【摘要】 利用首都圈和邯郸数字地震遥测台网2002年以来的资料,采用理论地震图拟合观测波形的方法,得到邢台地区96次ML≥2.0地震的震源机制解。分析表明:1)地震主要分布在1966年邢台地震区内,呈共轭交汇条带,因此可以作为邢台地震序列的延续;2)震源机制解应力轴的优势取向和序列早期与华北其它强震的相同,说明该地构造应力场与华北区域构造应力场一致;3)机制解节面占优的走向以NNE-NE和NWW-NW为最多,和序列早期的破裂方向一致,证实近年的中小地震活动具有继承性;4)震源机制类型多样,表明当地的应力水平有别于序列早期。更多还原

【Abstract】 On the basis of the observations from the digitalized telemetric seismic network of the Capital area and Handan since 2002,focal mechanism solutions of 96 earthquakes(ML≥2.0) are inversed by fitting the observed waveforms under the theoretical seismogram.It shows that: 1)Recent earthquakes are distributed in conjugate convergent belts within the Xingtai seismicity region ever since 1966,which can be considered as the current state of the Xingtai earthquake sequences;2)The predominant stress axis orientation of focal mechanism is the same as that of the forepart of Xingtai earthquake sequences as well as other strong earthquakes in North China,it implies that this region was controlled by the same tectonic stress field as in whole North China;3)The dominate nodal plane orientations are mainly in directions of NNE-NE and NWW-NW and consistent with the rupture direction of forepart earthquakes of Xingtai seismic sequences,it demonstrates the inherited seismicity of current moderate and small earthquakes;4) The diversity of focal mechanism indicates that the local tectonic stress field is in lower state,and different from the focal mechanisms of forepart of Xingtai earthquake sequences,so the possibility of strong earthquake is not high.更多还原