最終更新日 02/17 2021
研究内容 地震計に観測された地震波形と現実的な地下構造を仮定したシミュレーションの双方を用いて、 ３次元地下不均質構造中の地震動伝播特性や地下構造モデリングに関する研究を行っています。これまでの研究で明らかとなった３次元地下構造中の地震動伝播特性を応用し、地震のメカニズム解の推定や地震活動などのモニタリング研究も行っています。 主要論文・著書 Takemura, S., T. Furumura, and T. Saito, Distortion of the apparent S-wave radiation pattern in the high-frequency wavefield: Tottori-ken Seibu, Japan, Earthquake of 2000, Geophys. J. Int., 178, 2, 950--961, 2009. Furumura, T., S. Takemura, S. Noguchi, T. Takemoto, T. Maeda, K. Iwai and S. Padhy, Strong Ground Motions from the 2011 Off the Pacific Coast of Tohoku, Japan (Mw=9.0) Earthquake Obtained from a Dense Nation-wide Seismic Network, Landslides, 2, 333--338, 2011. Yoshimoto, K. and S. Takemura, A study on the predominant period of long-period ground motions in the Kanto Basin, Japan, Earth Planets Space, 60, 1, 100, , 2014. Takemura, S., T. Furumura and T. Maeda, Scattering of high-frequency seismic waves caused by irregular surface topography and small- scale velocity inhomogeneity, Geophys. J. Int., 201, 1, 459--474, 2015. Takemura, S., M. Akatsu, K. Masuda, K. Kajikawa and K. Yoshimoto, Long-period ground motions in a laterally inhomogeneous large sedimentary basin: observations and model simulations of long-period surface waves in the northern Kanto Basin, Japan, Earth Planets Space, 67, 1, 33, , 2015. Takemura, S., K. Shiomi, T. Kimura and T. Saito, Systematic difference between first-motion and waveform-inversion solutions for shallow offshore earthquakes due to a low-angle dipping slab, Earth Planets Space, 68, 1, 149, , 2016. Takemura, S., M. Kobayashi and K. Yoshimoto, Prediction of maximum P- and S-wave amplitude distributions incorporating frequency- and distance-dependent characteristics of the observed apparent radiation patterns, Earth Planet. Sci. Lett., 68, 1, 166, , 2016. Takemura, S., T. Maeda, T. Furumura and K. Obara, Constraining the source location of the 30 May 2015 (Mw 7.9) Bonin deep-focus earthquake using seismogram envelopes of high-frequency P waveforms: Occurrence of deep-focus earthquake at the bottom of a subducting slab, Geophys. Res. Lett., 43, 9, 4297--4302, 2016. Takemura, S., M. Kobayashi and K. Yoshimoto,, High-frequency seismic wave propagation within the heterogeneous crust: Effects of seismic scattering and intrinsic attenuation on ground motion modelling, Geophys. J. Int., 210, 3, 1806--1822, 2017. Maeda, T., S. Takemura and T. Furumura, OpenSWPC: An open-source integrated parallel simulation code for modeling seismic wave propagation in 3D heterogeneous viscoelastic media, Earth Planets Space, 69, 1, 102, , 2017. 武村俊介, 地震波解析と波動伝播計算に基づく地球内部の短波長不均質構造の研究, 地震2, 71, 13--41, 2018. Takemura, S., T. Matsuzawa, T. Kimura, T. Tonegawa and K. Shiomi, Centroid moment tensor inversion of shallow very low frequency earthquakes off the Kii Peninsula, Japan, using a three-dimensional velocity structure model, Geophys. Res. Lett., 45, 13, 6450--6458, 2018. Takemura, S., H. Kubo, T. Tonegawa, T. Saito and K. Shiomi, Modeling of long-period ground motions in the Nankai subduction zone: model simulation using the accretionary prism derived from oceanfloor local S-wave structures, Pure Appl. Geophys., 176, 2, 627--647, 2019. Takemura, S., T. Matsuzawa, A. Noda, T. Tonegawa, Y. Asano, T. Kimura and K. Shiomi, Structural characteristics of the Nankai Trough shallow plate boundary inferred from shallow very low frequency earthquakes, Geophys. Res. Lett., 46, 8, 4192--4201, 2019. Takemura, S., Noda, A., Kubota, T., Asano, Y., Matsuzawa, T., and Shiomi, K., Migrations and Clusters of Shallow Very Low Frequency Earthquakes in the Regions Surrounding Shear Stress Accumulation Peaks along the Nankai Trough, Geophys. Res. Lett., 46, 21, 11830--11840, 2019. Takemura, S., R. Okuwaki, T. Kubota, K. Shiomi, T. Kimura and A. Noda, Centroid moment tensor inversions of offshore earthquakes using a three-dimensional velocity structure model: slip distributions on the plate boundary along the Nankai Trough, Geophys. J. Int., 222, 2, 1109--1125, 2020. Takemura, S., Yabe., S and Emoto, K., Modelling high-frequency seismograms at ocean bottom seismometers: effects of heterogeneous structures on source parameter estimation for small offshore earthquakes and shallow low-frequency tremors, Geophys. J. Int., 223, 3, 1708--1723, 2020. Takemura, S., K. Yoshimoto and K. Shiomi, Long-period ground motion simulation using centroid moment tensor inversion solutions based on the regional three-dimensional model in the Kanto region, Japan, Earth Planets Space, 73, 1, 15, , 2021. |
