Anomalous behaviors of geomagnetic diurnal variations prior to the 2011 Tohoku earthquake （Mw9.0）
作者单位：Department of Geophysics School of Earth and Space Sciences Peking University Graduate School of Science Chiba University
会议名称：《中国地球物理学会第二十九届年会》
会议日期：2013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]
基 金：supported by the National Natural Science Foundation of China (41025014) a Grand-in-Aid for Scientific Research of Japan Society for Promotion of Science (19403002) National Institute of Information and Communication Technology, Japan (R&D promotion funding international joint research)
摘 要：正Many previous investigations suggested that the ultra-low-frequency （ULF, up to 30Hz） is a prospective band for the search for earthquake precursory signatures （Hattori, et al., 2013）. Some study also indicated that the diurnal magnetic variations may be disturbed by large earthquakes （Duma et al., 2003）. In this study,