【摘要】 以沿山西断裂带布设的GPS监测网的6期复测资料(1999~2004)所计算的近期趋势性运动速率为基础,获得了2005、2006年山西断裂带相对于近期趋势性运动的偏离结果。结果显示:(1)趋势性差异运动信息不显著,运动信息明显的点数只占十分之一,它们分别是S21、S20、S30和S33(位于太原以南),量级最大约6mm/a;(2)尽管单站趋势性运动信息不显著,但整体模拟计算表明,1999~2004年似乎有南北相对运动的迹象,相对变化最大约2.0mm/a;(3)2005年有偏离趋势运动的迹象,且背离趋势运动方向,最大量级约7mm;(4)截至2006年的累计偏离量最大约6mm;这表明2006年基本未发生累计偏离。由于变化相对平稳,这可能预示着山西断裂带内近期地震活动强度不太可能明显提高。更多还原

【Abstract】 The movement that Shanxi rift zone departures from its tendency in recent years is calculated with the data in 6 observations(1999～2004) in the GPS monitoring network along Shanxi rift zone.The results show that,(1) as the differential sites accounted for only 1/10,which was S21,S20,S30 and S33 site respectively,the differential movement with maximum of 6mm/a was not notable;(2) the whole rift zone had a sign to move in south and north direction,with a rate about 2.0 mm/a;(3) the departure movement in 2005 was obvious,which its largest velocity is about 7 mm;(4)The accumulative departure in 2006 is about 6mm,it indicates there is almost no deviation in 2006.As the variation is comparatively steady,the recent level of seismic activity in the zone may not be high.更多还原