Electrical feature at the depths of lithosphere–asthenosphere boundary beneath the petit-spot volcanic field in northwestern Pacific

Kiyoshi Baba, University of Tokyo, Bunkyo-ku, Japan, Natsue Abe, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan, Naoto Hirano, Tohoku University, Center for Northeast Asian Studies, Sendai, Japan and Masahiro Ichiki, Tohoku University, Sendai, Japan