摘要
通过对北京地区现有定点地震前兆监测网进行清理，分析了现有定点专业前兆监测台站、观测点、群测点的数量及分布密度的现状。对１９９６年１２月１６日北京顺义ＭＳ４．０地震的短临异常特征进行了探讨，表明顺义ＭＳ４．０地震前在震中周围出现一个直径约３５ｋｍ的短临异常密集区域。从异常形态看，该区域中的异常大部分可能带有来自震源的信息。结合顺义地震短临异常点位分布特征，对北京地区前兆台网的密度问题进行了探讨。
In this paper, we have analyzed the numbers, the observation methods and the distribution of the precursory monitoring network in Beijing area. The density of the precursory monitoring network is calculated. We research the characteristics of precursory anomalies before the M S 4.0 Shunyi earthquake. The result shows that there is an anomaly concentrated area of 35 km around epicenter before the earthquake and most items of the anomalies in this area might contain the messages from the source. To the end, we also discuss the monitoring ability of the observational network for earthquake precursors in Beijing area.
出处
《地震》
CSCD
北大核心
1999年第2期209-213,共5页
Earthquake
关键词
前兆异常
地震监测
台网密度
监测能力
地震前兆
Characteristics, Precursory anomaly, Monitoring ability, Observational network
