摘要
使用NCEP提供的气象同化资料,基于逐像元方法分析了2010年2月7日花莲地震前后两个月的地表等压面温度时空变化特征。发现:震前5天在菲律宾板块向欧亚板块移动的前端出现了孤立分布的高温区域,且随着地震的临近,向冲绳海槽和琉球海沟之间的海域移动,增温幅度最高达6℃。此结果与现有的地震热异常时空分布规律一致,表明逐像元方法不仅适用于地形起伏变化较大的内陆地震,在有海岛分布的海洋地震也同样适用。
Using meteorological assimilation data provided by NECP, we analyzed the temporal-spatial variation char- acteristics of temperature on isobaric surface in two months before and after Hualian M6.3 earthquake on Feb. 7 in 2010 basing on per-pixel method. The result showed that there appeared isolated distribution of high-tempera- ture zone in the front-end of Philippine Plate moving to Eurasian Plate in five days before the earthquake. With approaching of Hualian M6. 3 earthquake, the temperature anomaly gradually moved to the sea area between O- kinawa Trough and Ryukyu Trench, and the greatest warming amplitude is as high as 6~C, which coincided with temporal-spatial distribution of thermal anomaly of other earthquakes. It indicated the per-pixel method ap- plied not only to inland earthquakes with great topographic relief variation but also to the oceanic earthquake with island distribution.
出处
《地震研究》
CSCD
北大核心
2013年第1期42-46,141,共5页
Journal of Seismological Research
基金
国家自然基金项目资助"使用多源卫星遥感数据监测震前热异常(41071280)"资助
