Characteristics and application test of long period microtremor in China
作者单位：Shanghai Jiaotong Univ. Lanzhou Institute of Seismology China Earthquake Administration Tokyo Institute of Technology
会议名称：《2014年中国地球科学联合学术年会——国际专题（2）Microseismic Monitoring and Inversion》
会议日期：2014年
学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学]
关 键 词：Long period microtremor Array microtremor H/V observation Power spectrum Site characterization Earthquake engineering
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.