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

Edited by: Kazutaka Mannen, Diana Roman, Graham Leonard, Stephanie Prejean, Mitsuhiro Nakagawa

Hakone volcano, located 100 km west of Tokyo, Japan, is a hot spring resort area and one of the most popular tourism destinations in the country, with over 20 million visitors every year from all around the world. Although there is no historical record of eruption prior to 2015, frequent and intense earthquake swarms have occurred beneath the volcano. The 2015 eruption was a small phreatic eruption and only 100 tons of fine ash was released. However, precursory unrest began two months before the eruption and the entire precursory sequence was monitored in detail using densely distributed seismic and geodetic instruments. This special issue aims to compile multidisciplinary observations and understanding of this eruption and volcanic system and similar volcanoes worldwide to provide a basis for volcano monitoring and hazard mitigation in hydrothermal-prone volcanoes.

  1. Content type: Full paper

    Although the 2015 Hakone Volcano eruption was a small-scale phreatic eruption with a discharged mass of only about 100 tons, interferometric synthetic aperture radar successfully detected surface deformations ...

    Authors: Ryosuke Doke, Masatake Harada, Kazutaka Mannen, Kazuhiro Itadera and Jun Takenaka

    Citation: Earth, Planets and Space 2018 70:63

    Published on:

  2. Content type: Full paper

    In the present study, we analyze the seismic signals from a continuous volcanic tremor that occurred during a small phreatic eruption of the Hakone volcano, in the Owakudani geothermal region of central Japan,...

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

    Citation: Earth, Planets and Space 2017 69:164

    Published on: