Characteristics and application test of long period microtremor in China

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• 作者：Shaokong FengAilan CheLanmin WangZhijian WuHiroaki Yamanaka
• 会议时间：2014-10-19
• 关键词：Long period microtremor ; Array microtremor ; H/V observation ; Power spectrum ; Site characterization ; Earthquake engineering
• 作者单位：Shaokong Feng,Ailan Che(Shanghai Jiaotong Univ.,No.800 Dongchuan Rd.,Minhang District,Shanghai,China)Lanmin Wang,Zhijian Wu(Lanzhou Institute of Seismology,China Earthquake Administration,Lanzhou,China)Hiroaki Yamanaka(Tokyo Institute of Technology,Nagatsuta-cho,Midori-ku,Yokohama,Kanagawa,226-8503,Japan)
• 母体文献：2014年中国地球科学联合学术年会论文集
• 会议名称：2014年中国地球科学联合学术年会
• 会议地点：北京
• 主办单位：中国地球物理学会
• 语种：chi

摘要

As a simple,quick and inexpensive method for site characterization and deep geological survey,array microtremor survey as well as H/V observation is expected to play important roles in China’s earthquake disaster prevention program,especially in the vast,economically delayed inland area.We started a co-study program on the characteristics and applications of long period microtremor in China continent from 2008.We have made microtremor observations from the coast cities like Shanghai and Tianjin through Beijing,Xi’an,to the far inland cities Lanzhou and Tianshui over the continent using long period seismometers.We also carried out some field test of applications for structure survey.The observation shows that the level of power spectrum of long period microtremor in the coast area is the same as in Japan.From the coast to the inland area,the level reduced rapidly,but even in Tianshui,which is over 1500 kilometers from the coast,with careful observation,it is still possible to use for geological survey.