Statistical Analysis of Earthquake Depth Distribution in Fujian Region

• 责任者：Lin Songjian (Earthquake Administration of Fujian Province ; Fuzhou 350003 ; China) ; Chen Weiwei
• 刊名：Earthquake
• 出版年：2010
• 卷期：30(1)
• 关键词：震源深度 ; focal depth ; 福建 ; Fujian Province
• 页码：p.82-89
• 图表：5 illus., 2 tables, 10 refs.
• 分类号：0500
• issnNo：ISSN1000-3274
• isbnNo：CN11-1893/P

Based on focal depth data of Fujian digital seismic network, the authors analyzed 1 431 M_L≥1.0 earthquakes with focal depth and first class observation accuracy occurred in Fujian Province and vicinities from July 1998 to June 2008. With the meshes of 0.4°×0.4° and the sliding step of 0.2°, the average focal depth in every mesh was calculated, and contour map of average focal depth was plotted. The results can be summarized as follows: 1)the characteristics of focal depths in the region is deeper in the southeast than in the northwest; 2) the isolines are mainly in NE direction. The focal depth is controlled by NW-trending structure and relatively deep in fault structure areas in the southern; and 3) the earthquake dynamic cause in Fujian region may be different from the other parts of the China continent.