[S-EM18] Electric, magnetic and electromagnetic survey technologies and scientific achievements

Sun. May 24, 2026 1:45 PM - 3:15 PM 301A (International Conference Hall, Makuhari Messe)

Chairperson:Usui Yoshiya(Earthquake Research Institute, the University of Tokyo), Minami Takuto(Division of Frontier Planetology, Department of Planetology, Graduate School of Science, Kobe University)

Detailed and accurate subsurface images by electric, magnetic and electromagnetic (EM) surveys are indispensable for investigating the Earth's interior for both academic and commercial purposes. These EM studies cover a broad range of targets in various spatial-temporal scales and places on land and seafloor; e.g., natural resource exploration, environment and geohazard evaluation, and crustal and mantle tectonics and dynamics. Technologies and techniques for data acquisition, analysis, and interpretation have many challenges that should be addressed by scientists and engineers in cooperation. Also, the knowledge should be shared in the international community for further development of this field. The session invites papers on recent advances in the electric, magnetic, and EM survey technologies including instrumentation, data processing, modeling, inversion and imaging, as well as scientific achievements including novel ways of interpretation. The session is partially associated with activities of the Study of Earth's Deep Interior, Japan (SEDI-J).

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1:45 PM - 2:05 PM

[SEM18-11] Efficient 3D Magnetotelluric Inversion Algorithm Based on Solution Space Dimensionality Reduction

★Invited Papers

*Xiangyun Hu¹, Ningbo Bai², Bo Han³, Ronghua Peng¹, Junjun Zhou² (1. China University of Geosciences, School of Geophysics and Geomatics, Wuhan, China., 2. Henan Polytechnic University, Department of Physics and Electronic Information, Jiaozuo, China., 3. China University of Geosciences, Institute of Natural Resources Survey, Wuhan, China.)

2:05 PM - 2:20 PM

[SEM18-12] Investigation of the Lembang Fault, Bandung, Indonesia, Using Two-Dimensional Magnetotelluric Modeling

*Nurhasan Nurhasan¹, Wahyu Srigutomo¹, Enjang Jaenal Mustopa¹, Hidayat Hidayat², Bagus Endar B Nurhandoko¹, M Zulfansyah Saepul Mutaqin¹, Ihyaudin Hasbillah¹, Yasuo Ogawa^3,4, GM Lucki Junursyah² (1. Physics Department, Bandung Institute of Technology, Indonesia, 2. Center for Geological Survey, Geological Agency, Indonesia, 3. Tohoku University, Japan, 4. Institute of Science Tokyo, Japan)

2:20 PM - 2:35 PM

[SEM18-13] Magnetotelluric Investigation of Subsurface Structures Associated with the 2025 Seismic Swarm in Lamongan Volcanic Field, East Java, Indonesia: Fault or Magmatic Origin?

*Agnis Triahadini¹, Calvin Ashari Dwiska¹, I Gede Nova Darma Putra¹, Achmad Dany Kurniawan¹, Muhammad Akbar Maulana Syahputra¹, Ahmad Zidan Sutidar¹, Alutsyah Luthfian¹, Kadek Hendrawan Palgunadi¹, Muhammad Haris Miftakhul Fajar¹, Imam Catur Priambodo², Priatin Hadi Wijaya² (1. Departmen of Geophysical Engineering, Faculty of Civil, Planning and Geo-Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, West Java, Indonesia, 2. Center of Volcanology and Geological Hazard Mitigation, Geological Agency of Indonesia, Bandung, West Java, Indonesia)

2:35 PM - 2:50 PM

[SEM18-14] Development of a Low-Cost, Open-Architecture Magnetotelluric Instrumentation System

*CHANG PINGYU¹, Jordi Mahardika Puntu¹, Haiyina H. Amania¹, Yekti Widyaningrum¹, Agung Nugroho Ramadhan¹, YungTse Huang² (1. National Central University, Taiwan, 2. Natiobal Chung Cheng University, Taiwan)

2:50 PM - 3:05 PM

[SEM18-15] A Compact Seafloor Electromagnetic Receiver for marine geomagnetic surveys and seafloor magnetotelluric detection

*Xiaochen Li^1,2, Kai Chen², Kiyoshi Baba¹ (1. Earthquake Research Institute, The University of Tokyo/China University of Geosciences in Beijing, 2. China University of Geosciences, Beijing)

Discussion (3:05 PM - 3:15 PM)

Session information