[S-CG52] Dynamics in mobile belts

Fri. May 27, 2022 1:45 PM - 3:15 PM 301A (International Conference Hall, Makuhari Messe)

convener:Yukitoshi Fukahata(Disaster Prevention Research Institute, Kyoto University), convener:Hikaru Iwamori(Earthquake Research Institute, The University of Tokyo), Kiyokazu Oohashi(Graduate School of Sciences and Technology for Innovation, Yamaguchi University), Chairperson:Yukitoshi Fukahata(Disaster Prevention Research Institute, Kyoto University), Ayumu Miyakawa(Institute of Geology and Geoinformation (IGG), Geological Survey of Japan, AIST)

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. After the 2011 great Tohoku-oki earthquake, large-scale changes in seismic activity and regional scale crustal deformation were observed, 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.

+Add all to schedule

1:45 PM - 2:00 PM

[SCG52-13] Large subsidence in NW Colombia as a result of slow strain accumulation over an EQ cycle under a viscoelastic earth

*Sindy Carolina Lizarazo¹, Takeshi Sagiya^1,2 (1.Graduate School of Environmental Studies-Nagoya University, 2.Disaster Mitigation Research Center - Nagoya University)

2:00 PM - 2:15 PM

[SCG52-14] Modeling of stress loading under Kanto constrained by geological data: towards elucidation of mechanism of damaging earthquakes under Tokyo

★Invited Papers

*Akinori Hashima¹ (1.Japan Agency for Marine-Earth Science and Technology)

2:15 PM - 2:30 PM

[SCG52-15] Spatial change in differential stress magnitudes around the source fault before the 2016 Central Tottori Prefecture earthquake

*Yoshihisa Iio¹, Satoshi Matsumoto², Joint aftershock observation group of the Central Tottori Prefecture earthquake (1.Disater Prevention Research Institute, Kyoto University, 2.Kyushu Unicersity)

2:30 PM - 2:45 PM

[SCG52-16] Tectonic stress fields estimated from long-term CMT data ranging over different periods

*Toshiko Terakawa¹, Mitsuhiro Matsu'ura² (1.Earthquake and Volcano Research Center, Graduate School of Environmental Studies, Nagoya University, 2.Institute of Statistical Mathematics)

2:45 PM - 3:00 PM

[SCG52-17] Predictive decay functions to forecast long-term GNSS time series after the 2011 Tohoku-oki earthquake

*Sambuddha Dhar¹, Jun Muto¹ (1.Department of Earth Science, Tohoku University, Sendai, Japan)

3:00 PM - 3:15 PM

[SCG52-18] Active faults associated with the half-graben structure and its inversion tectonics inferred from the basalment structure around Mikawa Bay, Japan.

*Ayumu Miyakawa¹, Tomoya Abe¹, Tatsuyay Sumita¹, Makoto Otsubo² (1.Institute of Geology and Geoinformation, Geological Survey of Japan, AIST, 2.Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan, AIST)