地震学报（英文版）2004，Vol.17Issue(z1)：61-66,6.
Statistical property of candidate earthquake precursors and its apparent focal mechanism dependence
Statistical property of candidate earthquake precursors and its apparent focal mechanism dependence
摘要
Abstract
Statistical properties of reported earthquake precursors show apparent focal mechanism dependence. Intensity of anomaly is described by the 'anomaly ratio' as defined by the number of stations/items reporting anomalies before the target earthquake over the number of stations/items in operation around the target earthquake. Variation of the 'anomaly ratio' with the magnitude of the target earthquake was studied for dip-slip earthquakes all over China,strike-slip earthquakes in eastern China, and strike-slip earthquakes in western China, respectively. It is observed that for strike-slip earthquakes, the 'anomaly ratio' increases linearly with the magnitude of the target earthquake,while earthquakes in eastern China and western China have different slopes. For dip-slip earthquakes, however, the 'anomaly ratio' has no statistically significant change with the magnitude of the target earthquake. Limited data imply that the 'anomaly ratio' seems proportional to the apparent stress of the target earthquake. The result might be heuristic for the analysis of candidate earthquake precursors.关键词
earthquake precursor/focal mechanism/apparent stressKey words
earthquake precursor/focal mechanism/apparent stress分类
天文与地球科学引用本文复制引用
吴忠良,王林瑛..Statistical property of candidate earthquake precursors and its apparent focal mechanism dependence[J].地震学报（英文版）,2004,17(z1):61-66,6.基金项目
National Natural Science Foundation of China (40274013) and MOST Project (2001BA601B02). （40274013）
