论文部分内容阅读
处理了新疆地区2010~2014年的FY-2E卫星热红外亮温数据。基于构建的亮温背景场资料,对2014年2月12日新疆于田Ms7.3级地震前地表红外亮温的时空分布和演变特征进行了分析。研究发现震前亮温异常主要呈条带状分布于塔里木盆地西南缘和东南缘地区,其位置和走向均与于田地震所处断裂带相吻合;异常出现在2014年1月27日(地震前16 d),一直持续到2月2日(地震前10 d),之后迅速消失;亮温异常十分明显,异常出现时亮温均值相比背景值增幅达8~10 K,异常值增幅可达20 K以上。此次亮温异常现象在时空演变的各个方面均与于田地震具有很好的相关性,亮温背景场资料对于地震异常提取具有一定参考价值。
The FY-2E satellite thermal infrared brightness temperature data from 2010 to 2014 in Xinjiang were processed. Based on the data of the bright temperature background field, the temporal and spatial distribution and evolution characteristics of surface infrared brightness temperature before the Yutian Ms7.3 earthquake in Xinjiang on February 12, 2014 were analyzed. The study found that the anomalous bright anomalies before the earthquake were mainly distributed in the southwest and southeastern marginal areas of Tarim Basin. The locations and trends of the anomalous bright anomalies before the earthquake coincided with the faults located in the Yutian earthquake. The anomaly occurred on January 27, 2014 (earthquake The first 16 days) until February 2 (the first 10 days before the earthquake), then quickly disappeared. The anomalous bright anomalies were very obvious. Compared with the background values, the bright-temperature mean anomalies increased by 8 to 10 K in the abnormal occurrences. Up to 20 K or more. The bright temperature anomaly has good correlation with the Yutian earthquake in all aspects of temporal and spatial evolution. The data of the bright temperature background field is of certain reference value for the anomalous seismic anomalies.