CAJ | 학술논문

利用网格化插值方法处理唐山微震观测的地震定位数据,得到震级分布、发震时间和震源深度图像.震级分布图像反映了沿北东向条带状分布特征,与唐山-古冶、唐山-陡河与北东向的唐山断裂带有一定的对应关系;发震时间图像反映出北东、北西、北北西向等线性特征;唐山小震震源深度主要分布在中上地壳,震源深度图像的中部和北部震源深度较浅,说明断裂上盘逆冲,故上盘的震源深度较浅;而南部震源深度较深,反映断裂下盘下降.
이용망격화삽치방법처리당산미진관측적지진정위수거,득도진급분포、발진시간화진원심도도상.진급분포도상반영료연북동향조대상분포특정,여당산-고야、당산-두하여북동향적당산단렬대유일정적대응관계;발진시간도상반영출북동、북서、북북서향등선성특정;당산소진진원심도주요분포재중상지각,진원심도도상적중부화북부진원심도교천,설명단렬상반역충,고상반적진원심도교천;이남부진원심도교심,반영단렬하반하강.
Through data processing the location results of micro earthquake in Tangshan region with grid interpolation method the distribution patterns of earthquake magnitudes, original times and hypocentral depths were obtained. The pattern of magnitude distribution is characterized proximately by northeastern zones along Tangshan-Guye,Tangshan-Douhe, which correspond to the NE Tangshan fault belt. The pattern of original time distribution is characterized by NE, NW and NNW zones. The hypocenters are mainly in the middle and upper crust. In the central and northern regions the hypocenters are shallower that indicates the NW part of the fault(hanging wall) thrust,so the hypocenters in the NW thrust upper block are shallower, while in the southern region the hypocenters are deeper. It indicates the hypocenters in the SE lower block are deeper.