Japan Geoscience Union Meeting 2019

Presentation information

[J] Poster

S (Solid Earth Sciences ) » S-VC Volcanology

[S-VC35] Mitigation of volcanic disasters - basic and applied researches

Mon. May 27, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Shinji Takarada(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), Mitsuhiro Yoshimoto(Mount Fuji Research Institute, Yamanashi Prefectural Government), Yasuhiro Ishimine(Research and Education Center for Natural Hazards, Kagoshima University), Tomohiro Kubo(National Research Institute for Earth Science and Disaster Prevention)

[SVC35-P06] On the H2S concentration continuous observation at Kurikoma volcano

*Hideyuki Itoh1, Yasumichi Yamamoto2, Kenji OOba2, Morio Tsuji1, Takeshi Ohba3 (1.Faculty of policy studies, Iwate prefectural University, 2.JMS INc, 3.Tokai University)

Keywords:Kurikoma Volcano, H2S gas, continuous observation, climer care

urikoma volcano is active volcano located on junction of miyagi, akita, iwate prefectures. Phreatic explosion occurred in 1944 and 1744, it generated acid water descended on the iwai river triggered by phreatic explosion.

Active fumaroles can have been observed along the ohjigoku-dani valley and showa crater, especially, trails are maintained along ohjigoku-dani valley, and many climbers are exposed to volcanic gas.

We installed the environmental h2s sensors which called “odalog” (http://www.jmsystem.co.jp/kazan/odalog.html) in order to ascertain concentration of h2s along the trail and beside the showa crater during june, 6 to october, 3, 2018.

The result of our observation, high concentration h2s gas can been observed, especially, instantaneous maximum concentration can have been observed 334ppm at showa crater, and 38ppm at ohjigoku-dani valley. It is necessary to take immediate measures against volcanic gas for climbers.