山东定陶、菏泽、聊城地震台,地处平原地区,为土层台基。建台十多年来,记录了大量的地方震、近震和爆破资料,反映了土层台基和岩性台基不同的记录特征。主要表现为土层台基记录的地震初至 P 波三分向到时不一致;水平向初至震相丢头;地震波周期偏大等特点。就此,我们取这三台记录的典型地震,分析土层台基的震相记录特征。 Shandong Dingtao, Heze, Liaocheng Seismostation, is located in the plains area, for the soil base. Over the past ten years since the establishment of the station, a great deal of local earthquake, near-earthquakes and blasting data have been recorded, reflecting the different recording characteristics of the soil bedrock and lithological bedrock. The main manifestations are the inconsistencies between the first three phases of the P wave and the first earthquake in the basement record of the earthquakes. In this connection, we take the typical records of these three records and analyze the records of the seismic phases of the soil bed.