[S-EM17] Geomagnetism, Paleomagnetism and Rock Magnetism

Thu. May 28, 2026 1:45 PM - 3:15 PM Exhibition Hall Special Setting (7) (Exhibition Hall 7&8, Makuhari Messe)

Chairperson:Yamamoto Yuhji(Marine Core Research Institute, Kochi University), Tanimoto Akihiro(Ibaraki University), Oda Hirokuni(Institute of Geology and Geoinformation, Geological Survey of Japan, AIST)

The remarkable progress in Earth Sciences today owes much to our understanding of Earth's magnetic field. This session invites contributions on the latest advances in geomagnetism, paleomagnetism, rock magnetism, and their wide-ranging applications to geophysical and geological problems. We welcome presentations on topics such as the geodynamo, present and ancient geomagnetic field behavior, fundamental rock magnetic properties, paleogeography including tectonic processes, and insights into paleoclimate. In addition, we encourage submissions related to satellite- and ground-based magnetic field observations, studies of lunar and planetary magnetism, and magnetic investigations of meteorites, which are new windows into planetary evolution and solar system history. We also welcome innovative methodologies, software tools, and instrumentation that support and expand these research frontiers. Through this session, we aim to foster forward-looking discussions that will inspire future breakthroughs in magnetism-related Earth and planetary sciences. We encourage contributions that stimulate interdisciplinary collaborations toward establishing the SEDI-Japan community.

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1:45 PM - 2:10 PM

[SEM17-01] Multidecadally to centennially resolved field behavior associated with geomagnetic excursions over the last glacial cycle

Yu-Min Chou¹, Xiang Zhao², Huihui Yang¹, Xiuyang Jiang³, Qingsong Liu¹, Hsun-Ming Hu⁴, Chun-Che Wu⁵, Tsai-Lun Yu⁶, Chun-Yuan Huang⁴, Wei Zheng¹, Xiaodong Jiang⁷, Yufeng Lin¹, Jinfeng Li¹, Jiabo Liu⁸, Chun-Chieh Wang⁹, Cheng-Cheng Chiang⁹, Peng Han¹, Yaoqi He¹⁰, Zhiqiang Liu¹, Yansong Li¹, *Andrew P Roberts², Chuan-Chou Shen⁴ (1. Southern University of Science and Technology, 2. Australian National University, 3. Fujian Normal University, 4. National Taiwan University, 5. Nanjing Normal University, 6. National Academy of Marine Research, 7. Hainan University, 8. China University of Geosciences (Wuhan), 9. National Synchrotron Radiation Research Center, 10. Guizhou Minzu University)

2:10 PM - 2:25 PM

[SEM17-02] A Remarkably Extended Eocene Geomagnetic Reversal Revealed by Sedimentary Records at IODP Site U1408

*Yuhji Yamamoto¹, Boulila Slah², Futoshi Takahashi³, Peter C. Lippert⁴ (1. Marine Core Research Institute, Kochi University, 2. Sorbonne Universite, CNRS , 3. Kyushu University, 4. University of Utah)

2:25 PM - 2:40 PM

[SEM17-03] A detailed paleomagnetic record of the Gauss-Matuyama geomagnetic reversal from an oriented boring core drilled through the Quaternary base horizon of a Plio-Pleistocene marine succession in the southernmost part of the Boso Peninsula, Japan

*Makoto Okada¹, Ryoka Yuhara², Daiki Nagatomo², Yusuke Suganuma^4,3 (1. Department of Earth Sciences, Faculty of Natural Basic Sciences, Ibaraki University, 2. Graduate School of Science and Engineering, Ibaraki University , 3. National Institute of Polar Research , 4. SOKENDAI)

2:40 PM - 2:55 PM

[SEM17-04] Geomagnetic excursions recorded in the Chikura Group of the southernmost part of the Boso Peninsula during the Late Pliocene

*Akihiro Tanimoto¹, Makoto Okada¹ (1. Department of Earth Sciences, Faculty of Natural Basic Science, Ibaraki University)

2:55 PM - 3:10 PM

[SEM17-05] Apparent decrease of relative paleointensity proxy in deep-sea surface sediments of several tens of centimeters below the seafloor

*Toshitsugu Yamazaki^1,2, Yuhji Yamamoto¹, Tetsuro Sato¹, Masafumi MURAYAMA¹ (1. Marine Core Research Institute, Kochi University, 2. Atmosphere and Ocean Research Institute, The University of Tokyo)

Discussion (3:10 PM - 3:15 PM)

Session information