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Delegation Led by Professor Barry Parsons of British Oxford University Visited IGL for Academic Exchange

2016/12/30 9:15:13

At the invitation of Academician Zhang Peizhen and Researcher Zheng Wenjun of IGL, five people from British Oxford University including Professor Barry Parsons, Richard Walker and Post-Doctor Austin Elliott dropped in IGL, carried out academic exchange and discussed future project cooperation on April 13~14, 2016 before Beijing Kickoff Meeting of Sino-British International Cooperation Project for Geological Hazards.

On April 13, Professor Barry Parsons made a report titled “Post-seismic slip for large thrust-fault earthquakes:  the 2011 VanTurkey, and 1978 Tabas, Iran events”, and introduced InSAR data was mainly used for Turkish 2011 Van Earthquake, and aerial photos in 1950s-1960s and modern remote sensing images were used for Iranian 1978 strong earthquake to extract and compare high-accuracy DEM, separately obtain the characteristics of coseismic deformation and post-seismic deformation of the two strong earthquakes, and deepen the analysis of macroseismic deformation and geomorphic formation mechanisms in combination with geomorphic deformation characteristics relevant with strong earthquakes. On April 14, Professor Richard Walker made a report titled “Historic and Prehistoric earthquake ruptures of central Asia” and introduced some historical strong earthquakes happening in northern Tianshan Mountain, but the seismogenic faults and surface ruptures of these historical strong earthquakes are still not ascertained. By using hydrogen balloons to take photos and extract high-precision DEM, or by combining field investigation with excavation of an exploratory trench, or by other conventional methods, Professor Walker has ascertained coseismic surface rupture, coseismic displacement and accumulated displacement of these historical strong earthquakes and obtained paleo-earthquakes and slip rates on these faults.

Through this exchange, we had deeper understanding on the approach of international peers to scientific peers, on coseismic and post-coseismic deformation characteristics, and landform and post-seismic deformation relations of the 2011 Turkish Van Earthquake, the 1978 Iranian Tabas Earthquake and other earthquake; and on seismogenic structure and coseismic surface rupture of historical earthquakes in northern Tianshan Mountain in 1911 and 1889, and paleo-earthquake history and slip rate of seismogenic faults. In addition, the method of extracting DEM by using old aerial photos also aroused extensive attention and heated discussion. After the academic exchange meeting, the delegation led by Barry Parsons discussed the goal, content and concrete work arrangement of cooperation with related scientific research personnel of IGL undertaking Sino-British International Cooperation Project for Geological Hazards.