HR: 1340h
AN: V53A-0603    [Abstracts]
TI: Fast Timescale Phenomena at Changbaishan Volcano as Inferred from Recent Seismic Activities
AU: Hong, H
EM: honghj@public.bta.net.cn
AF: Institute of Geology, China Earthquake Administration, Beijing, 100029 China
AU: * Kadlec, B J
EM: kadlec@msi.umn.edu
AF: Department of Geology and Geophysics and Minnesota Supercomputing Institute, Univ. of Minnesota, Minneapolis, MN 55455 United States
AU: Yuen, D A
EM: davey@krissy.geo.umn.edu
AF: Department of Geology and Geophysics and Minnesota Supercomputing Institute, Univ. of Minnesota, Minneapolis, MN 55455 United States
AU: Zheng, Y
EM: zhengyq@mail.jl.cn
AF: Earthquake Administration of Jilin Province, 188 Renmin Avenue, Changchun, 130022 China
AU: Zhang, H
EM: CBSlgm@public.cc.jl.cn
AF: Earthquake Administration of Jilin Province, 188 Renmin Avenue, Changchun, 130022 China
AU: Liu, G
EM: atcbshsz@public.yj.jl.cn
AF: Earthquake Administration of Jilin Province, 188 Renmin Avenue, Changchun, 130022 China
AU: Dzwinel, W
EM: dzwinel@uci.agh.edu.pl
AF: AGH Institute of Computer Science, al. Mickiewicza 30, Krak¢w, 30-059 Poland
AB: The Changbaishan (Baitoushan) volcano, located at the norththeast frontier of the North China craton, is the highest mountain in northeast Asia. This rhyolite stratovolcano is far from the Pacific Plate subduction zone, but the subducting slab extends into the interior of the Asian continent. A NNW deep earthquake strike belt, with source depth between 500-600km, is situated 250-300km northeast to the volcano. There are other Cenozoic volcanoes in the area, such as Tudingzishan, Xiaobaishan, Baotaishan, Lufeng, Huangfeng, which form a NW volcano belt nearly parallel to the 500km deep earthquake belt. In 1999, an integrated monitoring system was established in Changbaishan Volcano Observatory to observe the seismicity, surface deformation and geochemical variations. We have analyzed this data at a short timescale and using cluster analysis. When looked at across a span of 5 years there can be seen a relationship with clusters of seismic events grouped at a small time scale (in the order of a few years) which signal a precursor to impending eruptive events. Zhang Hengrong, Liu Guoming, Wu Chengzhi, Kong Qingjun, Guo Feng, 2003, Preliminary Study on the Active State of Changbaishan Tianchi Volcano, Seismology and Geology, Vol 25, suppl., 109-120. Wei, Haiquan, Hong Hanjing, R.S.J.Sparks, et al, 2004, Potential Hazards of Eruptions around the Tianchi Caldera Lake, China, Acta Geology, Sinica, 78(3), 790-794.
DE: 7280 Volcano seismology (8419)
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2004 AGU Fall Meeting