Solid Earth Sciences (S)
Session Sub-category Complex & General(CG)
Session ID S-CG61
Title Dynamics in mobile belts
Short Title Dynamics in mobile belts
Main Convener Name Yukitoshi Fukahata
Affiliation Disaster Prevention Research Institute, Kyoto University
Co-Convener 1 Name Hikaru Iwamori
Affiliation Earthquake Research Institute, The University of Tokyo
Co-Convener 2 Name Kiyokazu Oohashi
Affiliation National Institute of Advanced Industrial Science and Technology
Session Language 
J
Scope 
The dynamic behaviors of mobile belts are expressed across a wide range of time scales, from the seismic and volcanic events that impact society during our lifetimes, to orogeny and the formation of large-scale fault systems which can take place over millions of years. Deformation occurs on length scales from microscopic fracture and flow to macroscopic deformation to plate-scale tectonics. To gain a physical understanding of the dynamics of mobile belts, we must determine the relationships between deformation and the driving stresses associated with plate motion and other causes, which are connected through the rheological properties of the materials. To understand the full physical system, an integration of geophysics, geomorphology, geology, petrology, and geochemistry is necessary, as is the integration of observational, theoretical and experimental approaches. In particular, rheological properties, which are physically affected by fluids in the crust and chemical reactions assisted by fluids, can be resolved only through such an interdisciplinary approach. Frequent large earthquakes, such as the 2011 Tohoku-oki, the 2016 Kumamoto, and the 2024 Noto Peninsula Earthquakes, which were accompanied by significant changes in seismic activity and crustal deformation, making present-day Japan a unique natural laboratory for the study of the dynamics of mobile belts. This session welcomes presentations from different disciplines, such as seismology, geodesy, tectonic geomorphology, structural geology, petrology, geochemistry and hydrology, as well as interdisciplinary studies, that relate to the dynamic behaviors of mobile belts.
Presentation Format Oral and Poster presentation
Invited Authors Atsushi Okamoto (Graduate School of Environmental Studies)
Dyuti Prakash Sarkar (Yamaguchi University)
Takahiko Uchide (Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST))
Time Presentation No Title Presenter
Oral Presentation May 28 PM1
13:45 - 14:00 SCG61-01 Crustal structure factors constraining hypocenter distribution in the eastern part of the 2024 Noto Peninsula earthquake, Japan Sea Tetsuo No
14:00 - 14:15 SCG61-02 Characteristics of the resistivity structure around the earthquake swarm activity leading up to the 2024 Noto (Mw7.5) earthquake Ryokei Yoshimura
14:15 - 14:30 SCG61-03 Three-dimensional electrical resistivity structure beneath the Nikko-Ashio area, Northeastern Japan Yoshiya Usui
14:30 - 14:45 SCG61-04 Observation of geological structure and rock microstructure associated with strain release along a plate boundary fault Yoshiasa Haruki
14:45 - 15:00 SCG61-05 Geofluid mapping in the Atotsugawa fault-Takayama area, Central Japan, based on simultaneous analysis of seismic velocities and electrical conductivity Hikaru Iwamori
15:00 - 15:15 SCG61-06 Nonlinear Coupling of 3D Velocity Heterogeneity and Seismic Potential in the Japan Arc decoded by Machine Learning Zhang Chunjie
Oral Presentation May 28 PM2
15:30 - 15:45 SCG61-07 Relative significance of Si-, Mg- and CO2-metasomatism at shallow mantle wedge Atsushi Okamoto
15:45 - 16:00 SCG61-08 Coalescing microstructural studies and carbonate clumped isotope thermometry in fault zone research: insights from the calcite veins in Himalayan Frontal Fold Thrust Belt Dyuti Prakash Sarkar
16:00 - 16:15 SCG61-09 The S-wave polarization anisotropy in the eastern Hokkaido, Japan. Ryotaro Fujimura
16:15 - 16:30 SCG61-10 GNSS strain rate field and factors contributing to topographic evolution of the Tsugaru Strait and its surroundings Reina Akiyama
16:30 - 16:45 SCG61-11 Evaluation crustal stress state in seismic active region using seismic moment efficiency and b-value (3) Satoshi Matsumoto
16:45 - 17:00 SCG61-12 Physical interpretation of compensated linear vector dipole and rational decomposition of moment tensor Mitsuhiro Matsuura
Oral Presentation May 29 AM1
9:00 - 9:15 SCG61-13 Modelling post-seismic gravity change with nonlinear rheology for satellite gravimetry Kazuma Nakakoji
9:15 - 9:30 SCG61-14 Why did the 1984 Western Nagano Prefecture earthquake (Mj6.8) occurred (ser.2) Yoshihisa Iio
9:30 - 9:45 SCG61-15 Crustal Strain Rate Distribution Derived from an Ultra-Dense GNSS Observation Network in Japan Miku Ohtate
9:45 - 10:00 SCG61-16 Unintuitive Displacement Fields Caused by Horizontal and Thrust Faults in an Elastic-Viscoelastic Layered Half-Space Koitaro Koide
10:00 - 10:15 SCG61-17 Tectonics and Seafloor Topography around Japan Hamana Moe
10:15 - 10:30 SCG61-18 Formation of the Kinki triangle zone, SW Japan Hiroshi Sato
Presentation No Title Presenter
Poster Presentation May 28 PM3
SCG61-P01 Seismicity beneath Mutsu Bay, Aomori Prefecture, NE Japan, and shear wave splitting analysis on it Tomomi Okada
SCG61-P02 Crust/uppermantle deformation structure across the central NE Japan arc - Integrated interpretation for the 2019 onshore seismic profiling - Takaya Iwasaki
SCG61-P03 Crustal heterogeneity beneath the Median Tectonic Line estimated by the seismic velocity structure Asami Kimura
SCG61-P04 Study of stress fields on the sedimentary succession in the Eastern Fram Strait from borehole resistivity images obtained in IODP Exp.403 Yuhi Sakai
SCG61-P05 Revisiting electrical resistivity structure beneath the southern Tohoku district and estimating geofluid volume fraction from resistivity and P-wave velocity models Masahiro Ichiki
SCG61-P06 Stress map of the inland Japan inferred from focal mechanism solutions of small earthquakes Takahiko Uchide
SCG61-P07 Heterogeneity of tectonic stress field and its spatial pattern inferred from focal mechanisms clustering in Sulawesi, Indonesia Muhammad Taufiq Rafie
SCG61-P08 Temporal changes of stress and friction conditions revealed by fault-slip analysis Katsushi Sato
SCG61-P09 Heterogeneous Stress Field in the Nothen Kyushu Island Based on Focal Mechanism Data Hiromi Sunagawa
SCG61-P10 Stress heterogeneity at the bottom of the seismogenic layer in Kyushu, Japan - relation to anelastic deformation of the lower crust - serika mishima
SCG61-P11 Structural evolution of the Nambayama and Tozaki Anticline based on fault-related fold modeling, Northern Fossa Magna, central Japan Naoki ITO
SCG61-P12 Coexistence of reverse and normal faults formed in horizontal compressive stress field Kenta Kobayashi
SCG61-P13 Effect of westward motion of the Philippine Sea plate on the east-west compression in the Japanese islands Akinori Hashima
SCG61-P14 Relationship between Slab Configuration, Slab Age, and Plate Motion Takashi Nishizawa
SCG61-P15 Steady coupling along the Nankai trough and Median Tectonic Line (MTL) estimated from GNSS and InSAR observation Kohei Shimotsuma
SCG61-P16 A multiscale viscoelastic model of mantle convection and great earthquake cycles in subduction zones Hang Zhang
SCG61-P17 Function modeling of postseismic GNSS time series following the 2010 Mw 8.8 Chile Maule Earthquake Tomohiro Yamashita