最近の主な発表内容(2007-2017)
2017
高田亮 火山周辺で起こる諸現象のアナログ実験:斜面不安定,地殻変動,断層や津波, 2017連合大会
高田亮 1883年Krakatau噴火のレビュウ:噴火前兆DBから, 2017連合大会
2016
高田亮,山元孝広,石塚吉浩,中野俊(2016)割れ目噴火と岩脈から見た富士火山の噴火様式, 2016火山学会秋季大会
高田亮 (2016) 「地震と火山活動」第3回研究会(蔵王): Volcanic Activity of Fuji Volcano, and the adjacent earthquakes: Effects of stress change on dormant volcanoes (富士火山の火山活動と周辺の地震について-- 応力場の変化が休眠中の火山に与える影響 ----)
高田亮 (2016) 応力場の変化が休眠中の火山へ与える影響 2016連合大会
2015
Takada, A., How can dykes contribute volcano growth and eruption under the stress field?  ILP35, Potsdam
Kiyoshi Toshidaa, Akira Takadab, and Takashi Kitsukawa (2015) Age of Samalas-Rinjani and older pre-caldera volcanoes in Lombok, Sunda arc, JPGU.
Akira Takada, Takahiro Yamamoto, Nugraha Kartadinata, Agus Budianto, Arif Munandar, Akikazu Matsumoto, Shigeru Suto (2015) Eruptive history and magma plumbing system of Tambora volcano, Indonesia, Tambora 火山噴火200周年記念WS
高田亮(2015) 富士山噴火シナリオ構築のための噴火様式分岐の条件,ERI発表会
高田亮(2015)岩脈を使ったマグマの上昇・噴火機構のレビュー-大工は家を造る,ダイク(岩脈)は火山を造れるか?- 産総研退職記念談話会
2014
高田亮 (2014) アウトリーチのためのゼラチンを使ったマグマの上昇・噴火実験, 2014連合大会
高田亮 (2014) 割れ目噴火から見た富士山の噴火史と浅部マグマ供給系,新学術領域研究「地殻流体:その実態と沈み込み変動への役割」地球惑星連合大会 夜間集会
高田亮 (2014) 富士火山研究のまとめと今後の展望:割れ目噴火からみた富士山の進化,東工大セミナー
高田亮 (2014) 富士火山基礎研究ワークショップ.過去10,000年間の割れ目噴火の時間変化から見た富士火山の進化:噴火シナリオ構築への準備, ERI発表会
高田亮(2014) 応力場の変化がマグマ上昇に与える影響:力学的モデルと海外の噴火事例,巨大地震と火山活動WS(第1回)
Toshida K, Takada A et al (2014) Somma formation history of Tengger-Bromo caldera volcano, East Java, Sunda arc, COV8,
Takada A, Furukawa R, Oikawa T., Yamazaki S (2014)  Analog experiments on magma ascent and eruption for outreach program, COV8

2013 
Akira Takada, Ryuta Furukawa, Kiyoshi Toshida, S Andreastuti, N Kartadinata (2013) Hazard mitigation of a caldera-forming eruption: From past experience in Indonesia to modern society? 2013連合大会
高田亮,古川竜太,及川輝樹,西来邦章,山崎誠子,廣田明成 (2013) シースルー火山学  爆発的噴火バージョン 2013連合大会

2012
高田亮 (2012) 割れ目噴火から見た富士山の噴火史と浅部マグマ供給系,新学術領域研究「地殻流体:その実態と沈み込み変動への役割」富士火山基礎研究ワークショップ.
土志田 潔,竹内晋吾,高田亮, Heriwaseso,A ,Mulyana,R ,Nursalim, A(2012)インドネシア,テンガルーカルデラ火山における巨大な火山体の形成時期,日本火山学会秋季大会.
土志田 潔,竹内晋吾,高田亮, Heriwaseso,A ,Mulyana,R ,Nursalim, A(2012)インドネシア,テンガルーカルデラ火山地域における第二次(サンドシー)カルデラ噴火の発生時期の決定,日本地質学会.
Furukawa, R., Takada, A., Toshida, K., S.Andreastuti, E Kadarsetia, N.Kartadinata, A.Heriwaseso, O.Prambada, Y. Wahyudi, Y. Wahyudi ,N Firmansya(2012) Explosive eruptions associated with Batur and Bratan calderas, Bali, Indonesia. JpGU meeting 2012.
Toshida,K.,, Shingo, t., Furukawa, R., Takada, A., Andreastuti, S., Kartadinata, N., Heriwaseso, A., Prambada, O., Mulyana, R., ANursalim, A. (2012) Comparing Long-term variation of pre-caldera volcanic activity in Bali and in Tenggar caldera region, East Java. ,JpGU meeting 2012. 
A Takada, R Furukawa, K Toshida, S Andreastuti, N Kartadinata (2012) Characteristics of a caldera volcano, and process to a caldera-forming eruption in Indonesia,JpGU meeting 2012.
高田亮(2012) 街角火山学:火山に類似した現象を探せ. 日本地球惑星科学連合2011年大会 G-02 地球惑星科学のアウトリーチ.
Takada, A., Furukawa, R. Toshida, K., S.Andreastuti, N.Kartadinata (2012) Geological Evaluation of Explosive eruptions associated with Batur and Bratan calderas, Bali, Indonesia. International Workshop on Multi-disciplinary Hazard Reduction from Earthquakes and Volcanoes in Indonesia. アジア太平洋大規模地震火山災害リスク対策ワークショップ.
Furukawa, R., Takada, A., Toshida, K., S.Andreastuti, E Kadarsetia, N.Kartadinata, A.Heriwaseso, O.Prambada, Y. Wahyudi, Y. Wahyudi ,N Firmansya(2011) Explosive eruptions associated with Batur and Bratan calderas, Bali, Indonesia. International Workshop on Multi-disciplinary Hazard Reduction from Earthquakes and Volcanoes in Indonesia. アジア太平洋大規模地震火山災害リスク対策ワークショップ.
KiyoshiToshida, Shingo Takeuchi, Ryuta Furukawa, Akira Takada, Supriyati Andreastuti, Nugraha Kartadinata, Anjar Heriwaseso,R Mulyana,A Nursalim (2012) Long-term variation of pre-caldera volcanic activity in Bali and East Java
Geological evaluation of frequency and process of caldera-forming eruptions in Sunda arc, Indonesia. International Workshop on Multi-disciplinary Hazard Reduction from Earthquakes and Volcanoes in Indonesia. アジア太平洋大規模地震火山災害リスク対策ワークショップ.

2011
Takada, A., Furukawa, R. Toshida, K., S.Andreastuti, N.Kartadinata (2011) Geological Evaluation of Explosive eruptions associated with Batur and Bratan calderas, Bali, Indonesia. International Workshop on Multi-disciplinary Hazard Reduction from Earthquakes and Volcanoes in Indonesia. 
Furukawa, R., Takada, A., Toshida, K., S.Andreastuti, N.Kartadinata, E Kadarsetia, A.Heriwaseso, O.Prambada, Y. Wahyudi, Y. Wahyudi (2011) Explosive eruptions associated with Batur and Bratan calderas, Bali, Indonesia. International Workshop on Multi-disciplinary Hazard Reduction from Earthquakes and Volcanoes in Indonesia. 
KiyoshiToshida, Shingo Takeuchi, Ryuta Furukawa, Akira Takada, Supriyati Andreastuti, Nugraha Kartadinata, Anjar Heriwaseso,R Mulyana,A Nursalim (2011) Long-term variation of pre-caldera volcanic activity in Bali and East Java
Geological evaluation of frequency and process of caldera-forming eruptions in Sunda arc, Indonesia. International Workshop on Multi-disciplinary Hazard Reduction from Earthquakes and Volcanoes in Indonesia. 


土志田 潔,竹内晋吾,古川竜太,高田亮, 飯田高広,奥澤康一(2011)大規模火砕噴火に至る火山活動の長期変化 - インドネシア、スンダ弧のカルデラ火山地域における比較 - 日本火山学会秋季大会 

土志田 潔,竹内晋吾,古川竜太,高田亮, Supriyati Andreastuti, Nugraha Kartadinata, Anjar Heriwaseso,
Oktory Prambada (2011) インドネシアスンダ弧のカルデラ火山地域における先カルデラ活動の長期変化.日本地質学会

Takada, T.Yamamoto, Y. Ishizuka, and S. Nakano (2011) The fissure eruptions of Fuji Volcano, Japan, during the last 2,300 years. XXV IUGG GENERAL ASSEMBLY 2011, Melbourne, Australia. 
KiyoshiToshida, Shingo Takeuchi, Ryuta Furukawa, Akira Takada, Supriyati Andreastuti, Nugraha Kartadinata, Anjar Heriwaseso
, Oktory Prambada .Determination of long-term distribution of volcanic activity around calderas in Bali and East Java, Sunda Arc, Indonesia, based on K-Ar dating. XXV IUGG GENERAL ASSEMBLY 2011, Melbourne, Australia.

高田亮,山元孝広,石塚吉浩,中野俊(2011)過去2300年間の富士火山の割れ目噴火:噴火割れ目と噴火様式の特徴
日本地球惑星科学連合2011年大会  S-VC51火山とテクトニクス
高田 亮 (2011) 砂遊びから学ぶ箱庭火山学
日本地球惑星科学連合2011年大会 G-SC22 地球惑星科学のアウトリーチ
土志田 潔,竹内晋吾,古川竜太,高田亮,Supriyati Andreastuti,Nugraha Kartadinata,Anjar Heriwaseso,Oktory Prambada (2011) カリウム-アルゴン年代に基づくスンダ弧バリ・東部ジャワのカルデラ火山地域における火山活動の長期時空間分布の検討 日本地球惑星科学連合2011年大会

2010
高田 亮 (2010) インドネシア・スンダ弧におけるカルデラ噴火とカルデラ火山の特徴
A. Takada (2010) Caldera-forming eruptions, and characteristics of the caldera volcano in the Sunda Arc, Indonesia 地質学雑誌,116,473-783.
Documents on historical caldera-forming eruptions in Indonesia are compiled in order to find precursory events just before the caldera-forming eruption, and consider the characteristic eruptive history before the caldera forming eruption. Small-intermediate scale eruptions preceded a few months before the climax eruption. The distribution area of eruption sites, or humarole sites expands within a few to several km during the precursor period. After the high long-term eruption rate continued for around 100 ky, the characteristic change during the last 10,000-5,000 years appeared: (1) a decrease of the long-term eruption rate, (2) an increase of explosive eruption events, and (3) migration or restriction of the distribution area of eruption sites on the volcano flank. As the pre-caldera volcano edifice is larger, the consequent caldera tends to be larger. Finally, the variation of caldera is discussed.

Takada (2010) Magma partitioning into intrusion and eruption: comparison between analog experiments and observations. 6th International Dyke Conference, Varanasi, India, Abstracts, 159.
Some part of the produced magma intrudes into the crust to contribute the growth of the crust: the other erupts. Such magma partitioning is important for the evolution of the earth as well as that of a volcano. The volume ratio of erupted magma to supplied magma depends of the density difference between magma and crust, and the stress condition. These factors change with time, so that the ratio varies with time.
Magma is transported through a dyke (Anderson, 1951). In order to discuss magma partitioning based on the dyke theory, the stress effect should be added to the LNB theory (e.g., Ryan, 1987; Lister and Kerr, 1991).
First, I discuss what kind of factors can govern the ratio. Especially, I focus on the effect of stress, using the results of gelatin experiments. The gelatin experiment is useful to discuss stress effects (e.g., Fiske and Jackson, 1972; Takada, 1990). Simple fissure eruptions without volatile effects were investigated under various stress conditions. I prepared a 20-cm high gelatin block in water container, and, from its bottom, injected silicon oil lighter than gelatin. The tensile stress was produced in gelatin block deformed by a jack (Takada, 2005). Fissure eruptions of silicon oil occurred from cracks in gelatin. The degree of tensile stress makes eruptive fissure longer, and the volume ratio of intrusion to magma supply lager. If compressive stress is superimposed in any direction, even an air-filled crack with large density difference cannot rise in gelatin.
Second, I compiled various examples of the ratio. The short-term ratio varies from zero at explosive eruption to one at magma degassing. The volatile content governs the degree of explosion. Even if magma erupts, magma in the lava lake causes drain back due to degassing. Degassing through a conduit built magma convection system without eruption (Kazahaya et al., 1994). On the other hand, the local compressive stress originated by previous dyke intrusions also controls the temporal variation of short-term magma partitioning in the volcanic edifice (Takada, 1994; 1999). The field observation is supported by the results of analog experiments. However, the long-term ratio depends on tectonic settings. The ratio of oceanic ridge is about 0.1. That of Hawaiian volcano is about 0.3 (Dvorak and Dzurisin, 1993). That of flood basalt amounts to more than 0.5. The case of Columbia River basalt has the ratio of 0.9. The failed rift is associated with the thick flood basalt sequence; on the other hand, in case of spreading rift, almost supplied magma intrudes to build the oceanic crust. The ratio decreases to about 0.1 under the tensile stress condition. Such field observation under rifting condition is supported by the results of analog experiments under tensile stress.

Kiyosugi, A. Takada, K. Tanaka, Y. Miyata, C. B. Connor, D. C. Roman (2010) Interaction of dyke and preexisting fracture suggested by laboratory experiments. 6th International Dyke Conference, Varanasi, India, Abstracts, 73.
Alignments or locations of volcanoes along faults, for example at Newberry Caldera, USA, Mt. St. Helens, USA, and Minakami-yama Volcano, Japan, sometimes suggest dyke intrusion into preexisting fractures and magma ascent through them. However, the issue of whether dykes can intrude preexisting cracks and expand them or not is controversial because the significant influence of the regional stress field on dyke orientation and the relatively low fracture strength of rock. A simple idea previously proposed indicates that if magma pressure is larger than normal stress to the preexisting fracture, a dyke can intrude into the fracture. Here we attempted to simulate this condition with analog experiments in gelatin and observations of phenomena caused by interaction between dykes and preexisting fractures.
As preparation for the experiments, an approximately 15 cm x 15 cm x 15 cm gelatin block was solidified and placed into a larger water-filled tank. The magnitude of horizontal (s1, s3) stress on the gelatin block was controlled with compression of two lateral laboratory jacks. The magnitude of vertical (s2) load on the gelatin was controlled with water level of the tank. A 6 cm deep vertical crack oriented perpendicular to the maximum horizontal compressive stress was created at the upper part of gelatin block. To avoid annealing of the precut by adhesion of gelatin, weak detergent solution was poured into the precut. An air crack was then intruded into the gelatin from the bottom of the tank to simulate dyke ascent. The internal pressure of the air crack was calculated from depth and the length of the crack.
Experimental results show that when the ascending air crack arrives at the precut fracture it can behave in two different ways. Either the air crack intruded into the precut and used it to pass to the surface or it did not intrude into the precut and ascended to the surface by making a new fracture parallel to the maximum horizontal compressive stress. These two behaviors depend on the internal pressure of the air crack and normal stress conditions in the block as suggested by previous studies of interaction between ascending dikes and regional stresses. Specifically, when the air pressure in the crack was higher enough than normal stress across the precut, the air crack intruded laterally and ascended in the precut but a small amount of air remained in the gelatin and slowly ascended vertically by making a new fracture concordant to the stress field. Furthermore, if the pressure in the remnant air crack increased enough during ascent, this air crack could intrude into the precut again. In contrast, if the remnant air crack could not achieve enough pressure, it ascended to the surface slowly by propagating a new fracture. These step-intrusions into the precut crack and slower ascent of remnant suggest the mechanism of orientation change of fissures in initial stage of real eruption, observed for example at Paricutin in 1943.

A.Takada (2010) Fracturing and Dyke in Gelatin. PicoSymposium Role of Analog Experiments in Earth Science, ERI, Univ. Tokyo (March 29, 2010).

2009
A. Takada (2009) Geological Evaluation of Frequency and Process of Caldera-forming Eruption Multi-disciplinary Hazard Reduction Program from Earthquakes and Volcanoes in Indonesia Kick-off Workshop
インドネシアのカルデラ噴火の地質学的評価に関するプロジェクトの内容を発表した.はじめに,カルデラ噴火の実例を紹介し,本プロジェクトの各テーマ(1)カルデラ噴火に至る過程,(2)カルデラ噴火の時空分布,(3)総合的な地質学的評価を説明した.
http://www.soi.asia/event/20090421-disastermng/pdf/group2.pdf

2008
Takada, T.Yamamoto, Y. Ishizuka, and S. Nakano (2008) Approach to evaluating the future volcanic activity from the eruptive history of Fuji Volcano, Japan, during the last 3,500 years. Indonesia,ASIAN INTERNATIONAL SYMPOSIUM ON MODELING OF VOLCANIC ERUPTION FOR VOLCANIC HAZARD ASSESSMENT, Bandung, 2008.116,473-783.
Introduction: A volcano sometimes changes its eruptive volume, vent, or style during its eruptive history. The temporal variation of cumulative eruptive volume, eruption site, eruptive style, and chemical composition of magma are good indicators to know the system of the evolving volcano for predicting its future activity. This paper proposes a geological approach to the volcanic hazard mitigation of Fuji Volcano, the based on the accurate eruptive history.
Fuji Volcano: Fuji Volcano, 3776m high, Central Japan, is the largest basaltic volcano in Japan, and characterized by (1) the variation of erupted volume and eruption intervals, and (2) the variation of eruption style. First, eruptions with the erupted volume of more than 1 km3 occurred several times during the last around 15 ky; on the other hand, the quiescence period with low volcanic activity occurred for Cal BC 6,000-3600, and for the period for the last 900 years except the 1707 Hoei eruption. This character makes it more difficult to predict the future activity. Second, there are various types of eruptions occurring in Fuji Volcano, such as plinian eruption, lava flow, and pyroclastic flow. This character also makes it more difficult to prepare the hazards map.
Studies of the Fuji Volcano: The first geological map was made by Tsuya (1968). Machida (1977) studied the tephrostratigraphy of Fuji Volcano. Detailed tephrographic studies of the summit and flank eruptions were reported by Miyaji (1988) and Uesugi (1990). However, the quantitative eruptive history was needed to evaluate volcanic activity. Recently, the method of 14C dating developed. Micro topography of Fuji Volcano using Light Detection and Ranging System was analyzed (Chiba et al., 2007). Using these new methods, Geological Survey of Japan carried out the detailed geological mapping (Yamamoto et al., 2005; Takada et al., 2007) and the trench survey on flank eruptions (Takada and Kobayashi, 2007; Ishizuka et al., 2007; Suzuki, et al., 2007; Nakano et al., 2007; Kobayashi et al., 2007).
Eruptive history: The age of Fuji Volcano is around 100,000 year old (Machida, 1977). After the quiescence period with low volcanic activity for Cal BC 6,000-3600, the volcanic activity became high to construct the present summit. The explosive eruptions on both the summit and flank became dominant during Cal BC 1500-Cal BC 1000. The collapse of the eastern flank surface caused Gotemba debris avalanche around Cal BC 1000 (Miyaji et al., 2004).  The several explosive eruptions occurred on the summit during Cal BC 1000-Cal BC 300. The last summit explosive eruption was followed only by flank eruptions during the last 2300 years. The frequency of flank eruption became high during the Cal AD 700-1000 (Takada et al., 2007). Almost their erupted volume ranges in 0,001-0,1 km3. Their fissure eruption sites are restricted within 13.5 km from the summit. Jogan eruption, one of large eruptions in Fuji Volcano, occurred on the northwestern foot in Cal AD 864-865 to effuse the Aokigahara lava flow, of which erupted volume amounts to be 1.4 km3 exceptionally (Takahashi et al., 2007). The dominant trend of the eruptive fissures is NW-SE, which is concordant to the axis of the regional maximum horizontal compressive principal stress. However, the eruptive fissures shifted its trend from NW-SE to NS during Cal AD 900-1100 (Yamamoto et al., 2005; Takada et al., 2007). The explosivity decreases with time during the period of AD 700 ? 1100. The height level of the fissure eruption site was up to 3500 m just beneath the summit crater bottom. Fumarolic activity was recorded in historical documents during the period (Koyama, 2007). The volcanic activity became low during Cal AD 1100-1700. The last eruption, the AD 1707 Hoei eruption, was plinian one on the southeastern flank. The erupted volume was estimated to be 0.7 DRE km3 (Miyaji, 1988).
What kind of model can explain the future activity?: The temporal variation of eruptive volume depends on the variation of magma supply as well as stress field. There are two different cases for the exceptional large volume eruptions. The 864-865 Jogan eruption occurred during the period of frequent fissure eruptions; the 1707 Hoei eruption occurred after the long quiescence period.  The temporal variation of eruption site is a good indicator of the change of the regional and local stress field, because a dike intrusion is controlled by the stress field (e.g., Takada, 1999); for example, the restriction of eruption sites within 13.5 km from the summit, the upward migration of flank fissure eruption sites, and the high frequency of fissure eruption during AD 700 ? 1100. A decrease in explosivity has relation to continuous fumarolic activity during AD 700 ? 1100. The magma pluming system beneath the volcano may have been stable open to allow degassing. This paper introduce the model of magma pluming system beneath Fuji Volcano controlled by the stress field, and discuss the future activity of the volcano.

2007
Takada, A. (2007) Activity of Fuji Volcano during the last 2000 years: Approach to volcanic hazard mitigation using its eruptive history. The 4th CCOP worksop for volcanic hazard mitiation in Philippines.
Fuji Volcano is the largest basaltic volcano in Japan, and characterized by (1) the variation of erupted volume and eruption intervals, and (2) the variation of eruption style. First, eruptions with the erupted volume of more than 1 km3 occurred several times during the last around 15 ky; on the other hand, the quiescence period with low volcanic activity occurred for Cal BC 6,000-3600, and for the period for the last 900 years except 1707 Hoei eruption. This character makes it more difficult to predict the future activity. Second, there are various types of eruptions occurring in Fuji Volcano, such as plinian eruption, lava flow, and pyroclastic flow. This character also makes it more difficult to prepare the Hazards map. Fuji Volcano has such a variation pattern of “rise and fall” in volcanic activity. The temporal variation of cumulative eruptive volume, eruption site, eruptive style, and chemical composition of magma are good indicators to know the pattern. This paper proposes a geological approach to the volcanic hazard mitigation of Fuji Volcano, understanding the pattern based on the eruptive history, as follows. Cal BC 200 summit scoria eruption was followed only by flank eruptions. The frequency of flank eruption became high during the Cal AD 700-1000 in any direction from the summit (Takada et al., 2007). Their fissure eruption sites are restricted within 13.5 km from the summit. Jogan eruption, one of huge eruptions in Fuji Volcano, occurred on the northwestern foot in Cal AD 864-865 to erupt the Aokigahara lava flow (Koyama, 2007). The total erupted volume amounts to be 1.4 km3 (Takahashi et al., 2007). The dominant trend of eruptive fissures is NW-SE, which is concordant to the axis of the regional maximum horizontal compressive principal stress. However, the eruptive fissures shifted its trend from NW-SE to NS during Cal AD 900-1100 (Takada et al., 2007). The explosivity decreases with time during the period of AD 700 ? 1100. The volcanic activity became low during Cal AD 1100-1700. The last eruption, the AD 1707 Hoei eruption, was plinian one on the southeastern flank. The erupted volume was estimated to be 0.7 DRE km3 (Miyaji, 1988).