【摘要】 本文利用嘉峪关断层带土壤气氡1998～2009年的观测数据,结合周边地区的ML≥5.0地震,提取氡在年尺度上的变化,系统分析了嘉峪关断层带土壤气氡与气温、地温和降雨等因素的关系以及氡浓度变化与周边地震活动的关系。研究结果表明,嘉峪关断层氡的年变化周期主要受气温控制,该台对祁连山西段和德令哈附近地区中等以上强度的地震响应较为灵敏,当氡值年变起伏较大时,附近地区地震活动性较强;反之,则地震活动性较弱。更多还原

【Abstract】 By analyzing the radon data of Jiayuguan fault for nearly two decades and their main influencing factors,and the relationships between radon and air temperature,ground temperature,rainfall and so on,we summarize the earthquake reflecting effect for ML≥5.0 about 400km within the Jiayuguan station.We find that it has better earthquake-reflecting before earthquakes,usually with abnormal changes in sustained low value.By extracting the annual trend of radon in the Jiayuguan station for many years,we discover that the annual trend of radon has a close relationship with the seismic activity in surrounding areas:If the annual variation of radon is larger,the seismic activity in surrounding areas is stronger;on the other hand,if the annual variation of radon is relatively stable,the seismic activity in the vicinity is weak.更多还原