4:15 PM - 4:35 PM
*Qinghua HUANG1, Hengxin REN2 (1.Peking University, 2.Univ Sci Tech China)
International Session (Oral)
Symbol S (Solid Earth Sciences) » S-CG Complex & General
Sun. May 24, 2015 4:15 PM - 6:00 PM 203 (2F)
Convener:*Yukio Fujinawa(Risk Control Associations), Yasuhide Hobara(Graduate School of Information and Engineering Department of Communication Engineering and Informatics, The University of Electro-Communications), Qinghua Huang(Department of Geophysics, Peking University), Niels Grobbe(TU Delft / Delft University of Technology), Chair:Yasuhide Hobara(Graduate School of Information and Engineering Department of Communication Engineering and Informatics, The University of Electro-Communications), Qinghua Huang(Department of Geophysics, Peking University)
The microcrack has been widely investigated in various disciplines including seismology and geotechnical engineering communities. Disastrous natural events such as earthquakes, volcanic eruptions or landslides are considered as ruptures of the Earth's crust consisting of heterogeneous rocks. These ruptures have been known to be preceded by small microcracks in the preparatory stage. They are accompanied by so-called acoustic emission (AE) and seismo- electromagnetic phenomena providing means to investigate the rupture process of earthquake and ground slides, rock bursts in mines, and health check of tunnels.
Moreover, seismoelectronics has been developed as new windows to determine physical parameters of the crust and its fluids in the geophysical exploration using active sources. The method has been used for detecting the electrical, hydraulic, and/or mechanical properties by measuring the mechanical energy conversion characteristics into electromagnetic energy at crustal macroscopic interfaces.
The research on the seismo-electromagnetic fields had a remarkable progress in the early 1990's. Examples are 1) the seismoelectric conversion generating an independently diffusing electromagnetic field at material contrasts for surveying for oil and gas, 2) the coupling between seismic and electromagnetic phenomena, 3) the ULF band anomalies associated the slow-slip of subducting slab, 4) the combination of both seismic resolution and electromagnetic (fluid) sensitivity, and 5) the possible detection of micro-cracks preceding natural earthquakes.
We intend to present state-of-the-art investigations on microcracks in a variety of disciplines, amongst which are new findings using seismoelectric phenomena and other new techniques for understanding of the microcracks preceding crustal ruptures. We hope to contribute in building a more practical short-term prediction method and in developing geophysical prospecting.
4:15 PM - 4:35 PM
*Qinghua HUANG1, Hengxin REN2 (1.Peking University, 2.Univ Sci Tech China)
4:35 PM - 4:50 PM
*Yukio FUJINAWA1, Yoichi NODA2 (1.Mieruka Bousai Inc., 2.Tierra Tecnica Ltd)
4:50 PM - 5:05 PM
*Wenchi LAI1, Shihjung WANG2, Kuochon HSU3, Chjenglun SHIEH1 (1.Disaster Prevention Research Center, National Cheng Kung University, 2.Georesources Research Center, National Cheng Kung University, 3.Department of Resources Engineering, National Cheng Kung University)
5:05 PM - 5:25 PM
*Niels GROBBE1, Evert SLOB1 (1.Delft University of Technology)
5:25 PM - 5:40 PM
*Lanbo LIU1, Qinghua HUANG2 (1.Department of Civil and Environmental Engineering, University of Connecticut, 2.Department of Geophysics Peking University)
5:40 PM - 5:43 PM
*Niels GROBBE1, Peter MAAS1, Evert SLOB1, Wim MULDER2 (1.Delft University of Technology, 2.Shell Global Solutions International BV)
5:43 PM - 5:46 PM
*Xiangyang KONG1, Kaizhi SU2, Yukio FUJINAWA3 (1.Earthquake Administration of Shandong Province,china, 2.Institute of Crustal Dynamics,CEA,china, 3.Risk Control Associations)