根据2006年7月4日河北文安5.1级地震前后首都圈跨断层位移的变化特征,结合该区1970年以来区域断层及区域地震活动特征分析认为:1)2000年以来首都圈NNE向断层逆冲活动增强,显示首都圈现今区域主压应力为NEE方向;2)首都圈及周边地区可能将进入下一个中强地震的活跃时段,河北文安地震是进入这一时段的标志;3)首都圈及周边地区NE向断层垂直活动起伏变化较大,其起伏变化幅度可作为中、长期地震的预测指标。"/>
<SPAN class=datatitle>ON CHARACTERISTICS OF FAULT-CROSSING DISPLACEMENT VARIATION IN IN CAPITAL AREA BEFORE AND AFTER WENAN EARTHQUAKE</SPAN>
Abstract By analyzing the characteristics of fault-crossing displacement variation i n the Capital area before and after the Ms 5.1 Wenan earthquake of Hebei on July 4,2006, and combining the characteristics of regional fault activities and regional seismicity in the area since 1970,it is concluded: 1) Since 2000 the thrust activities of NNE directional faults in the Capital area have been increasing, it shows that the present principal compressive stress in the Capital area is in NEE direction; 2) The Cap ital area and surrounding regionsmay enter the next active period of medium-strong earthquakes, theWenan earthquake marks the beginning of this period; 3) The vertical activities of NE directional faults in the Cap ital area and surrounding areas change strongly, the amp litude of variation may be taken as an index for medium to longterm earthquake prediction.
Jiao Qing,Fan Guosheng. ON CHARACTERISTICS OF FAULT-CROSSING DISPLACEMENT VARIATION IN IN CAPITAL AREA BEFORE AND AFTER WENAN EARTHQUAKE[J]. , 2007, 27(6): 17-21.
Jiao Qing,Fan Guosheng. ON CHARACTERISTICS OF FAULT-CROSSING DISPLACEMENT VARIATION IN IN CAPITAL AREA BEFORE AND AFTER WENAN EARTHQUAKE[J]. jgg, 2007, 27(6): 17-21.
