Papers - KUMAGAI Hiroyuki
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A simple method to discriminate non-seismic pulses and long-period noise in broadband seismic records and its application to centroid moment tensor inversion of earthquakes in Colombia Reviewed International coauthorship
Viviana Dionicio, Hiroyuki Kumagai, Juan Carlos Bermudez, Esteban Poveda, Faustino Blanco, Masahiro Yoshimoto, Maeda Yuta, Orlando Chamorro, Patricia Pedraza, Indira Molina
Journal of South American Earth Sciences Vol. 157 2025.3
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Magmatic processes associated with the 2020 eruption of Taal Volcano, Philippines, revealed by local seismic source estimates Reviewed International coauthorship
Kumagai, H; Bornas, MA; Sevilla, WI; Lacson, RL Jr; Figueroa, MS II; Clarito, CJ; Mori, A; Hamamoto, M
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH Vol. 458 2025.2
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Nakano, M; Kumagai, H; Taguchi, K
GEOPHYSICAL JOURNAL INTERNATIONAL Vol. 240 ( 3 ) page： 1622 - 1638 2025.1
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Mori, A; Kumagai, H
GEOPHYSICAL JOURNAL INTERNATIONAL Vol. 240 ( 1 ) page： 46 - 60 2024.11
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Very-long-period seismicity associated with the 2009-2015 reawakening of Cotopaxi Volcano, Ecuador Reviewed International coauthorship
Molina, I; Kumagai, H; Ruiz, M; Hernández, S; Mothes, P; Arias, G; Andújar, J
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH Vol. 453 2024.9
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1999 年伊豆大島における人工地震探査 ─観測および初動走時データによる 3 次元地震波速度構造─
渡辺秀文, 鍵山恒臣, 坂下至功, 及川 純, 大湊隆雄, 小山悦郎, 辻 浩, 宗包浩志, 松下誠司, 萩原道徳, 竹田豊太郎, 長田 昇, 井本良子, 青山 裕, 浜田盛久, 趙 燕来, Mossa Hesham, 福満修一郎, 青木重樹, 藤原健治, 池田 靖, 加治屋秋実, 安藤 忍, 亀井 守, 古田雅和, 浅沼光輝, 佐藤勝良, 山賀一章, 石脇 誠, 広瀬淳司, 干場三寛, 福田 直, 坂 勝仁, 森 済, 勝俣 啓, 前川徳光, 岡田 弘, 田中 聡, 山脇輝夫, 仁田交市, 橋野弘憲, 野津憲治, Pedro A. Hernandez, 下池洋一, R. Noemi Lima, 野上健治, 平林順一, 鈴木 隆, 熊谷博之, 他19名
地震研究所彙報 Vol. 98 page： 1 - 29 2023.10
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Temporal evolution of the magmatic system at Nevado del Ruiz Volcano (Colombia) inferred from long-period seismic events in 2003-2020 Reviewed International coauthorship
Solórzano, LM; Molina, I; Kumagai, H; Taguchi, K; Torres, R; Cano, LCG; López, CM
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH Vol. 438 2023.6
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Topographic Degradation Processes of Lunar Crater Walls Inferred From Boulder Falls Reviewed
Ikeda Ayame, Kumagai Hiroyuki, Morota Tomokatsu
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS Vol. 127 ( 10 ) 2022.10
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Plume height, duration and volume of sustained explosive eruptions inferred from eruption tremor amplitudes International coauthorship
Mori Azusa, Kumagai Hiroyuki, Londono John Makario
GEOPHYSICAL JOURNAL INTERNATIONAL Vol. 231 ( 2 ) page： 1045 - 1056 2022.7
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Source models of long-period seismic events at Galeras volcano, Colombia Reviewed International coauthorship
Torres Roberto, Kumagai Hiroyuki, Taguchi Kimiko
GEOPHYSICAL JOURNAL INTERNATIONAL Vol. 227 ( 3 ) page： 2137 - 2155 2021.12
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コロンビアにおける地震・津波・火山災害の軽減に向けた日本の貢献 Invited
熊谷博之
地震ジャーナル Vol. 71 page： 41 - 47 2021.6
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Overview of the January 2020 Eruptions at Taal Volcano (Philippines) and Related Disaster-mitigation Response Reviewed
BULLETIN OF THE VOLCANOLOGICAL SOCIETY OF JAPAN Vol. 66 ( 1 ) page： 45 - 53 2021.3
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Empirical formula for the quality factors of crack resonances and its application to the estimation of source properties of long-period seismic events at active volcanoes Reviewed International coauthorship
Kimiko Taguchi, Hiroyuki Kumagai, Yuta Maeda, and Roberto Torres
GEOPHYSICAL JOURNAL INTERNATIONAL Vol. 224 page： 2131 - 2148 2021.1
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Temporal change of the magma plumbing system at Galeras volcano, Colombia, revealed by repeated seismic tomography in 2009-2018
Makario Londono John, Kumagai Hiroyuki, Torres Roberto
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH Vol. 406 2020.11
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Scattering and Attenuation Characteristics at Volcanoes Inferred From Envelope Widths of Natural and Active Seismic Sources
Kumagai Hiroyuki, Torres Roberto, Maeda Yuta
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH Vol. 125 ( 11 ) 2020.11
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Repeating Earthquakes Along the Colombian Subduction Zone
Bermudez-Barrios Juan Carlos, Kumagai Hiroyuki
JOURNAL OF DISASTER RESEARCH Vol. 15 ( 5 ) page： 645 - 654 2020.8
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Estimating plume heights of explosive eruptions using high-frequency seismic amplitudes
Mori Azusa, Kumagai Hiroyuki
GEOPHYSICAL JOURNAL INTERNATIONAL Vol. 219 ( 2 ) page： 1365 - 1376 2019.11
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Amplitude Source Location Method With Depth-Dependent Scattering and Attenuation Structures: Application at Nevado del Ruiz Volcano, Colombia
Kumagai Hiroyuki, Makario Londono John, Maeda Yuta, Acevedo Rivas Alvaro Esteban
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH Vol. 124 ( 11 ) page： 11585 - 11600 2019.11
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Envelope Widths of Volcano-Seismic Events and Seismic Scattering Characteristics Beneath Volcanoes Reviewed
Kumagai Hiroyuki, Makario Londono John, Maeda Yuta, Lopez Velez Cristian Mauricio, Lacson Rudy Jr.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH Vol. 123 ( 11 ) page： 9764-9777 2018.11
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Source Properties and Triggering Processes of Long-Period Events Beneath Volcanoes Inferred From an Analytical Formula for Crack Resonance Frequencies Reviewed
Taguchi Kimiko, Kumagai Hiroyuki, Maeda Yuta, Torres Roberto
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH Vol. 123 ( 9 ) page： 7550-7565 2018.9
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4D seismic tomography of Nevado del Ruiz Volcano, Colombia, 2000-2016 Reviewed
Makario Londono John, Kumagai Hiroyuki
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH Vol. 358 page： 105-123 2018.6
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Theoretical basis of the amplitude source location method for volcano-seismic signals Reviewed
Morioka Hanae, Kumagai Hiroyuki, Maeda Takuto
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH Vol. 122 ( 8 ) page： 6538-6551 2017.8
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Depth-dependent rupture mode along the Ecuador-Colombia subduction zone Reviewed
Yoshimoto Masahiro, Kumagai Hiroyuki, Acero Wilson, Ponce Gabriela, Vasconez Freddy, Arrais Santiago, Ruiz Mario, Alvarado Alexandra, Pedraza Garcia Patricia, Dionicio Viviana, Chamorro Orlando, Maeda Yuta, Nakano Masaru
GEOPHYSICAL RESEARCH LETTERS Vol. 44 ( 5 ) page： 2203-2210 2017.3
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A generalized equation for the resonance frequencies of a fluid-filled crack Reviewed
Maeda, Y. and H. Kumagai
Geophys. J. Int. Vol. 209 page： 192-201 2017.1
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Near-field tsunami forecast system based on near real-time seismic moment tensor estimation in the regions of Indonesia, the Philippines, and Chile Reviewed
Inazu, D., N. Pulido, E.Fukuyama, T.Saito, J. Senda, and H. Kumagai
Earth Planets Space Vol. 68:73 2016.5
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Discriminating non-seismic long-period pulses and noise to improve earthquake source inversion Reviewed
Sakai, T., H. Kumagai, N. Pulido, J. Bonita, and M. Nakano
Earth Planets Space Vol. 68:50 2016.4
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On volume-source representations based on the representation theorem Invited Reviewed
Ichihara, M.,T. Kusakabe, N. Kame, and H. Kumagai
Earth Planets Space Vol. 68:14 2016.1
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表現定理とグリーン関数（2）─体積震源のモーメントテンソル表現─ Reviewed
日下部哲也, 亀伸樹, 市原美恵, 熊谷博之
地震第2輯 Vol. 68 page： 169-176 2016
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An approach to source characterization of tremor signals associated with eruptions and lahars Invited Reviewed
Kumagai, H., P. Mothes, M. Ruiz, and Y. Maeda
Earth Planets Space Vol. 67:178 2015.11
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Performance of broadband seismic network of the Philippines Reviewed
Melosantos, A. A., K. V. C. Soriano, P. C. M. Alcones, J. U. Pantig, J. D. Bonita, I. C. Narag, H. Kumagai, and H. Inoue
J. Disast. Res. Vol. 10 page： 8-17 2015.2
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Regional moment tensor analysis in the Philippines: CMT solutions in 2012-2013 Reviewed
Bonita, J. D., H. Kumagai, M. Nakano
J. Disast. Res. Vol. 10 page： 25-34 2015.2
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Development and operation of a regional moment tensor analysis system in the Philippines: Contributions to the understanding of recent damaging earthquakes Reviewed
Punongbayan, B. J. T., H. Kumagai, N. Pulido, J. D. Bonita, M. Nakano, T. Yamashina, Y. Maeda, H. Inoue, A. A. Melosantos, M. F. Figueroa, P. C. M. Alcones, K. V. C. Soriano, I. C. Narag, and R. U. Solidum Jr.
J. Disast. Res. Vol. 10 page： 18-24 2015.2
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A phreatic explosion model inferred from a very long period seismic event at Mayon volcano, Philippines Reviewed
Maeda, Y., H. Kumagai, R. Lacson, M. S. Figueroa II, T. Yamashina, T. Ohkura, and A. V. Baloloy
J. Geophys. Res. Solid Earth Vol. 120 2015
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Shallow S wave attenuation and actively degassing magma beneath Taal Volcano, Philippines Reviewed
Kumagai, H., R. Lacson Jr., Y. Maeda, M. S. Figueroa II, and T. Yamashina
Geophys. Res. Lett. Vol. 41 2014.9
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Seismic moment and volume change of a spherical source Reviewed
Kumagai, H., Y. Maeda, M. Ichihara, N. Kame, T. Kusakabe
Earth Planets Space Vol. 66 page： doi:10.1186/1880-5981-66-7 2014.4
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An analytical formula for the longitudinal resonance frequencies of a fluid-filled crack Reviewed
Maeda, Y., and H. Kumagai
Geophys. Res. Lett. Vol. 40 page： doi:10.1002/grl.51002 2013.10
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Dynamic landslide processes revealed by broadband seismic records Reviewed
Yamada, M., H. Kumagai, Y. Matsushi, and T. Matsuzawa
Geophys. Res. Lett. Vol. 40 page： doi:10.1002/grl.50437 2013.6
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Source process of long-period seismic events at Taal volcano, Philippines: Vapor transportation and condensation in a shallow hydrothermal fissure Reviewed
Maeda, Y., H. Kumagai, R. Lacson, M. S. Figueroa II, and T. Yamashina
J. Geophys. Res. Vol. 118 page： doi:10.1002/jgrb.50205 2013.6
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Source amplitudes of volcano-seismic signals determined by the amplitude source location method as a quantitative measure of event size Reviewed
Kumagai, H., R. Lacson, Y. Maeda, M. S. Figueroa II, T. Yamashina, M. Ruiz, P. Palaciose, H. Ortiz, and H. Yepes
J. Volcanol. Geotherm. Res. Vol. 257 page： 57-71 2013.3
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Effects of water domains on seismic wavefields: A simulation case study at Taal volcano, Philippines Reviewed
Maeda, Y. and H. Kumagai
Earth Planets Space Vol. 65 page： 85-96 2013.3
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High-frequency source radiation during the 2011 Tohoku-Oki earthquake, Japan, inferred from KiK-net strong-motion seismograms Reviewed
Kumagai, H., N. Pulido, E. Fukuyama, and S. Aoi
J. Geophys. Res. Vol. 116 page： doi:10.1029/2012JB009670 2013.1
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Strong localized asperity of the 2011 Tohoku-Oki earthquake, Japan Reviewed
Kumagai, H., N. Pulido, E. Fukuyama, and S. Aoi
Earth Planets Space Vol. 64 page： 649-654 2012.8
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Very low frequency earthquakes along the Ryukyu subduction zone Reviewed
Ando, M., Y. Tu, H. Kumagai, Y. Yamanaka, and C. H. Lin
Geophys. Res. Lett. Vol. 39 page： L04303 2012.2
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Rupture process and coseismic deformations of the 27 February 2010 Maule Earthquake, Chile Reviewed
Pulido, N., Y. Yagi, H. Kumagai, and N. Nishimura
Earth Planets Space Vol. 63 page： 955–959 2011.12
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Characterization of scattered seismic wavefields simulated in heterogeneous media with topography Reviewed
Kumagai, H., T. Saito, G. O'Brien, and T. Yamashina
J. Geophys. Res. Vol. 116 page： B03308 2011.3
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Ascending seismic source during an explosive eruption at Tungurahua volcano, Ecuador Reviewed
Kumagai, H., P. Palacios, M. Ruiz, H. Yepes, and T. Kozono
Geophys. Res. Lett. Vol. 38 page： L01306 2011.1
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Detection of landslides and submarine slumps using broadband seismic networks Reviewed
Lin, C. H., H. Kumagai, M. Ando, and T. C. Shin
Geophys. Res. Lett. Vol. 37 page： L22309 2010.11
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Broadband seismic monitoring of active volcanoes using deterministic and stochastic approaches Reviewed
Kumagai, H., M. Nakano, T. Maeda, H. Yepes, P. Palacios, M. Ruiz, S. Arrais, M. Vaca, I. Molina, and T. Yamashina
J. Geophys. Res. Vol. 115 page： B08302 2010.8
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Centroid moment tensor catalogue for Indonesia Reviewed
Nakano, M. , T. Yamashina, H. Kumagai, H. Inoue, and Snarjo
Phys. Earth Plant. Inter. Vol. 183 page： 456-467 2010.2
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Source model of an earthquake doublet that occurred in a pull-apart basin along the Sumatran fault, Indonesia Reviewed
Nakano, M., H. Kumagai, S. Toda, R. Ando, T. Yamashina, H. Inoue, and Snarjo
Geophys. J. Int. Vol. 181 page： 141-153 2010.2
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Source mechanism of a very-long-period event at Mt Ontake, central Japan: Response of a hydrothermal system to magma intrusion beneath the summit Reviewed
Nakamichi, H., H. Kumagai, M. Nakano, M. Okubo, F. Kimata, Y. Ito, and K. Obara
J. Volcanol. Geotherm. Res. Vol. 187 page： 167-177 2009.9
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火山性地震の発生過程―定量化に関する最近の成果― Invited Reviewed
熊谷博之，中野優
地震 Vol. 61 page： S379-S390 2009.7
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Seismic tracking of lahars using tremor signals Reviewed
Kumagai, H., P. Palacios, T. Maeda, D. Barba Castillo, and M. Nakano
J. Volcanol. Geotherm. Res. Vol. 183 page： 112-121 2009.3
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Quantification of the sources of volcano-seismic signals Invited Reviewed
Kumagai, H.
Encyclopedia of Complexity and Systems Science page： 9899-9932 2009.3
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Waveform inversion in the frequency domain for the simultaneous determination of earthquake source mechanism and moment function Reviewed
Nakano, M., H. Kumagai, and H. Inoue
Geophys. J. Int. Vol. 173 page： 1000-1011 2008.6
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Source process of very-long-period events accompanying long-period signals at Cotopaxi Volcano, Ecuador Reviewed
Molina, I., H. Kumagai, A. Garcia-Aristizabal, M. Nakano, and P. Mothes
J. Volcanol. Geotherm. Res. Vol. 176 page： 119-133 2007.8
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Enhancing Volcano-Monitoring Capabilities in Ecuador Reviewed
Kumagai, H., H. Yepes, M. Vaca, V. Caceres, T. Nagai, K. Yokoe, T. Imai, K. Miyakawa, T. Yamashina, S. Arrais, F. Vasconez, E. Pinajota, C. Cisneros, C. Ramos, M. Paredes, L. Gomezjurado, A. Garcia-Aristizabal, I. Molina, P. Ramon, M. Segovia, P. Palacios, L. Troncoso, A. Alvarado, J. Aguilar, J. Pozo, W. Enriquez, P. Mothes, M. Hall, I. Inoue, M. Nakano, and H. Inoue
Eos trans. AGU Vol. 88 page： 245-246 2007.6
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Waveform inversion of volcano-seismic signals for an extended source Reviewed
Nakano, M., H. Kumagai, B. Chouet, and P. Dawson
J. Geophys. Res. Vol. 112 page： B02306 2007.2
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Seismic, petrologic, and geodetic analyses of the 1999 dome-forming eruption of Guagua Pichincha volcano, Ecuador Reviewed
Garcia-Aristizabal, A., H. Kumagai, P. Samaniego, P. Mothes, H. Yepes, and M. Monzier
J. Volcanol. Geotherm. Res. Vol. 161 page： 333-351 2007.1
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Source estimates of the May 2006 Java earthquake Reviewed
Nakano, M., H. Kumagai, K. Miyakawa, T. Yamashina, H. Inoue, M. Ishida, S. Aoi, N. Morikawa, and Pri Harjadi
Eos trans. AGU Vol. 87 page： 493-494 2006.11
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Temporal evolution of a magmatic dike system inferred from the complex frequencies of very-long-period seismic signals Reviewed
Kumagai, H.
J. Geophys. Res. Vol. 111 page： B06201 2006.6
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Vulucanian eruptions with dominant single force components observed at Asama volcano, Japan Reviewed
Ohminato, T., M. Takeo, H. Kumagai, T. Yamashina, J. Oikawa, E. Koyama, H. Tsuji, and T. Urabe
Earth Planets Space Vol. 58 page： 583-593 2006.5
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Response of a hydrothermal system to magmatic heat inferred from temporal variations in the complex frequencies of long-period events at Kusatsu-Shirane Volcano, Japan Reviewed
Nakano, M. and H. Kumagai
J. Volcanol. Geotherm. Res. Vol. 147 page： 203-396 2005.10
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Three-dimensional P-wave velocity structure of Tungurahua Volcano Reviewed
Molina, I., H. Kumagai, J.-L. Le Pennec, and M. Hall
J. Volcanol. Geotherm. Res. Vol. 147 page： 144-156 2005.10
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Waveform inversion of volcano-seismic signals assuming possible source geometries Reviewed
Nakano, M. and H. Kumagai
Geophys. Res. Lett Vol. 32 page： L12302 2005.6
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Source process of a long-period event at Kilauea Volcano Reviewed
Kumagai, H., B.A. Chouet, and P.B. Dawson
Geophys. J. Int. Vol. 161 page： 243-254 2005.2
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Resonances of a volcanic conduit triggered by repetitive injections of an ash-laden gas Reviewed
Molina, I., H. Kumagai, and H. Yepes
Geophys. Res. Lett. Vol. 31 page： L03603 2004.2
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Source mechanism of long-period events at Kusatsu-Shirane Volcano, Japan, inferred from waveform inversion of the effective excitation functions Reviewed
Nakano, M., H. Kumagai, and B.A. Chouet
J. Volcanol. Geotherm. Res. Vol. 122 page： 149-164 2003.4
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Magmatic dike resonances inferred from very-long-period seismic signals Reviewed
Kumagai, H., K. Miyakawa, H. Negishi, H. Inoue, K. Obara, and D. Suetsugu
Science Vol. 299 page： 2058-2061 2003.2
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Waveform inversion of oscillatory signatures in long-period events beneath volcanoes Reviewed
Kumagai, H., B.A. Chouet, and M. Nakano
J. Geophys. Res. Vol. 107 page： 2301 2002.11
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Temporal evolution of a hydrothermal system in Kusatsu-Shirane Volcano, Japan, inferred from the complex frequencies of long-period events Reviewed
Kumagai, H., B.A. Chouet, and M. Nakano
J. Geophys. Res. Vol. 107 page： 2236 2002.10
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The dependence of acoustic properties of a crack on the resonance mode and geometry Reviewed
Kumagai, H. and B.A. Chouet
Geophys. Res. Lett. Vol. 28 page： 3325-3328 2001.9
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Tomographic inversion of P-wave velocity and Q structures beneath the Kirishima volcanic complex, southern Japan, based on the finite-difference calculations of the complex travel times Reviewed
Tomatsu, T., H. Kumagai and P.B. Dawson
Geophys. J. Int. Vol. 146 page： 781-794 2001.9
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Very-long-period seismic signals and the caldera formation at Miyake Island, Japan Reviewed
Kumagai, H., T. Ohminato, M. Nakano, M. Ooi, A. Kubo, H. Inoue, and J. Oikawa
Science Vol. 293 page： 687-690 2001.7
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Autoregressive modeling of transfer functions in frequency domain to determine complex travel times Reviewed
Hasada, Y., H. Kumagai and M. Kumazawa
Earth Planets Space Vol. 53 page： 3-11 2001.1
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Acoustic properties of a crack containing magmatic or hydrothermal fluids Reviewed
Kumagai, H. and B.A. Chouet
J. Geophys. Res. Vol. 105 page： 25493-25512 2000.11
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A self-organized model of earthquakes with constant stress drops and the b-value of 1 Reviewed
Kumagai, H., Y. Fukao, S. Watanabe and Y. Baba
Geophys. Res. Lett. Vol. 26 page： 2817-2820 1999.9
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浜名湖周辺での東海沖の大地震に伴う津波堆積物の調査 Reviewed
熊谷博之
地学雑誌 Vol. 108 page： 424-432 1999.8
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Evidence for slow slip following a moderate-size earthquake (Mw=5.7) in a subducting plate Reviewed
Takai, K., H. Kumagai and N. Fujii
Geophys. Res. Lett. Vol. 26 page： 2113-2116 1999.7
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The excitation and characteristic frequency of the long-period volcanic event: an approach based on an inhomogeneous AR model of a linear dynamic system Reviewed
Nakano, M., H. Kumagai, M. Kumazawa, K. Yamaoka and B.A. Chouet
J. Geophys. Res. Vol. 103 page： 10031-10046 1999.5
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The complex frequencies of long-period seismic events as probes of fluid compositions beneath volcanoes Reviewed
Kumagai, H. and B.A. Chouet
Geophys. J. Int. Vol. 138 page： F7-F12 1999
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兵庫県南部地震（1995年1月17日）におけるGPS観測 Reviewed
加藤照之，John Patrick L. Catane，茶珎俊一，藤森邦夫，平原和朗，平田安廣，細善信，市川隆一，井口博夫，伊勢崎修弘，岩淵哲也，笠原稔，木股文昭，小竹美子，久保篤規，熊谷博之，他14名
測地学会誌 Vol. 43 page： 181-207 1997
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人工地震探査による霧島火山群の速度構造―波面法を用いた南北測線の初動走時データの解析― Reviewed
戸松稔貴，熊谷博之，国友孝洋，山岡耕春，渡辺了
火山 Vol. 42 page： 159-163 1997
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Reconstruction of a Tertiary fossil forest from the Canadian High Arctic using three-dimensional computer graphics Reviewed
Nobori, Y., K. Hayashi, H. Kumagai, S. Kojima, B. A. Lepage and T. Sweda
J. For. Plann. Vol. 3 page： 49-54 1997
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人工地震探査による霧島火山群の地震波速度構造―はぎとり法による解析― Reviewed
筒井智樹，鍵山恒臣，三ヶ田均，森田裕一，松島健，井口正人，及川純，山岡耕春，熊谷博之，他60名
火山 Vol. 41 page： 227-241 1996
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Time sequence and the recurrence models for large earthquakes along the Nankai trough revisited Reviewed
Kumagai, H.
Geophys. Res. Lett. Vol. 23 page： 1139-1142 1996
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Post-seismic crustal deformation associated with the 1995 Hyogo-ken Nanbu Earthquake derived from GPS observation -Preliminary analysis of Trimble data- Reviewed
Kato, T. Y. Kotake, S. Nakano, Y. Hirata, T. Chachin, F. Kimata, K. Yamaoka, T. Okuda, H. Kumagai, K. Hirahara, T. Nakano, T. Terashima, J.P.L. Catane, A. Kudo, T. Tabei, T. Iwabuchi and T. Matsushima
J. Phys. Earth Vol. 44 page： 287-299 1996
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GPS observation of post-seismic crustal movements in the focal region of the 1995 Hyogo-ken Nanbu earthquake -Static and real-time kinematic GPS observations- Reviewed
Hirahara K, T. Nakano, M. Kasahara, H. Takahashi, R.Ichikawa, S. Miura, T. Kato, S. Nakao, Y. Hirata, Y. Kotake, T. Chachin, F. Kimata, K. Yamaoka, T. Okuda, H. Kumagai, K. Nakamura, K. Fujimori, T. Yamamoto, T. Terashima, J.P.L. Catane, K. Tadokoro, A. Kudo, S. Otsuka, A. Tokuyama, T. Tabei, T. Iwabuchi and T. Matsushima
J. Phys. Earth Vol. 44 page： 301-315 1996
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Growth-ring analysis of Early Tertiary conifer woods from the Canadian High Arctic and its paleoclimatic interpretation Reviewed
Kumagai, H., T. Sweda, K. Hayashi, S. Kojima, J.F. Basinger, M.Shibuya and Y. Fukao
Palaeo. Palaeo. Palaeo. Vol. 116 page： 247-262 1995
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Reply to the comment by Yamaguchi and Grissino-Mayer Reviewed
Kumagai, H. and Y. Fukao
Geophys. Res. Lett. Vol. 20 page： 2281-2282 1993
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Resolving volcanic activity of 20 Ma ago with relative accuracy of 1 yr from tree rings of petrified woods Reviewed
Kumagai, H. and Y. Fukao
Geophys. Res. Lett. Vol. 19 page： 1859-1862 1992
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Structure of the D" layer inferred from the Earth's free oscillations Reviewed
Kumagai, H., Y. Fukao, N. Suda and N. Kobayashi
Phys. Earth Plant. Inter. Vol. 73 page： 38-52 1992