; the Shimohira Muddy Sandstone Member, the Otofuji Coarse-grained Turbidite Member, the Misawa Fine-grained Turbidaite Member, and the Ide Conglomerate Sandstone Member in ascending order. The shimohira Muddy Sandstone Member is interpreted to be deposited in an inner-bay. The Otofuji Coarse-grained Turbidite Member and The Misawa Fine-grained Turbidite Member are considered to be deposited on a continental shelf. The Ide Conglomerate Sandstone Member is inferred to be a shallow marine deposit. As a result, the Jito Formation is regarded as one transgressive-regressive package.
Keywords Jito Formation Nariwa Group Norian facies analysis turbidite
Publication Title Okayama University Earth Science Report
Published Date 2015-12-27
Volume volume22
Issue issue1
Start Page 31
End Page 39
ISSN 1340-7414
language 日本語
Copyright Holders © 2015 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
NAID 120005728631
JaLCDOI 10.18926/ESR/54117
Title Alternative Petrography of foundation stones of the Bizen Kokubunji Temple, Okayama Prefecture, Japan ―an attempt to identify their collected site―
FullText URL esr_022_1_025_030.pdf
Author Suzuki, Shigeyuki| Nishimura, Norihide| Ariga, Yuji|
Abstract The Bizen Kokubunji Temple was constructed in the 8th century, in Maya, Akaiwa City, Okayama. Only foundation stones are preserved. Geological characteristics of the foundation stones suggest that they are collected from mountain area of Maya, about 300 to 800m west from the site. The similarity of the foundation stones and the rocks Maya are identified by the following characteristics. 1) Assemblage of rock types (high grade welded tuff breccia, tuff breccia, tuffaceous sandstone and conglomerate) are the same. 2) Lithology of the 3 rock type of the foundation stones and the rocks from Maya are the same. 3) Rheomorphic flow structures are developed in both high grade welded tuff breccia. 4)Mudstone fragments are contained in both high grade welded tuff breccia tuff breccia.
Keywords Bizen Kokubunji Temple foundation stone collected site Okayama
Publication Title Okayama University Earth Science Report
Published Date 2015-12-27
Volume volume22
Issue issue1
Start Page 25
End Page 30
ISSN 1340-7414
language 日本語
Copyright Holders © 2015 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved
File Version publisher
NAID 120005728630
Author Jin, Namtaek|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Kubota, Satoshi|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Ogino, Masaru|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Prichard, Caleb| Fast, Thomas|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Moriya, Tomomi|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Nakayama, Yoshikazu| Yoshioka, Kazushi|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Noro, Yasushi|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Fujiwara, Yuko|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Igarashi, Masumi|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author 岡田 典子|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Ueda, Kazuhiro|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Wickstrum, Yuuka|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Sun, Luyi|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Uzuka, Mariko| Oka, Masumi|
Published Date 2015-12-30
Publication Title Bulletin of Higher Education Okayama University
Volume volume11
Content Type Departmental Bulletin Paper
Author Kato, Kuranoshin| Kato, Haruko| Akagi, Rikako| Inada, Yoshihiko|
Published Date 2016-02
Publication Title Environmental Research & Control
Volume volume37
Content Type Departmental Bulletin Paper