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Towards forecasting phreatic eruptions: Examples from Hakone volcano and some global equivalents

ContentsSpecial issue “Towards forecasting phreatic eruptions: Examples from Hakone volcano and some global equivalents”

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Kazutaka Mannen, Diana Roman, Graham Leonard, Stephanie Prejean and Mitsuhiro Nakagawa 1Understanding and forecasting phreatic eruptions driven by magmatic degassing

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . John Stix and J. Maarten de Moor 7Pyroclastic density currents associated with the 2015 phreatomagmatic eruption of the Kuchinoerabujima volcano

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nobuo Geshi and Jun’ichi Itoh 7Analyzing the continuous volcanic tremors detected during the 2015 phreatic eruption of the Hakone volcano

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yohei Yukutake, Ryou Honda, Masatake Harada, Ryosuke Doke, Tatsuhiko Saito, Tomotake Ueno, Shin’ichi Sakai and Yuichi Morita 8

Phreatic eruptions and deformation of Ioto Island (Iwo-jima), Japan, triggered by deep magma injection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hideki Ueda, Masashi Nagai and Toshikazu Tanada 8

InSAR analysis for detecting the route of hydrothermal !uid to the surface during the 2015 phreatic eruption of Hakone Volcano, Japan . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ryosuke Doke, Masatake Harada, Kazutaka Mannen, Kazuhiro Itadera and Jun Takenaka 9

Chronology of the 2015 eruption of Hakone volcano, Japan: geological background, mechanism of volcanic unrest and disaster mitigation measures during the crisis. . . . . . . . . . . . . . . . . . . . . . . . Kazutaka Mannen, Yohei Yukutake, George Kikugawa, Masatake Harada, Kazuhiro Itadera and Jun Takenaka 9

Contention between supply of hydrothermal !uid and conduit obstruction: inferences from numerical simulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ryo Tanaka, Takeshi Hashimoto, Nobuo Matsushima and Tsuneo Ishido 10

Lahar characteristics as a function of triggering mechanism at a seasonally snow-clad volcano: contrasting lahars following the 2014 phreatic eruption of Ontake Volcano, Japan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Kyoko S. Kataoka, Takane Matsumoto, Takeshi Saito, Katsuhisa Kawashima, Yoshitaka Nagahashi,

Tsutomu Iyobe, Akihiko Sasaki and Keisuke Suzuki 10Precursory tilt changes associated with a phreatic eruption of the Hakone volcano and the corresponding source model

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ryou Honda, Yohei Yukutake, Yuichi Morita, Shin’ichi Sakai, Kazuhiro Itadera and Kazuya Kokubo 11Anatomy of phreatic eruptions . . . . . . . . . . . . . . . Corentin Caudron, Benoit Taisne, Jurgen Neuberg, Arthur D. Jolly, Bruce Christenson,

Thomas Lecocq, Suparjan, Devy Syahbana and Gede Suantika 11Relating gas ascent to eruption triggering for the April 27, 2016, White Island (Whakaari), New Zealand eruption

sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Arthur Jolly, Ivan Lokmer, Bruce Christenson and Johannes Thun 12Geophysical examination of the 27 April 2016 Whakaari/White Island, New Zealand, eruption and its implications for

vent physiognomies and eruptive dynamics . . . . . . . . . . . . . . . . . . . . . Braden Walsh, Jonathan Procter, Ivan Lokmer, Johannes Thun, Tony Hurst, Bruce Christenson and Arthur Jolly 12

Phreatic eruption dynamics derived from deposit analysis: a case study from a small, phreatic eruption from Whakāri/White Island, New Zealand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Geo# Kilgour, Stephanie Gates, Ben Kennedy, Aaron Farquhar, Ame McSporran and Cameron Asher 13

Time variations in the chemical and isotopic composition of fumarolic gases at Hakone volcano, Honshu Island, Japan, over the earthquake swarm and eruption in 2015, interpreted by magma sealing model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Takeshi Ohba, Muga Yaguchi, Kana Nishino, Nozomi Numanami, Yasushi Daita,

Chiho Sukigara, Masanori Ito and Urumu Tsunogai 13Infrasonic wave accompanying a crack opening during the 2015 Hakone eruption

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Yohei Yukutake, Mie Ichihara and Ryou Honda 14Resistivity characterisation of Hakone volcano, Central Japan, by three-dimensional magnetotelluric inversion

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ryokei Yoshimura, Yasuo Ogawa, Yohei Yukutake, Wataru Kanda, Shogo Komori, Hideaki Hase, Tada-nori Goto, Ryou Honda, Masatake Harada, Tomoya Yamazaki, Masato Kamo, Shingo Kawasaki,

Tetsuya Higa, Takeshi Suzuki, Yojiro Yasuda, Masanori Tani and Yoshiya Usui 14Temporal changes in in!ation sources during the 2015 unrest and eruption of Hakone volcano, Japan

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Masatake Harada, Ryosuke Doke, Kazutaka Mannen, Kazuhiro Itadera and Mikio Satomura 15Monitoring ground deformation of eruption center by ground-based interferometric synthetic aperture radar (GB-InSAR):

a case study during the 2015 phreatic eruption of Hakone volcano. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Senro Kuraoka, Yuichi Nakashima, Ryosuke Doke and Kazutaka Mannen 15

Experimental approach to rootless eruptions using kitchen materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rina Noguchi, Ai Hamada, Ayako I. Suzuki and Kei Kurita 16

Suspended sediment transport diversity in river catchments following the 2014 phreatic eruption at Ontake Volcano, Japan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Kyoko S. Kataoka, Takane Matsumoto, Takeshi Saito, Yoshitaka Nagahashi and Tsutomu Iyobe 16

Cover image: Stix, J. et al., Earth, Planets and Space 2018, 70:83 DOI:10.1186/s40623-018-0855-z

Page 6 of 6Mannen et al. Earth, Planets and Space (2019) 71:91

Yukutake Y, Ito H, Honda R et al (2011) Fluid-induced swarm earthquake sequence revealed by precisely determined hypocenters and focal mech-anisms in the 2009 activity at Hakone volcano, Japan. J Geophys Res Solid Earth 116:B04308. 63 0800B J0102/9201.01/gro.iod//: sptth

Yukutake Y, Honda R, Harada M et al (2017) Analyzing the continuous volcanic tremors detected during the 2015 phreatic eruption of the Hakone volcano. Earth Planets Space 69:164. 2604s/6811.01/gro.iod//: sptth3-017-0751-y

Yukutake Y, Ichihara M, Honda R (2018) Infrasonic wave accompanying a crack opening during the 2015 Hakone eruption. Earth Planets Space 70:53.

x-0280-810-3 2604s/6811.01/gro.iod//: sptth

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E"ect of Surface Geology on Seismic Motion: Challenges of Applying Ground Motion Simulation to Seismology and Earthquake Engineering