前田拓人

J-GLOBALへ         更新日: 18/11/08 11:29
 
アバター
研究者氏名
前田拓人
 
マエダ タクト
URL
http://www.st.hirosaki-u.ac.jp/~tktmyd
所属
弘前大学
部署
大学院理工学研究科
職名
准教授
学位
博士(理学)(東北大学)
科研費研究者番号
90435579
ORCID ID
0000-0002-8861-4597

研究分野

 
 

経歴

 
2018年4月
 - 
現在
弘前大学 大学院理工学研究科 准教授
 
2012年4月
 - 
2018年3月
東京大学 地震研究所 助教
 
2011年4月
 - 
2012年3月
東京大学 大学院情報学環 特任助教
 
2009年4月
 - 
2011年3月
東京大学 大学院情報学環 特任研究員
 
2006年4月
 - 
2009年3月
防災科学技術研究所 契約研究員(研究員型)
 

学歴

 
1997年4月
 - 
2001年3月
東北大学 理学部 宇宙地球物理学科
 
2001年4月
 - 
2003年3月
東北大学 大学院理学研究科 地球物理学専攻
 
2003年4月
 - 
2006年3月
東北大学 大学院理学研究科 地球物理学専攻
 

受賞

 
2015年10月
東北大学泉萩会 森田記念賞
 
2014年5月
Earth Planets, Space 2013 EPS Award
 
2014年4月
平成26年度科学技術分野の文部科学大臣表彰 若手科学者賞
 
2013年5月
日本地震学会 若手学術奨励賞
 
2012年5月
日本地震学会 論文賞
 

書籍等出版物

 
Seismic wave propagation and scattering in the heterogeneous earth, second edition
Haruo Sato, Michael C. Fehler, and Takuto Maeda (担当:共著)
Springer   2012年3月   ISBN:3642230288
Seismic waves - generated both by natural earthquakes and by man-made sources - have produced an enormous amount of information about the Earth's interior. In classical seismology, the Earth is modeled as a sequence of uniform horizontal layers (o...

論文

 
Ryota Takagi, Kiwamu Nishida, Takuto Maeda, Kazushige Obara
Geophysical Journal International   215(3) 1682-1699   2018年12月   [査読有り]
The polarization of seismic waves can be used to infer the directionality of the ambient noise wavefield. We demonstrate a simple relationship between the vertical–horizontal cross-spectra at a single station and the azimuthal energy distribution ...
Yuchen Wang, Kenji Satake, Takuto Maeda, Aditya Riadi Gusman
Earth, Planets and Space   70(1)    2018年8月   [査読有り]
We present a method of tsunami data assimilation using a linear dispersive model in order to provide an accurate tsunami early warning. To speed up the assimilation process, we use the Green’s function-based tsunami data assimilation, in which the...
Masayuki Kano, Naofumi Aso, Takanori Matsuzawa, Satoshi Ide, Satoshi Annoura, Ryuta Arai, Satoru Baba, Michael Bostock, Kevin Chao, Kosuke Heki, Satoshi Itaba, Yoshihiro Ito, Noriko Kamaya, Takuto Maeda, Julie Maury, Mamoru Nakamura, Takuya Nishimura, Koichiro Obana, Kazuaki Ohta, Natalia Poiata, Baptiste Rousset, Hiroko Sugioka, Ryota Takagi, Tsutomu Takahashi, Akiko Takeo, Yoko Tu, Naoki Uchida, Yusuke Yamashita, Kazushige Obara
Seismological Research Letters   89(4) 1566   2018年6月   [査読有り]
This article describes a database that provides various catalogs of slow earthquakes. The catalogs list the times and the locations of the events, with additional information depending on the catalog. Because these catalogs are provided by a varie...
Ryo Kurihara, Kazushige Obara, Akiko Takeo, Takuto Maeda
Geophysical Research Letters   45(8) 3413   2018年4月   [査読有り]
Deep low‐frequency tremor triggered by teleseismic surface waves is concentrated in several locations along the ambient tremor source region in the Nankai subduction zone, southwest Japan. We systematically investigated triggered tremor in norther...
Satoru Baba, Akiko Takeo, Kazushige Obara, Aitaro Kato, Takuto Maeda, Takanori Matsuzawa
Geophysical Research Letters   45(2) 733   2018年1月   [査読有り]
We investigated long‐term changes in the activity of deep very low frequency earthquakes (VLFEs) in western Shikoku, southwest part of the Nankai subduction zone in Japan for 13 years by the matched‐filter technique. VLFE activity is expected to b...
Yuchen Wang, Kenji Satake, Takuto Maeda, Aditya Riadi Gusman
Geophysical Research Letters   44(20) 10,282   2017年10月   [査読有り]
We propose a new tsunami data assimilation approach based on Green's functions to reduce the computation time for tsunami early warning. Green's Function‐based Tsunami Data Assimilation (GFTDA) forecasts the waveforms at points of interest (PoIs) ...
Hanae Morioka, Hiroyuki Kumagai, Takuto Maeda
Journal of Geophysical Research   122 6538-6551   2017年8月   [査読有り]
The source location method using high‐frequency seismic amplitudes based on the assumption of isotropic radiation of S waves has been used successfully to locate seismic events and tremor at volcanoes. This amplitude source location (ASL) method o...
Takuto Maeda, Shunsuke Takemura, and Takashi Furumura
Earth, Planets and Space   69 102   2017年7月   [査読有り]
We have developed an open-source software package, Open-source Seismic Wave Propagation Code (OpenSWPC), for parallel numerical simulations of seismic wave propagation in 3D and 2D (P-SV and SH) viscoelastic media based on the finite difference me...
Mitsuhiro Toya, Aitaro Kato, Takuto Maeda, Kazushige Obara, Tetsuya Takeda, and Koshun Yamaoka
Scientific Reports   7 2868   2017年6月   [査読有り]
Fluids are thought to play an important role in controlling episodic tremor and slow slip (ETS) in subduction zones. Therefore, constraining the along-dip distribution of fluids is necessary to better understand source mechanism of ETS, and partic...
Dun Wang, Hitoshi Kawakatsu, Jiancang Zhuang, Jim Mori, Takuto Maeda, Hiroshi Tsuruoka, and Xu Zhao
Geophysical Research Letters   44(11) 5447-5456   2017年6月   [査読有り]
Fast estimates of magnitude and source extent of large earthquakes are fundamental for disaster mitigation. However, resolving these estimates within 10–20 min after origin time remains challenging. Here we propose a robust algorithm to resolve ma...
Masaru Todoriki, Takashi Furumura, and Takuto Maeda
Geophysical Journal International   208(1) 226-233   2017年   [査読有り]
We investigated the effects of sea water on the propagation of seismic waves using a 3-D finite-difference-method simulation of seismic wave propagation following offshore earthquakes. When using a 1-D layered structure, the simulation results sho...
Ryota Takagi, Kazushige Obara, and Takuto Maeda
Geophysical Research Letters   43(3) 1066-1074   2016年   [査読有り]
We report on two small long-term slow slip events (SSEs) within a gap between tremor and locked zones in the Nankai subduction zone, southwest Japan. The SSEs were detected by subtracting the steady state component and postseismic effects of large...
Shinako Noguchi, Takuto Maeda, and Takashi Furumura
Geophysical Journal International   205(2) 1099-1107   2016年   [査読有り]
We investigate the cause of anomalously long duration (>100 s), long-period (T = 13–14 s) phase packets following the Rayleigh wave, which are observed widely in eastern Japan during outer-rise earthquakes. As this phase is not seen in records of ...
Satoshi Annoura, Kazushige Obara, and Takuto Maeda
Geophysical Research Letters   43(6) 2562-2567   2016年   [査読有り]
We estimated the total seismic energy of deep low-frequency tremor in the Nankai subduction zone, southwest Japan, over an 11 year period. For precise estimation, the continuous time sequence of tremor activity was carefully detected using a proce...
Takuto Maeda, Hiroaki Tsushima, and Takashi Furumura
Earth, Planets and Space   68 63   2016年   [査読有り]
We numerically simulated the propagation of tsunami waves with finite difference methods by using perfectly matched layer (PML) boundary conditions to effectively eliminate artificial reflections from model boundaries. The PML method damps the tsu...
Aditya Riadi Gusman, Anne F. Sheehan, Kenji Satake, Mohammad Heidarzadeh, Iyan Eka Mulia, and Takuto Maeda
Geophysical Research Letters   43(9) 4189-4196   2016年   [査読有り]
We use tsunami waveforms recorded on a dense array of seafloor pressure gauges offshore Oregon and California from the 2012 Haida Gwaii, Canada, earthquake to simulate the performance of two different real-time tsunami-forecasting methods. In the ...
Shunsuke Takemura, Takuto Maeda, Takashi Furumura, and Kazushige Obara
Geophysical Research Letters   43(9) 4297-4302   2016年   [査読有り]
In this study, the source location of the 30 May 2015 (Mw 7.9) deep-focus Bonin earthquake was constrained using P wave seismograms recorded across Japan. We focus on propagation characteristics of high-frequency P wave. Deep-focus intraslab earth...
Nana Yoshimitsu, Takashi Furumura, and Takuto Maeda
Journal of Applied Geophysics   132 184-192   2016年   [査読有り]
The coda part of a waveform transmitted through a laboratory sample should be examined for the high-resolution monitoring of the sample characteristics in detail. However, the origin and propagation process of the later phases in a finite-sized sm...
Takuto Maeda, Kiwamu Nishida, Ryota Takagi, and Kazushige Obara
Progress in Earth and Planetary Science   3 31   2016年   [査読有り]
We reconstructed a 2D seismic wavefield and obtained its propagation properties by using the seismic gradiometry method together with dense observations of the Hi-net seismograph network in Japan. The seismic gradiometry method estimates the wave ...
組み合わせ最適化手法を利用した歴史津波の波源推定法—1611年慶長奥州地震の事例—
今井健太郎・前田拓人・飯沼卓史・蝦名裕一・菅原大介・今村文彦・平川新
東北地域災害科学研究   51 139-144   2015年
Shunsuke Takemura, Takashi Furumura, and Takuto Maeda
Geophysical Journal International   201(1) 459-474   2015年   [査読有り]
Based on 3-D finite difference method simulations of seismic wave propagation, we examined the processes by which the complex, scattered high-frequency (f > 1 Hz) seismic wavefield during crustal earthquakes is developed due to heterogeneous struc...
Ryota Takagi, Kiwamu Nishida, Yosuke Aoki, Takuto Maeda, Komei Masuda, Minoru Takeo, Kazushige Obara, Katsuhiko Shiomi, Minemori Sato, and Kazuo Saito
Seismological Research Letters   86(3) 901-907   2015年   [査読有り]
Takuto Maeda, Kazushige Obara, Masanao Shinohara, Toshihiko Kanazawa, and Kenji Uehira
Geophysical Research Letters   42(19) 7923-7932   2015年   [査読有り]
We propose a tsunami forecasting method based on a data assimilation technique designed for dense tsunameter networks. Rather than using seismic source parameters or initial sea surface height as the initial condition of for a tsunami forecasting,...
Osamu Sandanbata, Kazushige Obara, and Takuto Maeda, Ryota Takagi, Kenji Satake
Geophysical Research Letters   42(23) 10256-10262   2015年   [査読有り]
We observed the activity of long-period tremors (LPTs) with a period of ~15 s at Aso volcano, Japan, during a 3 year period including the 2014 eruptions. The number of LPTs detected systematically increased 3 months before the Strombolian eruption...
Luolei Zhang, Hisashi Utada, Hisayoshi Shimizu, Kiyoshi Baba, and Takuto Maeda
Journal of Geophysical Research   119(1) 150-168   2014年   [査読有り]
The motion of seawater induces electromotive force of significant intensity due to Faraday's law, and the resulting electromagnetic (EM) field can be recorded by instruments installed on land or on the ocean bottom. However, few studies have succe...
Takuto Maeda, Takashi Furumura, and Kazushige Obara
Earth and Planetary Science Letters   397 101-110   2014年   [査読有り]
We detected a scattered wave train in data from the high-sensitivity seismograph network in Japan (Hi-net) following the arrival of the near-vertically incident P-wave generated by the 2009 earthquake (Mw 7.8) off the South Island of New Zealand. ...
Simanchal Padhy, Takashi Furumura, and Takuto Maeda
Journal of Geophysical Research   119(11) 8478-8501   2014年   [査読有り]
The fine-scale seismic structure of the northeast Japan subduction zone is studied based on waveform analyses of moderate-sized (M4.5–6), deep-focus earthquakes (h >350 km) and the finite difference method (FDM) simulation of high-frequency (up to...
Shinako Noguchi, Takuto Maeda, and Takashi Furumura
Pure and Applied Geophysics   170(1-2) 95-108   2013年   [査読有り]
We investigated the development of a distinct later phase observed at stations near the Japan Trench associated with shallow, outer-rise earthquakes off the coast of Sanriku, northern Japan based on the analysis of three-component broadband seismo...
Takuto Maeda and Takashi Furumura
Pure and Applied Geophysics   170(1-2) 109-127   2013年   [査読有り]
We have developed a new, unified modeling technique for the total simulation of seismic waves, ocean acoustic waves, and tsunamis resulting from earthquakes, based on a finite difference method simulation of the 3D equations of motion. Using the e...
Simanchal Padhy, Shunsuke Takemura, Teito Takemoto, Takuto Maeda, and Takashi Furumura
Bulletin of the Seismological Society of America   103(2B) 1411-1428   2013年   [査読有り]
The spatial and temporal variations of coda attenuation (Graphic) were studied in the source region of the 2011 Off the Pacific Coast of Tohoku, Japan (Mw 9) earthquake. The Graphic values were determined from the amplitude decay rate of the S‐wav...
Takuto Maeda, Takashi Furumura, Shinako Noguchi, Shunsuke Takemura, Shin'ichi Sakai, Masanao Shinohara, Kazuhisa Iwai, and Shiann-Jong Lee
Bulletin of the Seismological Society of America   103(2B) 1456-1472   2013年   [査読有り]
The 2011 Tohoku earthquake (M 9.0) caused significant hazards including strong ground motion, coseismic ground deformation, and tsunamis. For a deeper understanding of these phenomena, we conducted a large‐scale, parallel computer simulation by me...
Yusuke Oishi, Matthew D. Piggott, Takuto Maeda, Stephan C. Kramer, Gareth S. Collins, Hiroaki Tsushima, and Takashi Furumura
Journal of Geophysical Research   118(6) 2998-3018   2013年   [査読有り]
Large-scale tsunami propagation simulations from the fault region to the coast are conducted using a three-dimensional (3-D) parallel unstructured mesh finite element code (Fluidity-ICOM). Unlike conventional 2-D approximation models, our tsunami ...
井上 俊介, 堤 重信, 前田 拓人, 南 一生
情報処理学会論文誌:コンピューティングシステム   6(3) 22-30   2013年
理化学研究所では,スーパーコンピュータ「京」の高性能化を目的とし,6本の重点アプリケーションを選定し,高性能化,高並列化を進めてきた.うち地球科学の分野から選択された地震動シミュレーションコードであるSeism3Dについては,比較的高いByte/Flop値を要求する演算と,隣接プロセス間のみの通信という特徴があげられる.よって,Seism3Dの高性能化,高並列化のポイントとして,メモリバンド幅を最大限に生かすこと,キャッシュの効率的な利用をすること,6次元メッシュ上での最適な隣接通信を実現...
Kazushige Obara, Takanori Matsuzawa, Sachiko Tanaka, and Takuto Maeda
Geophysical Research Letters   39 L10308   2012年   [査読有り]
We investigated the migration mode of deep non-volcanic tremor activity beneath Kii Peninsula, southwest Japan. Major tremor episodes are characterized by long-term migration with a velocity of about 10 km/day, propagating along the strike of the ...
Teito Takemoto, Takashi Furumura, Tatsuhiko Saito, Takuto Maeda, and Shinako Noguchi
Bulletin of the Seismological Society of America   102(4) 1462-1476   2012年   [査読有り]
We have estimated broadband (f=0.5–8  Hz) site amplification factors at 1800 sites in Japan based on the coda normalization method using 4001 seismograms obtained from 48 events. The results show that, in the low‐frequency band (f=0.5–1  Hz), the ...
Takanori Matsuzawa, Kazushige Obara, Takuto Maeda, Youichi Asano, and Tatsuhiko Saito
Bulletin of the Seismological Society of America   102(4) 1864-1871   2012年   [査読有り]
Love‐ and Rayleigh‐wave microseisms with a dominant period of about 20 s have been clearly detected in Japan. Because their arrival direction was almost the same in any part of the Japanese islands, they are expected to have propagated as plane wa...
南 一生・井上俊介・堤重信・前田拓人・長谷川幸弘・黒田明義・寺井優晃・横川三津夫
ハイパフォーマンスコンピューティングと計算科学シンポジウム論文集   2012 23-31   2012年   [査読有り]
疎行列とベクトルの積は、流体や構造計算等の工学や地球科学の分野で多く使用されている計算カーネルであり、プログラムの要求する B/F 値が高く、スカラマシンでは高い CPU 単体性能を得る事が難しい。本稿では、京速コンピュータ 「京」 の汎用マシンとしての性能を実証するために準備しているアプリケーションである Seism3D と FrontFlow/Blue の計算カーネルを題材に、性能の予測方法の提示、実測による性能評価、評価結果に基づくチューニング手法の提示、チューニング結果の性能評価に...
Takashi Furumura, Kentaro Imai, and Takuto Maeda
Journal of Geophysical Research   116(B2) B02308   2011年   [査読有り]
Based on many recent findings such as those for geodetic data from Japan's GEONET nationwide GPS network and geological investigations of a tsunami-inundated Ryujin Lake in Kyushu, we present a revised source rupture model for the great 1707 Hoei ...
Aitaro Kato, Shinichi Sakai, Takashi Iidaka, Takaya Iwasaki, Eiji Kurashimo, Toshihiro Igarashi, Naoshi Hirata, Toshihiko Kanazawa, Kei Katsumata, Hiroaki Takahashi, Ryo Honda, Takahiro Maeda, Masayoshi Ichiyanagi, Teruhiro Yamaguchi, Masahiro Kosuga, Tomomi Okada, Junichi Nakajima, Shuichiro Hori, Takashi Nakayama, Akira Hasegawa, Toshio Kono, Syuichi Suzuki, Noriko Tsumura, Yoshihiro Hiramatsu, Katsunori Sugaya, Aiko Hayashi, Tetsuya Hirose, Akihiro Sawada, Keisuke Tanaka, Yoshiko Yamanaka, Haruhisa Nakamichi, Takashi Okuda, Yoshihisa Iio, Kin'ya Nishigami, Masatoshi Miyazawa, Hiroo Wada, Norio Hirano, Hiroshi Katao, Shiro Ohmi, Kiyoshi Ito, Issei Doi, Shunta Noda, Satoshi Matsumoto, Takeshi Matsushima, Atsushi Saiga, Hiroki Miyamachi, Kazutoshi Imanishi, Tetsuya Takeda, Youichi Asano, Yohei Yukutake, Tomotake Ueno, Takuto Maeda, Takanori Matsuzawa, Shutaro Sekine, Makoto Matsubara, and Kazushige Obara
Geophysical Research Letters   38(6) L06306   2011年   [査読有り]
We have elucidated depth variations in the stress field associated with the 2007 Noto Hanto, Japan, earthquake by stress tensor inversion using high-quality aftershock data obtained by a dense seismic network. Aftershocks that occurred above 4 km ...
Kazushige Obara, Takanori Matsuzawa, Sachiko Tanaka, Takeshi Kimura, and Takuto Maeda
Geophysical Research Letters   38(9) L09311   2011年   [査読有り]
Based on the precise locations of deep non-volcanic tremor in southwest Japan, which show a depth-dependent behavior, we clarified characteristic properties of tremor migration. Major tremor swarms are mainly initiated at deep levels of the tremor...
Takashi Furumura, Shunsuke Takemura, Shinako Noguchi, Teito Takemoto, Takuto Maeda, Kazuhisa Iwai, and Simanchal Padhy
Landslides   8(3) 333-338   2011年   [査読有り]
The dense recordings of the K-NET and KiK-net nationwide strong motion network of 1,189 accelerometers show clearly the radiation and propagation properties of the strong ground motions associated with the 2011 off-the-Pacific Coast-of-Tohoku, Jap...
Takuto Maeda, Takashi Furumura, Shin'ichi Sakai, and Masanao Shinohara
Earth, Planets and Space   63(7) 803-808   2011年   [査読有り]
The 2011 Tohoku Earthquake caused a devastating tsunami along the shoreline from the Tohoku to Kanto districts. Although many of the tide gauge stations along the Tohoku coast were saturated or damaged due to the tsunami, two cabled ocean-bottom t...
Takuto Maeda, Kazushige Obara, Takashi Furumura, and Tatsuhiko Saito
Journal of Geophysical Research   116 B10303   2011年   [査読有り]
In order to recover small signals of long-period ground motions recorded by a short-period seismometer, we designed a time domain recursive filter that simulates seismic waves recorded with broadband seismometers. We applied the time domain filter...
Hisashi Utada, Hisayoshi Shimizu, Tsutomu Ogawa, Takuto Maeda, Takashi Furumura, Tetsuya Yamamoto, Nobuyuki Yamazaki, Yuki Yoshitake, and Shingo Nagamachi
Earth and Planetary Science Letters   311(1-2) 11-27   2011年   [査読有り]
Does the geomagnetic field change in association with Earthquakes? This question was first raised more than 100 years ago, and since that time, theoretical and observational researches have been conducted in order to obtain an answer to this quest...
Kazushige Obara, Sachiko Tanaka, Takuto Maeda, and Takanori Matsuzawa
Geophysical Research Letters   37(13) L13306   2010年   [査読有り]
With a new location method, we obtained a high-resolution map of non-volcanic tremor along the subducting Philippine Sea plate in southwest Japan and clarified the depth-dependent behavior of the tremor activity. A bimodal distribution of tremor a...
Hiroyuki Kumagai, Masaru Nakano, Takuto Maeda, Hugo Yepes, Pablo Palacios, Mario Ruiz, Santiago Arrais, Mayra Vaca, Indira Molina, and Tadashi Yamashima
Journal of Geophysical Research   115(B8) B08303   2010年   [査読有り]
We systematically used two approaches to analyze broadband seismic signals for monitoring active volcanoes: one is waveform inversion of very-long-period (VLP) signals assuming possible source mechanisms; the other is a source location method of l...
Tomotake Ueno, Takuto Maeda, Kazushige Obara, Youichi Asano, and Tetsuya Takeda
Journal of Geophysical Research   115(B9) B00A26   2010年   [査読有り]
Multiple-array observation above a belt-like tremor zone was conducted to investigate the detailed location and migration of tremor activity in western Shikoku, Japan. In March 2007, an episodic tremor and slip event occurred, and highly coherent ...
Hitoshi Hirose, Youichi Asano, Kazushige Obara, Takeshi Kimura, Takanori Matsuzawa, Sachiko Tanaka, and Takuto Maeda
Science   330(6010) 1502   2010年   [査読有り]
We identified a strong temporal correlation between three distinct types of slow earthquakes distributed over 100 kilometers along the dip of the subducting oceanic plate at the western margin of the Nankai megathrust rupture zone, southwest Japan...
Takuto Maeda, Kazushige Obara, and Yohei Yukutake
Earth, Planets and Space   62(9) 685-691   2010年   [査読有り]
We found a recurring seismic velocity decrease associated with small earthquake swarms experienced in 2007 in a geothermal area in Kyushu, southwestern Japan, by analyzing long-term changes in the autocorrelation function (ACF) of seismic noise. T...
Takuto Maeda and Kazushige Obara
Report of the National Research Institute for Earth Science and Disaster Prevention   74 12-20   2009年
Kazushige Obara and Takuto Maeda
Geophysical Research Letters   36(8) L08304   2009年   [査読有り]
Analysis of seismo-acoustic T waves associated with an intermediate-depth earthquake beneath northern Japan reveals that the detected T waves are secondary waves scattered by distant seamounts. The timing of T-wave onset, 3000 s after occurrence o...
Hiroyuki Kumagai, Pablo Palacios, Takuto Maeda, Diego Barba Castillo, and Masaru Nakano
Journal of Volcanology and Geothermal Research   183(1-2) 112-121   2009年   [査読有り]
Debris flows, or lahars, frequently occur in volcanic regions and cause serious disasters to nearby communities. Lahars are commonly observed as long-lasting, high-frequency tremor in seismic records. We propose a seismic technique to locate the s...
Takuto Maeda and Kazushige Obara
Journal of Geophysical Research   114(B10) B00A09   2009年   [査読有り]
The spatiotemporal patterns of the radiated seismic energy from low-frequency tremor associated with slow slip events in western Shikoku, Japan, have been estimated. A spatially decaying mean square amplitude and differential traveltime measuremen...
Takanori Matsuzawa, Kazushige Obara, and Takuto Maeda
Journal of Geophysical Research   114(B11) B00A11   2009年   [査読有り]
The source durations of very low frequency earthquakes in western Shikoku, Japan were estimated. Nineteen very low frequency earthquakes were located in this region between 14 and 17 March 2007 that migrated southward with tremor activity. The sou...
Yoshihiro Ito, Kazushige Obara, Takanori Matsuzawa, and Takuto Maeda
Journal of Geophysical Research   114(B11) B00A13   2009年   [査読有り]
Very low frequency (VLF) seismic signals observed in southwestern Japan are evidently radiated from shear slips on the upper surface of the subducting Philippine Sea Plate. We used grid moment tensor inversion and centroid moment tensor inversion ...
酒井 慎一, 加藤 愛太郎, 蔵下 英司, 飯高 隆, 五十嵐 俊博, 平田 直, 岩崎 貴哉, 金沢 敏彦, 渡辺 茂, 羽田 敏夫, 小林 勝, 三浦 勝美, 三浦 禮子, 田上 貴代子, 荻野 泉, 坂 守, 渡邉 篤志, 宮川 幸治, 勝俣 啓, 高橋 浩晃, 笠原 稔, 本多 亮, 前田 宜浩, 一柳 昌義, 山口 照寛, 小菅 正裕, 岡田 知己, 中島 淳一, 堀 修一郎, 中山 貴史, 新居 恭平, 長谷川 昭, 河野 俊夫, 鈴木 秀市, 津村 紀子, 小林 里紗, 野崎 謙治, 平松 良浩, 菅谷 勝則, 林亜 以子, 広瀬 哲也, 澤田 明宏, 田中 敬介, 山中 佳子, 中道 治久, 奥田 隆, 飯尾 能久, 西上 欽也, 宮澤 理稔, 和田 博夫, 平野 憲雄, 中尾 節郎, 片尾 浩, 大見 士朗, 伊藤 潔, 澁谷 拓郎, 加納 靖之, 土井 一生, 野田 俊太, 片木 武, 西辻 陽平, 松本 聡, 松島 健, 雑賀 敦, 宮町 宏樹, 今西 和俊, 桑原 保人, 長 郁夫, 干野 真, 武田 哲也, 浅野 陽一, 行竹 洋平, 上野 友岳, 前田 拓人, 松澤 孝紀, 関根 秀太郎, 松原 誠, 小原 一成
東京大學地震研究所彙報   82(3) 225-233   2008年
The 2007 Noto Hanto Earthquake occurred on March 25, 2007, in the Noto Peninsula, central Japan. A half day after the main shock, we started installing temporary seismic stations in order to determine the precise locations of its aftershocks. Te...
Takuto Maeda, Haruo Sato, and Takeshi Nishimura
Geophysical Journal International   172(1) 130-154   2008年   [査読有り]
Seismograms of local earthquakes consist of not only direct waves but also coda waves originating from scattering due to lithospheric inhomogeneities. As a mathematical basis for interpreting these seismograms, we present a synthesis of coda wave ...
偏極方向と非等方多重散乱を考慮した3成分S波コーダエンベロープの数値合成
前田拓人
月刊地球   29 232-236   2007年
Takuto Maeda, Haruo Sato, and Masakazu Ohtake
Pure and Applied Geophysics   163(2-3) 549-566   2006年   [査読有り]
Aki (1969) first modeled coda waves of a local earthquake as a superposition of scattered surface waves. This paper attempts to clarify the constituents of surface-wave coda at long periods at very long lapse times. For a large earthquake of magni...
Takuto Maeda, Haruo Sato, and Masakazu Ohtake
Geophysical Research Letters   30(6) 1286   2003年   [査読有り]
Surface waves propagating around the spherical Earth are scattered by medium heterogeneities and topographical variations. Wave trains appearing between the multiple arrivals of surface waves are interpreted as scattered waves. Mean-Squared (MS) e...
田中聡・浜口博之・山脇輝夫・西村太志・植木貞人・中道治久・宮町宏樹・筒井智樹・松尾のり道・及川純・大湊隆雄・宮岡一樹・鬼澤真也・森健彦・相澤幸司・中原恒・堀修一郎・佐藤俊也・河野俊夫・仁田交市・立花憲司・鍵山恒臣・萩原道徳・長田昇・井本良子・辻浩・岡田弘・前川徳光・鈴木敦生・小菅正裕・山本英和・佐野剛・奥田隆・山本圭吾・吉川慎・外輝明・松本聡・八木原寛・平野舟一郎・金尾正紀・巻和夫,小林徹,神出裕一郎,高橋透,鶴我佳代子,佐藤峰司,橋野弘憲,諏訪謡子,武田嘉人,山下哲央, Ulrich Wegler,内田直希,池田雅也・高橋努・前田拓人・馬渕弘靖・千田良道・相澤信吾・久野智晴・大谷佳子・山下幹也・小林勝幸・長濱庸介・平山繁幸・岩切誠一郎・伊藤壮介・吉川美由紀・中村めぐみ・大島光貴・森脇健
東京大学地震研究所彙報   77(1) 1-25   2002年
Seismic exploration at Iwate volcano in northeastern Japan was conducted by a group of researchers from 11 national universities in Japan, National Institute of Polar Research, and Japan Meteorological Agency in October 2000. This exploration is t...

Misc

 
T波
小原一成・前田拓人
地震学会広報誌なゐふる   75 2-3   2009年
「京」が描き出す地震波と津波
前田拓人
地震学会広報誌なゐふる   92 2-3   2013年

競争的資金等の研究課題

 
学術振興会: 科研費 基盤研究(B)
研究期間: 2016年4月 - 2020年3月    代表者: 今井 健太郎
学術振興会: 科研費 若手研究(B)
研究期間: 2015年4月 - 2018年3月    代表者: 前田拓人
学術振興会: 科研費 若手研究(B)
研究期間: 2011年4月 - 2013年3月    代表者: 前田拓人
学術振興会: 科研費 基盤研究(A)
研究期間: 2011年4月 - 2014年3月    代表者: 小原一成
学術振興会: 科学研究費 特別研究員奨励費
研究期間: 2003年4月 - 2005年3月    代表者: 前田拓人

委員歴

 
2018年4月
 - 
現在
日本地球惑星科学連合  代議員
 
2016年11月
 - 
現在
地震調査研究推進本部政策委員会調査観測計画部会 海域観測に関する検討ワーキンググループ  専門委員
 
2016年4月
 - 
2017年3月
日本地震学会  欧文誌運営委員会委員
 
2015年1月
 - 
現在
Earth, Planets and Space  Editorial Board Member
 
2014年4月
 - 
現在
日本地震学会  通常代議員
 
2015年10月
 - 
2016年3月
日本地震学会  学生優秀発表賞選考委員会委員
 
2015年10月
 - 
2016年3月
日本地震学会  選挙管理委員会委員
 
2013年4月
 - 
2016年3月
日本地震学会  広報委員会
 

担当経験のある科目

 
 

Works

 
前田拓人   コンピュータソフト   
前田拓人   コンピュータソフト   
前田拓人   コンピュータソフト   
前田拓人   コンピュータソフト   

社会貢献活動

 
【出演】  弘前大学理工学部  地震災害軽減に関するシンポジウム  2018年5月18日 - 2018年5月18日
【出演, 講師】  日本地震学会  地震学夏の学校2015  2015年9月7日 - 2015年9月9日
【出演】  独立行政法人理化学研究所  スーパーコンピュータ「京」を知る集い in 広島  2012年10月6日 - 2012年10月6日
【出演】  独立行政法人理化学研究所  京速コンピュータ「京」を知る集い in 名古屋  2012年1月28日 - 2012年1月28日