%0 Journal Article
%T Generation mechanisms of ULF electromagnetic emissions before the ML=7.1 earthquake at Hotan of Xinjiang<br>新疆和田ML7.1地震前ULF电磁辐射的激发机理
%A DU Ai-Min
%A ZHOU Zhi-Jian XU Wen-Yao YANG Shao-Feng Institute of Geology
%A Geophysics
%A Chinese Academy of Sciences
%A Beijing
%A China Institute of Tibetan Plateau Research
%A Chinese Academy of Sciences
%A Beijing
%A China Institute of Mathematics
%A Physics
%A China Agriculture University
%A Beijing
%A China
%A <br>杜爱民
%A 周志坚
%A 徐文耀
%A 杨少峰
%J 地球物理学报
%D 2004
%I 
%X The earthquake M L7.1 took place at Hotan of Xinjiang province on Oct.19, 1996. Three types of Ultralow frequency(ULF) electromagnetic precursors were observed before the earthquake: (1) drift of dynamic zeros, (2) the vertical direction of the major axis of the polarization ellipse orientated to the epicenter, and (3) large amplitude of ULF electromagnetic radiation. A simple model for the generation mechanism of these precursors is proposed. Based on this model, we explain the effect of static electric field inducted by dipole on the variation of voltage and direction of axis on polarization ellipse for horizontal components.
%K Generation mechanism
%K ULF electromagnetic precursor
%K Earthquake
%K Hotan<br>电磁辐射
%K ULF地磁前兆
%K 激发机制
%K 电偶极子
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=194B8425C0E31FD1&yid=D0E58B75BFD8E51C&vid=F4B561950EE1D31A&iid=94C357A881DFC066&sid=AB1DE136C335A86C&eid=2C8B50BA95995EA2&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=0&reference_num=20