福建连城5级地震与构造的关系分析

AN ANAL YSIS ON THE RELATIONSHIP BETWEEN THE LIANCHENG M5.0 EARTHQUAKE IN FUJIAN AND GEOLOGICAL STRUCTURE

摘要:

1992年11月26日在福建连城发生了5.0级地震,宏观震中位于黄地-赖源-带(116°57'E,25°32'N),震中烈度Ⅵ度强,震源深度7-8km。极震区等震线呈椭圆形,长轴方向为NE,与震中区的黄地-梅村头断裂展布方向基本一致,余震沿该断裂分布,并自NE向SW方向迁移。黄地-梅村头断裂可能是这次地震的发震构造。

Abstract:

A M5.0 earthquake occurred in Liancheng on Nov.26,1992.The macroscopic epicenter is situated between Huangdi and Laiyuan(116°57'E,25°32'N),epicentral intensity is Ⅵ⁺,focal depth is about 7.5 km,The is oseismal map of meizoseismal region shows oblong,Its long-axis strike is NNE,which is same as the that of the Huangdi-Meicuntou fault in epicentral area. The aftershocks were distributed along the fault and migrated from NE to SW. Tt is considered that the Huangdi-Meicuntou fault might be seismogenic structure of this earth-quake.