Faculty Profiles - TAKENAKA Hiroshi

MISC - TAKENAKA Hiroshi

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Parallel 3-D pseudospectral simulation of seismic wave propagation

T Furumura, BLN Kennett, H Takenaka

GEOPHYSICS 63 ( 1 ) 279 - 288 1998.1

Language：English Publisher：SOC EXPLORATION GEOPHYSICISTS

Three-dimensional pseudospectral modeling for a realistic scale problem is still computationally very intensive, even when using current powerful computers. To overcome this, we have developed a parallel pseudospectral code for calculating the 3-D wavefield by concurrent use of a number of processors. The parallel algorithm is based on a partition of the computational domain, where the field quantities are distributed over a number of processors and the calculation is concurrently done in each subdomain with interprocessor communications. Experimental performance tests using three different styles of parallel computers achieved a fairly good speed up compared with conventional computation on a single processor: maximum speed-up rate of 26 using 32 processors of a Thinking Machine CM-5 parallel computer, 1.6 using a Digital Equipment DEC-Alpha two-CPU workstation, and 4.6 using a cluster of eight Sun Microsystems SPARC-Station 10 (SPARC-10) workstations connected by an Ethernet. The result of this test agrees well with the performance theoretically predicted for each system. To demonstrate the feasibility of our parallel algorithm, we show three examples: 3-D acoustic and elastic modeling of fault-zone trapped waves and the calculation of elastic wave propagation in a 3-D syncline model.

DOI： 10.1190/1.1444322

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Sensing of faults by waveform data of intermediate-depth earthquakes(共著)

Proceedings of the 4th SEGJ International Symposium 199 - 204 1998

Pseudo-spectral modeling of seismic waves in transversely isotropic media with an arbitrary direction of symmetrical axis(共著)

Proceedings of the 4th SEGJ International Symposium 117 - 122 1998

Recent developments in numerical methods for ground motion simulation(共著)

The Effect of Surface Geology on Seismic Motion, Irikura, Kudo, Okada & Sasani(eds. ), Balkema, Rotterdam(ISBN : 90 5809 030 2) 1 91 - 101 1998

Sensing of faults by waveform data of intermediate-depth earthquakes(共著)

Proceedings of the 4th SEGJ International Symposium 199 - 204 1998

鹿児島県北西部地域の地震波減衰特性〜Qc^-1の測定-(共著)

自然災害西部地区部会報・論文集 ( 22 ) 139 - 143 1998

Pseudo-spectral modeling of seismic waves in transversely isotropic media with an arbitrary direction of symmetrical axis(共著)

Proceedings of the 4th SEGJ International Symposium 117 - 122 1998

Programming for time-frequency analysis of transient seismic signals by multiple filter technique and running spectrum technique and its application (共著)

WANG Yanbin, TAKENAKA Hiroshi

Mem. Fac. Sci. , Kyushu Univ. , Ser. D, Earth Planet. Sci. 30 ( 1 ) 45 - 57 1998

1995年兵庫県南部地震の余震の地震核(共著)

月刊地球 ( 232 ) 648 - 653 1998

Programming for Time-frequency Analysis of Transient Seismic Signals by Multiple Filter Techniqeu and Running Spectrum Technique and Its Application

WANG Yanbin, TAKENAKA Hiroshi

Memoirs of the Faculty of Science, Kyushu University. Series D, Earth and planetary sciences 30 ( 1 ) 45 - 57 1998

1997年鹿児島県北西部地震余震の広帯域強震観測 (共著)

九大理学部研究報告(地球惑星) 20 ( 1 ) 25 - 46 1998

Recent developments in numerical methods for ground motion simulation(共著)

The Effect of Surface Geology on Seismic Motion, Irikura, Kudo, Okada & Sasani(eds. ), Balkema, Rotterdam(ISBN : 90 5809 030 2) 1 91 - 101 1998

第16章(シミュレーション)3.1 弾性波探査

物理探査学会編「物理探査ハンドブック」 851 - 862 1998

Measurement of stress drop for the aftershocks of the 1997 Northwestern Kagoshima earthquakes.

二牟礼勇人, 竹中博士, 藤井雄士郎, 松島健, 馬越孝道, 侭田豊, 鈴木貞臣

地球惑星科学関連学会合同大会予稿集 1998 1998

Observation and waveform modeling of the aftershocks of the 1997 Northwestern Kagoshima earthquake. (2).

藤井雄士郎, 竹中博士, 松島健, 馬越孝道, 二牟礼勇人, 鈴木貞臣

地球惑星科学関連学会合同大会予稿集 1998 1998

Source process of the largest aftershock of the 1997 Northwestern Kagoshima earthquakes.

藤井雄士郎, 竹中博士, 松島健, 馬越孝道, 鈴木貞臣

日本地震学会秋季大会講演予稿集 1998 1998

The velocity-structure analysis of upper mantle using he receiver function.

斉田智治, 末次大輔, 竹中博士

地球惑星科学関連学会合同大会予稿集 1998 1998

Decay rate of coda waves and attenuation of S waves around northwestern region of Kagoshima prefecture.

侭田豊, 竹中博士, 藤井雄士郎, 松島健, 馬越孝道, 二牟礼勇人

地球惑星科学関連学会合同大会予稿集 1998 1998

South Pacific Broadband Seismic Network. SPANET.

末次大輔, 神定健二, 吉田康宏, 井上公, 関口渉次, 竹中博士, 斉田智治, 藤井雄士郎

日本地震学会秋季大会講演予稿集 1998 1998

A recursive algorithm on the new basis for elastic waves in horizontally layered media. (II).

斉田智治, 竹中博士

地球惑星科学関連学会合同大会予稿集 1998 1998

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