对四川芦山地震前1个月内的FY-2卫星云图与红外亮温数据分析发现,震前3d即4月17日的06:30—09:30,在青藏高原东部出现延展达数百千米的两条线性云,两者延伸交叉处正是芦山地震的震中位置。通过与汶川Ms 8.0级地震前数小时出现的线性云异常进行比较,认为龙门山断裂带强震前屡次出现的“无中生有”线性云异常现象,可能与青藏高原东部地下未知的隐伏构造及油气赋存有关,具有一定的临震指示性,应该作为该地区地震遥感监测的重点。今后,在全球综合地球观测系统(GEOSS)大数据的支持下,考虑孕震过程中的地球系统多圈层作用与耦合效应,将开展遥感多参数异常时空特征及其关联性分析,为解开该地区的线性云异常之谜提供科学依据。

The analysis of the FY-2 satellite cloud images and the infrared radiation brightness temperature data within a month before Lushan earthquake discovered that there were two linear clouds with length of hundreds of kilometers, which developed along the eastern edge of Tibet Plateau at 06:30-09:30am on 17 April, 2013, 3 days before Lushan earthquake. The earthquake epicenter of Lushan earthquake was just located at the intersection point of these two linear clouds extension. As compared to the linear cloud anomalies occurred a few hours before Wenchuan Ms 8.0 earthquake, we suggested that the abrupt occurrences of linear clouds before strong earthquakes in Longmenshan faults region might be related with some unknown hidden structures and underground petroleum resources in the eastern edge of Tibet Plateau. The linear clouds had omens meaning for coming earthquake, which should be taken as a key point of satellite remote sensing monitoring. Subsequently, with the support of big data from GEOSS, and in consideration of the interaction between the multiple spheres of earth system and coupling effect in seismogenic process, we will analyze the spatio-temporal features and the relations of multi-parameters from remote sensing, so as to provide scientific foundations for uncovering the enigma of abnormal liner clouds in this region.