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FONT-SIZE: 14pt; mso-font-kerning: 18.0pt" lang=EN-US>face="Times New Roman">Statistical Analysis of Earthquake Depth Distribution in fix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />Fujian Region fix = o ns = "urn:schemas-microsoft-com:office:office" />

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摘要

FY: inter-ideograph; TEXT-ALIGN: justify">Based on focal depth data of fix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />Fujian digital seismic network, the authors analyzed 1 431 ML≥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: font-family: 宋体" lang=EN-US>1)the characteristics of focal depths in the region is deeper in the southeast than in the northwest; font-family: 宋体" lang=EN-US>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; font-family: 宋体" lang=EN-US>and 3) the earthquake dynamic cause in Fujian region may be different from the other parts of the China continent. fix = o ns = "urn:schemas-microsoft-com:office:office" />

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