摘要
将安徽及邻区(29°～36°N,114°～124°E),按1°×1°分成70个区,依据中国地震局分析预报中心编制的1998年1月1日至2003年12月31日全国地震月报目录,采用单事件多台观测资料,在所分区域里进行平均波速比值的计算,结果在其空间分布图像中显示了一定的特征.这些特征可能与地质构造环境即地质构造所形成的断裂带两侧的介质特性差异有关.计算所得的各区平均波速比对以后波速比值的变化分析有一定的参考作用.
Dividing Anhui Province and surroundings into 70 small grid (1°×1°),according to the monthly earthquake catalog of from.1998.1.1 to 2003.12.31 made by China Earthquake Administrator Analysis and Prediction Center(APC),we have calculated the average V_P/V_S ratio in the small grid by use of the phase data of a single event recorded by the network.Its spatial distribution image had indicated some certain features.These features may be related to geological structure environment,i.e. the medium flanked fracture zone formed by geological structures.These average V_P/V_S ratio of each area may be a reference to analyze the variation of V_P/V_S ratio.
出处
《地震地磁观测与研究》
2005年第1期22-27,共6页
Seismological and Geomagnetic Observation and Research
关键词
平均波速比
地质构造环境
断裂带
average wave velocity ratio,geologic structure environment,fault zone
