震前自然电场的前兆及其可能机理  

Precursor and possible mechanism of natural geoeleotric field before earthquakes

作　　者：陈有发[1] 马钦忠[2] 张杰[1] 丁卉[1] 薛顺章[1] 陈兰新 赵凤平 

机构地区：[1]中国地震局兰州地震研究所,甘肃兰州730000 [2]兰州大学,甘肃兰州730000 [3]青岛市城阳区地震办公室,山东青岛266109

出　　处：《华南地震》1999年第3期26-34,共9页South China Journal of Seismology

基　　金：地震科学联合基金会资助!(197018);中国地震局兰州地震研究所科技论著! LD1999007

摘　　要：研究了震前自然电场的前兆及其可能机理。主要结论：（１）５．４－６．２级地震在１５０－２００ｋｍ， ７． ０－ ７． ９级地震在 ２５０ ｋｍ范围内自然电场出现前兆；（２）过滤电场、电化学电场、土体受压变密和机电转换可能是自然电场的前兆机理。The earthquake precursor and mechanism of natural geoelectric field have been studied in this paper. The mean results show that: (1)The range of the natural geoelectric field precursor before earthquakes with 5 .4 ≤ M≤6. 2 is 150 ~ 250 km and before earthquakes with 7 .0≤ M≤7.9≤is 250 km around the observation area; (2)The filtrating electrical field , redox potential, the solum changing into compact under the pressure and machine-electricity transform are possible mechanisms of the natural geoolectric field precursor.

关 键 词：地震前兆 自然电场 前兆机理 过滤电场 机电转换 

分 类 号：P315.7[天文地球—地震学]