2018年青海称多MS5.3地震前热红外亮温异常分析及预测回顾  

Review of thermal infrared brightness temperature anomalies and prediction of the 2018 Chengduo, Qinghai MS5.3 earthquake

作　　者：张丽峰 孙玺皓[1,2] 马茹莹 赵玉红[1,2] 胡维云 ZHANG Lifeng;SUN Xihao;MA Ruying;ZHAO Yuhong;HU Weiyun(Golmud Geodynamics Field Observation and Research Station of Qinghai—Tibet Plateau,Xining 810001,Qinghai,China;Qinghai Earthquake Agency,Xining 810001,Qinghai,China)

机构地区：[1]青海格尔木青藏高原内部地球动力学野外科学观测研究站,青海西宁810001 [2]青海省地震局,青海西宁810001

出　　处：《地震工程学报》2023年第1期153-160,共8页China Earthquake Engineering Journal

基　　金：青海格尔木青藏高原内部地球动力学野外科学观测研究站专项;2020年度震情跟踪定向工作任务(2020010418,2020010419);青海省地震科学基金(2020B01)。

摘　　要：以卫星热红外亮温资料为数据基础,采用小波变换和功率谱估计法,分析2018年称多地震前的热红外亮温异常,并对预测过程进行回顾总结。结果表明:称多地震前的热红外亮温异常演变表现为出现、增强、减弱、消失4个阶段,异常呈条带状分布且与断层走向基本一致,描述异常的一些特征参数均在以往震例研究结果的参考范围内;类比同地区其他震级相当地震的热红外亮温异常情况,发现称多地震前出现的热红外亮温异常可能与其是双震型地震有关;称多地震的预测过程总结为分析-判定-预测-检验4个阶段,可为区域震情判定提供新的经验。On the basis of thermal infrared data from China’s geostationary meteorological satellite, the wavelet transform and power spectrum estimation method were used in this study to analyze thermal infrared brightness temperature anomalies before the 2018 Chengduo earthquake, and the prediction process was reviewed and summarized. Results showed that the evolution of thermal infrared brightness temperature anomalies before the Chengduo earthquake was characterized by four stages: emergence, enhancement, weakening, and disappearance. The anomalies were distributed in strips and were basically consistent with the fault strike. Some characteristic parameters describing the anomaly were within the reference range of previous earthquake cases. Comparison with the anomalies in the thermal infrared brightness temperatures of other earthquakes with similar magnitudes in the same region revealed that the anomalies before the Chengduo earthquake may be related to the double earthquake type of the Chengduo earthquake. The prediction process of the Chengduo earthquake is summarized as the four stages of analysis-judgment-prediction-test and can provide a new experience for the determination of regional earthquake situations.

关 键 词：热红外 亮温异常 称多地震 双震型地震 

分 类 号：P315[天文地球—地震学]