【摘要】 华清4#泉水溶气体百分含量合计(QB)的取值范围为100±5。按4舍5入法取整数值,将其分为11个区段。以年为单位,统计QB落在每个区段内的频次。频率分布直方图显示,在QB取值区间内,分区段频率呈近似正态分布。将落入QB频率最高的区段称为轴,将轴在不同区段上位置的变化称为轴漂。研究表明,QB在不同区段上轴的漂移,反映了区域应力场的不同状态。轴落入99区段上,反映的是区域应力场的增强,与远场M≥7.0地震及伴生中强地震、鄂尔多斯块体周边后继中强地震有很好的相关性;轴落入98区段上,反映的是区域应力场的相对稳定;轴落入97区段上,反映的是巨大地震后,区域应力场的调整及中强地震活动格局的变化。文中还阐述了99区段轴值与地震对应关系的几个特征。更多还原

【Abstract】 Total percentage content of water-dissolved gas(Q_B) in Huaqing, Lintong, No.4 hotspring spot ranges from 95 to 105. We divided Q_B into 11 sections after rounded it to integer, and took year as unit to do a frequency statistics of Q_B falling into each section. Based on frequency statistical histogram, the shape of frequency is close to normal distribution in each Q_B section. The section where the maximum Q_B is located is named as axis, and the change of the axis in different section is called as axis drift.The drift of Q_B axis in each section indicates different status of regional stress field. When the axis lies in section 99, it indicates the strengthening of regional stress field and a good correlation with M≥7.0 earthquakes in far field, a series of associated moderate earthquakes and subsequent moderate earthquakes around the Erdos block; when the axis lies in section 98, it indicates the relative stability of regional stress field; when in section 97, it indicates the adjustment of regional stress field and the change of moderate earthquake pattern after a great earthquake. We also discussed the relationship between earthquakes and the value of axis in section 99.更多还原