TY - JOUR
T1 - Infrasound–Electric-Field Coupling Associated With the 2018 Shinmoe-Dake Eruptions, Kirishima Volcanic Complex, Japan
AU - Aniya, Satoru
AU - Aizawa, Koki
AU - Matsushima, Takeshi
N1 - Funding Information:
We thank D. Muramatsu, S. Matsumoto, and H. Shimizu for insightful discussions. We thank Damien Jougnot, an anonymous reviewer, and editor Daoyuan Sun for their constructive comments and suggestions. This work is supported by MEXT, under its Earthquake and Volcano Hazards Observation and Research Program. Satoru Aniya is supported by MEXT Integrated Program for Next Generation Volcano Research and Human Resource Development Grant No. JPJ005391.
Funding Information:
We thank D. Muramatsu, S. Matsumoto, and H. Shimizu for insightful discussions. We thank Damien Jougnot, an anonymous reviewer, and editor Daoyuan Sun for their constructive comments and suggestions. This work is supported by MEXT, under its Earthquake and Volcano Hazards Observation and Research Program. Satoru Aniya is supported by MEXT Integrated Program for Next Generation Volcano Research and Human Resource Development Grant No. JPJ005391.
Publisher Copyright:
© 2022. American Geophysical Union. All Rights Reserved.
PY - 2022/2/16
Y1 - 2022/2/16
N2 - Shinmoe-dake volcano, which is within the Kirishima volcanic complex, Japan, erupted from March to June 2018. The eruptions were recorded by various geophysical instruments that were installed 3.1–5.4 km from the crater. Here we present the first documented evidence of infrasound-induced electric-field changes in the near surface at the time of the explosive eruptions. Significant electric-field changes coincide with the infrasound arrivals. An order-of-magnitude estimation of the electric field indicates that the electrokinetic mechanism induced by pore water movement relative to the host rock, is a plausible cause of the observed infrasound–electric-field coupling. The ground displacement and electric-field particle motions suggest that the infrasound waves from the explosive eruptions produce vertical ground motion, and simultaneously induce horizontal groundwater flow, which subsequently generates electric-field changes due to the propagation of the infrasound wave.
AB - Shinmoe-dake volcano, which is within the Kirishima volcanic complex, Japan, erupted from March to June 2018. The eruptions were recorded by various geophysical instruments that were installed 3.1–5.4 km from the crater. Here we present the first documented evidence of infrasound-induced electric-field changes in the near surface at the time of the explosive eruptions. Significant electric-field changes coincide with the infrasound arrivals. An order-of-magnitude estimation of the electric field indicates that the electrokinetic mechanism induced by pore water movement relative to the host rock, is a plausible cause of the observed infrasound–electric-field coupling. The ground displacement and electric-field particle motions suggest that the infrasound waves from the explosive eruptions produce vertical ground motion, and simultaneously induce horizontal groundwater flow, which subsequently generates electric-field changes due to the propagation of the infrasound wave.
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U2 - 10.1029/2021GL096555
DO - 10.1029/2021GL096555
M3 - Letter
AN - SCOPUS:85125054426
SN - 0094-8276
VL - 49
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 3
M1 - e2021GL096555
ER -