Papers - KUMAGAI Hiroyuki
-
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
-
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
-
Nakano, M; Kumagai, H; Taguchi, K
GEOPHYSICAL JOURNAL INTERNATIONAL Vol. 240 ( 3 ) page： 1622 - 1638 2025.1
-
Mori, A; Kumagai, H
GEOPHYSICAL JOURNAL INTERNATIONAL Vol. 240 ( 1 ) page： 46 - 60 2024.11
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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