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
Author Nishi, Masaki| Oda, Hitoshi|
Published Date 1994-09-20
Publication Title Okayama University Earth Science Report
Volume volume1
Issue issue1
Content Type Departmental Bulletin Paper
Author Onishi, Seiji| Oda, Hitoshi|
Published Date 1996-09-20
Publication Title Okayama University Earth Science Report
Volume volume3
Issue issue1
Content Type Departmental Bulletin Paper
Author Tanaka, Takashi| Oda, Hitoshi|
Published Date 1997-09-20
Publication Title Okayama University Earth Science Report
Volume volume4
Issue issue1
Content Type Departmental Bulletin Paper
Author Oda, Hitoshi| Ito Aki|
Published Date 2000-09-20
Publication Title Okayama University Earth Science Report
Volume volume7
Issue issue1
Content Type Departmental Bulletin Paper
JaLCDOI 10.18926/ESR/13873
FullText URL earth_science_reports_010_1_11.pdf
Author Suzuki, Isao| Inouye, Yasushi| Oda, Hitoshi| Morioka, Masana|
Abstract Resonant frequencies for a single crystad diopside sphere are measured accurately and rhirteen elastic moduli are reluced by the least squares calculation, A set of mduli gives theoretical resonant frequencies close enough to the observed ones.
Keywords diopside single crystal resonace sphere elasticity
Publication Title Okayama University Earth Science Report
Published Date 2003-12-20
Volume volume10
Issue issue1
Start Page 11
End Page 14
ISSN 1340-7414
language 英語
Copyright Holders 岡山大学地球科学研究報告編集委員会
File Version publisher
NAID 120002310552
JaLCDOI 10.18926/ESR/13861
Title Alternative 重力異常データのカラムインバージョンから見積もったモホ不連続面の形状
FullText URL earth_science_reports_011_1_1.pdf
Author Fukunaga, Mariko| Oda, Hitoshi| Shichi, Ryuichi|
Abstract We present an inversion method, called "column inversion", to retrieve two-dimensional variation of the depth to the Moho discontinuity from Bouguer gravity anomaly data, assuming that a density jump between the lower crust and upper mantle is regionally invariant. The inversion method is applied to reveal the apatial undulation of the Moho discontinuity in the Chugoku and Shikoku districts, southwest Japan. The result shows that the Moho is deep in the land area and shallow in the sea area. The Moho is anomalously deep in the west regions of Shikoku and Chugoku districts, where the prominent negative gravity anomaly is observed. The two-dimensional variation of the Moho depth is quite similar to that determined by inversion of the first P-arrival time data. The column inversion of the Bouguer gravity anomaly data is proved to be useful for determining the fine structure of the Moho discontinuity undulation.
Keywords Bouguer Gravity Anomaly Column Inversion Moho Discontinuity Chugoku and Shikoku Districts
Publication Title Okayama University Earth Science Report
Published Date 2004-12-31
Volume volume11
Issue issue1
Start Page 1
End Page 5
ISSN 1340-7414
language 英語
Copyright Holders 岡山大学地球科学研究報告編集委員会
File Version publisher
NAID 120002310563