文安地震前天体引潮力和NCEP的异常现象  

Abnormal Phenomenon of NCEP and the Astro-tidal-triggering

作　　者：周波[1] 张正煜[2] 瞿有田[1] 马未宇[1] 

机构地区：[1]浙江师范大学数理信息学院,浙江金华321004 [2]甘肃省环境保护局,甘肃兰州730030

出　　处：《地理信息世界》2009年第1期67-70,共4页Geomatics World

基　　金：国家自然科学基金项目资助(40172101)

摘　　要：利用天体引潮力对地震诱发作用计算模型和NCEP遥感数据提取异常增温信息,分析2006.7.4发生在我国河北文安Ms5.1级的地震原因。研究结果表明:此次地震发生在天体引潮力达到峰值时段,天体引潮力对地应力处于临界状态的活动断层具有明显的诱发作用;增温异常图像呈现出震前异常增温经历:起始→加强→高峰→衰减→平静的演变过程,该过程反映地震构造由初始微动→破裂→扩张破裂→应力积聚→地震爆发→平静的一般过程。According to the fluctuation in time which extracted from astro-tidal-tfiggering model, the paper used the data of NCEP （National Centers for Environmental Prediction） to analyze the temperature abnormal increase before the Ms5.1 earthquake that occurred in Wen＇an, Hebei province of China on July 4, 2006. The result indicated that the astro-tidal-triggering has a triggering effect on the activity of a fault only at the time when the terra stress is in critical status. Meantime, the images of the temperature abnormal increase can clearly reflect the procession of the seismic fault activity in Wen＇an： initial temperature rise→ enhancement→ reaching peak→attenuation→return to baseline, and the evolution of abnormal temperature changing maybe indicate the fault activities under tectonics Stress： tectonic movement extrusion →rock micro-breakage →rock breaking enhancement →energy accumulation→shaking→tranquil.

关 键 词：天体引潮力 异常增温图像 短临地震 文安 

分 类 号：P312.4[天文地球—固体地球物理学]