Miwa Takahiro

Profile Information

Affiliation: National Research Institute for Earth Science and Disaster Prevention

Degree: 博士(理学）(九州大学)

J-GLOBAL ID: 201301017859618970
researchmap Member ID: B000233750

Research Interests

Research Areas

Natural sciences / Solid earth science / Volcanology

Research History

Oct, 2024 - Present

National Research Institute for Earth Science and Disaster Prevention
Oct, 2016 - Present

National Research Institute for Earth Science and Disaster Prevention
Aug, 2016 - Present

National Institute of Advanced Industrial Science and Technology
May, 2014 - Sep, 2016

National Research Institute for Earth Science and Disaster Prevention
Apr, 2013 - Apr, 2014

Institute of Seimology and Volcanology, Kyushu University
Jan, 2011 - Mar, 2013

COE Fellow, Graduate School of Science Department of Geophysics, Tohoku University
Apr, 2010 - Dec, 2010

National Institute of Advanced Industrial Science and Technology

Education

Apr, 2007 - Mar, 2010

Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyushu University
Apr, 2005 - Mar, 2007

Department of Earth and Planetary Sciences, Graduate School of Sciences, Kyushu University
Apr, 2001 - Mar, 2005

Department of Earth Sciences, Faculty of Science, Kanazawa University

Committee Memberships

Jul, 2024 - Present

将来計画委員会委員, 日本火山学会
Nov, 2023 - Present

Chair of the 70th Anniversary Working Group, Volcanological Society of Japan
Oct, 2020 - Jun, 2024

大会委員会委員, 日本火山学会
Apr, 2016 - Jun, 2024

火山防災委員会委員, 日本火山学会
Apr, 2018 - Jun, 2022

編集委員会委員, 日本火山学会

Awards

Apr, 2014

Young researcher award, Volcanological Society of Japan

Papers

A Drift Pumice from the 2021 Eruption of Fukutoku-Oka-no-Ba Found in Koura Beach, Shimane Prefecture, San’in Region

Takahiro MIwa, Masashi Nagai

Report of the National Research Institute for Earth Science and Disaster Resilience, 89 1-8, Jan, 2025 Lead authorCorresponding author
The color systematics of volcanic ashfall samples in estimating eruption sequences: a case study of the 2017–2018 eruption at Shinmoe-dake, Kirishima volcano, Southwest Japan

Taketo Shimano, Yuki Suzuki, Atsushi Yasuda, Fukashi Maeno, Takahiro Miwa, Masashi Nagai, Setsuya Nakada, Michihiko Nakamura

Earth, Planets and Space, 76(1), Jul 31, 2024 Peer-reviewed
Classification of Volcanic Ash Particles with a Convolutional Neural Network on RGB Microphotographs: Towards Real-Time Monitoring of an Ongoing Eruption

Takahiro Miwa, Masashi Nagai, Hideki Ueda, Akihiko Yokoo

Report of the National Research Institute for Earth Science and Disaster Resilience, 88 1-7, Dec, 2023 Lead authorCorresponding author
Redox state of magma recorded in volcanic glass from an ash-forming eruption at Bromo volcano, Indonesia: Insights into the degassing process

Takahiro Miwa, Hidemi Ishibashi, Ryunosuke Kazahaya, Satoshi Okumura, Masato Iguchi, Genji Saito, Atsushi Yasuda, Nobuo Geshi, Hiroyuki Kagi

Bulletin of Volcanology, 85(9), Aug 15, 2023 Peer-reviewedLead authorCorresponding author
Laboratory Simulation of Earthquake-Induced Damage in Lava Dome Rocks

Lauren Schaefer, Jackie Kendrick, Yan Lavallée, Jenny Schauroth, Oliver Lamb, Lamur Anthony, Takahiro Miwa, Ben Kennedy

Tektonika, 1(1), May, 2023 Peer-reviewed
An Updated Scaling Relationship Between Energy and Crater Diameter for Surface and Subsurface Explosions

Takahiro Miwa, Masashi Nagai

Report of the National Research Institute for Earth Science and Disaster Resilience, 87 1-9, Dec, 2022 Lead author
Aging in magma rheology

Aika K. Kurokawa, Takahiro Miwa, Hidemi Ishibashi

Scientific Reports, 12(1), Dec, 2022 Peer-reviewed
Conduit Flow Dynamics During the 1986 Sub-Plinian Eruption at Izu-Oshima Volcano

Tomofumi Kozono, Hidemi Ishibashi, Satoshi Okumura, Takahiro Miwa

Journal of Disaster Research, 17(5) 754-767, Aug 1, 2022 Peer-reviewed
Eruptive dynamics and fragmentation mechanisms during cyclic Vulcanian activity at Sakurajima volcano (Japan): Insights from ash texture analysis

Pietro Gabellini, Raffaello Cioni, Nobuo Geshi, Marco Pistolesi, Takahiro Miwa, Giorgio Lacanna, Maurizio Ripepe

Journal of Volcanology and Geothermal Research, 428 107582-107582, Aug, 2022 Peer-reviewed
Transient conduit permeability controlled by a shift between compactant shear and dilatant rupture at Unzen volcano (Japan)

Yan Lavallée, Takahiro Miwa, James D. Ashworth, Paul A. Wallace, Jackie E. Kendrick, Rebecca Coats, Anthony Lamur, Adrian Hornby, Kai-Uwe Hess, Takeshi Matsushima …

Solid Earth, 13(5) 875-900, May 10, 2022 Peer-reviewed
Sedimentary System of Ash Deposits from Long-Term Vulcanian Activity at Sakurajima Volcano, Japan

Takahiro Miwa, Futoshi Nanayama

The Journal of Geology, 129(2) 171-182, May, 2021 Peer-reviewedLead authorCorresponding author
Automatic onsite imaging of volcanic ash particles with VOLCAT: Towards quasi-real-time eruption style monitoring

Takahiro Miwa, Nobuo Geshi, Jun'ichi Itoh, Toshikazu Tanada, Masato Iguchi

Journal of Volcanology and Geothermal Research, 416 107267-107267, Apr, 2021 Peer-reviewedLead authorCorresponding author
Physical and mechanical rock properties of a heterogeneous volcano: the case of Mount Unzen, Japan

Jackie E. Kendrick, Lauren N. Schaefer, Jenny Schauroth, Andrew F. Bell, Oliver D. Lamb, Anthony Lamur, Takahiro Miwa, Rebecca Coats, Yan Lavallée, Ben M. Kennedy

Solid Earth, 12(3) 633-664, Mar 16, 2021 Peer-reviewed
Magma Fracturing and Water Diffusion Model for the Mechanism of Phreatomagmatic Explosion Caused by High-viscosity Magmas

奥村聡, 三輪学央

Bulletin of Volcanological Society of Japan, 66(1) 35-43, Mar, 2021 Peer-reviewed
Decompression experiments for sulfur-bearing hydrous rhyolite magma: Redox evolution during magma decompression

Satoshi Okumura, Hidemi Ishibashi, Shoichi Itoh, Akimasa Suzumura, Yoshihiro Furukawa, Takahiro Miwa, Hiroyuki Kagi

American Mineralogist, 106(2) 216-225, Feb 1, 2021 Peer-reviewed
Sedimentation process of ashfall during a Vulcanian eruption as revealed by high-temporal-resolution grain size analysis and high-speed camera imaging

T. Miwa, Y. Iriyama, M. Nagai, F. Nanayama

Progress in Earth and Planetary Science, 7(1), Dec, 2020 Peer-reviewedLead authorCorresponding author
Gas flux cyclic regime at an open vent magmatic column inferred from seismic and acoustic records

Gen Kondo, Hiroshi Aoyama, Takeshi Nishimura, Maurizio Ripepe, Giorgio Lacanna, Riccardo Genco, Ryohei Kawaguchi, Taishi Yamada, Takahiro Miwa, Eisuke Fujita

Scientific Reports, 9(1), Dec, 2019 Peer-reviewed
Measurement of H2O Molecule and Hydroxyl Concentrations in Hydrous Rhyolitic Glass by UV–Vis–NIR Dispersive Microspectroscopy

Takahiro Miwa

Journal of Disaster Research, 14(5) 780-785, Aug 1, 2019 Peer-reviewedLead authorCorresponding author
Characteristics of tephra fall from eruptions at Sakurajima volcano, revealed by optical disdrometer measurements

Tomofumi Kozono, Masato Iguchi, Takahiro Miwa, Masayuki Maki, Takeshi Maesaka, Daisuke Miki

Bulletin of Volcanology, 81(7), Jul, 2019 Peer-reviewed
A Simple Procedure for Measuring Magma Rheology

Aika K. Kurokawa, Takahiro Miwa, Hidemi Ishibashi

Journal of Disaster Research, 14(4) 616-622, Jun 1, 2019 Peer-reviewed

Presentations

小笠原硫黄島翁浜沖2023年噴火の経緯と噴出物の特徴

長井雅史, 三輪, 学央, 中田, 節也, 角野, 浩史, 上田, 英樹, 安田, 敦, 小園, 誠史, 廣瀬, 郁, 南, 宏樹, 小林哲夫

May 31, 2024
ディスドロメータの降灰観測による桜島の火山灰連続放出のモニタリング

瀧下恒星, 小園, 誠史, 三輪, 学央, 井口正人

JpGU2024, May 31, 2024
Magma–water interaction during the 2022 shallow sea eruption at Ioto, Ogasawara, Japan

May 31, 2024
Interpreting deformation conditions from crystal-plasticity in extrusive lavas

Jackie E. Kendrick, Paul A. Wallace, Takahiro Miwa, Yan Lavallée

Apr 16, 2024
Experimental determination of a coefficient of restitution of rhyolitic melt

Takahiro Miwa, Aika K Kurokawa, Kyohei Sano, Satoshi Okumura, Kentaro Uesugi

Fall meeting of Volcanological Society of Japan, Oct 19, 2023
Estimation of total mass of tephra based on disdrometer observations

Kosei TAKISHITA, Tomofumi Kozono, Takahiro MIWA, Masato IGUCHI

Fall meeting of Volcanological Society of Japan, Oct 18, 2023
Shape parameter measurements of standard tephra samples via DIA in each particle

Kosei TAKISHITA, Takahiro MIWA, Masashi NAGAI, Setsuya NAKADA, Takehiko SUZUKI

Fall meeting of Volcanological Society of Japan, Oct 18, 2023
Magma pressurization in conduit prior to Vulcanian eruptions at Sakurajima volcano inferred from conduit flow modeling

T. Kozono, T. Nishimura, A. Matsumoto, M. Nakagawa, M. Iguchi, T. Miwa

Fall meeting of Volcanological Society of Japan, Oct 18, 2023
P-T condition of magma from the 2022 eruption at Ioto volcano, Ogasawara, Japan

Miwa T, Nagai M, Ueda H, Kozono T, Nakada S, Yasuda A

Fall meeting of Volcanological Society of Japan, Oct 18, 2023
Water content in solid–water system driving phreatic eruptions at Ioto volcano, Japan: Integration of geological and geophysical approaches

Takahiro Miwa, Aika K Kurokawa, Masashi Nagai, Tomofumi Kozono, Hideki Ueda, Toshikazu Tanada

IUGG2023, Jul 28, 2023
Water content in phreatic jet at Ioto volcano: Integration of geological and geophysical approaches

Takahiro Miwa, Aika K Kurokawa, Masashi Nagai, Tomofumi Kozono, Hideki Ueda, Toshikazu Tanada

JpGU2023, May 24, 2023
Development of the JVDN system (volcano observation data sharing system)

Hideki UEDA, Takashi HIROSE, Takanori MATSUZAWA, Takahiro MIWA, Masashi NAGAI, Yuhki KOHNO

JpGU2023, May 23, 2023
Comparison of redox states of volcanic glass and gas at Bromo volcano, Indonesia: Implications for the degassing process

Takahiro Miwa, Hidemi Ishibashi, Ryunosuke Kazahaya, Satoshi Okumura, Masato Iguchi, Genji Saito, Atsushi Yasuda, Nobuo Geshi, Hiroyuki Kagi

JpGU2023, May 23, 2023
Experimental constraint on redox evolution of magma during decompression

奥村聡, 石橋秀巳, 伊藤正一, 鈴村明政, 古川善博, 三輪学央, 鍵裕之

JpGU2021, Jun 5, 2021
Temporal variation of conduit process during the 2018 eruptive activity at Shinmoedake volcano, Japan: Implications from a time series of ash characteristics

Takahiro Miwa, Masashi Nagai, Hideki Ueda, Taku Ozawa, Eisuke Fujita

Jun 5, 2021
霧島新燃岳2018年噴火における火山灰構成物の時系列変化

三輪学央, 長井雅史

堆積物に基づく噴火物理化学パラメータ推定手法の高度化と事象分岐判断への活用, Feb, 2021
Laboratory Measurements of Damage Evolution in Dynamic Volcanic Environments: From Slow to Rapid Strain Events

L. N. Schaefer, B. M. Kennedy, J. E. Kendrick, Y. Lavallée, Takahiro Miwa

54th U.S. Rock Mechanics/Geomechanics Symposium, Jun 28, 2020
Redox state and nanolite crystallization of erupted magma during ash forming eruption at Bromo volcano, Indonesia

三輪学央, 石橋秀巳, 井口正人, 斎藤元治, 安田敦, 外西奈津美

Feb, 2020
火山噴火様式分岐に対する減圧結晶化過程の影響

三輪学央, 奥村聡, 小園誠史, 嶋野岳人

火山活動推移モデルの構築による火山噴火予測, Jan, 2020
Characteristics of tephra fall from eruptions at Sakurajima volcano, revealed by optical disdrometer measurements

Kozono, T, Iguchi, M, Miwa, T, Maki, M, Maesaka, T, Miki, D

AGU, Dec, 2019

Professional Memberships

Jun, 2024 - Present

日本地質学会
Jan, 2024 - Present

IAVCEI (International Association of Volcanology and Chemistry of the Earth's Interior)
Jul, 2020 - Present

Mineralogical Society of America
Aug, 2007 - Present

American Geophysical Union
Apr, 2005 - Present

日本地球惑星科学連合
Apr, 2005 - Present

Volcanological Society of Japan

Research Projects

高温状態にある火砕物の衝突ダイナミクス：火砕物の飛散範囲への影響

科学研究費助成事業, 基盤研究(C), 日本学術振興会, Apr, 2024 - Mar, 2027

三輪学央
火山灰のシステマティックス構築に基づく噴火推移と火道進化過程の関係解明研究

科学研究費助成事業基盤研究(B), 基盤研究(B), 日本学術振興会, Apr, 2020 - Mar, 2024

嶋野岳人, 野口里奈, 上木賢太, 井口正人, 桑谷立, 安田敦, 三輪学央
Analytical study of the product of volcanic eruption in terms of mathematical statistics for forecasting volcanic eruption sequence

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2017 - Mar, 2020

Taketo Shimano
Integrated study on the 2015 eruption at the Kuchinoerabujima volcano

Grants-in-Aid for Scientific Research Grant-in-Aid for Special Purposes, Grant-in-Aid for Special Purposes, Japan Society for the Promotion of Science, Jun, 2015 - Mar, 2016

Iguchi Masato, KANDA Wataru, MORI Toshiya, GESHI Nobuo, TANAKA Hiroshi, SEKIYA Naoya, KURI Miwa, SAKAMOTO Mayumi, HASHIMOTO Manabu, NAKAO Shigeru, Ohminato Takao, MAKI Norio, ICHIKO Taro, YAMADA Takashi, JITOZONO Takashi, TANADA Toshikazu, TAMEGURI Takeshi, NAKAMICHI Haruhisa, SUZUKI Yujoro, TAKARADA Shinji, MIKI Daisuke, NAKADA Setsuya, KOBAYASHI Tetsuo, YAMAMOTO Keigo, SHINOHARA Hiroshi, NOGAMI Kenji, OZAWA Taku, MIWA Takahiro, NAGAI Masashi, KOYAMA Takao, OHKURA Takahiro
Ash aggregation: Reconstruction from in situ observation of falling ash by using high-speed camera imaging.

Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B), Grant-in-Aid for Young Scientists (B), Japan Society for the Promotion of Science, Apr, 2014 - Mar, 2016

Miwa Takahiro
火山爆発強度の支配メカニズム～桜島ブルカノ式噴火のケーススタディ～

科学研究費助成事業特別研究員奨励費, 特別研究員奨励費, 日本学術振興会, 2008 - 2009

三輪学央

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Education

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