莫力达瓦、嫩江交界5.0级地震长波辐射异常研究  

Outgoing Long-wave Radiation Anomaly Before the Molidawa-Nenjiang M5.0 Earthquake

作　　者：戴勇[1] 高立新[1] 尹战军[1] 王鑫[1] 学峰 张立丰[1] 

机构地区：[1]内蒙古自治区地震局,呼和浩特010010

出　　处：《华南地震》2015年第1期103-106,共4页South China Journal of Seismology

基　　金：震情跟踪课题(2014020401)

摘　　要：通过涡度、时频分析等方法,研究了莫力达瓦、嫩江交界5.0级地震前,震中区域(124.50°E^126.50°E,47.50°N^52.50°N)红外遥感OLR时空分布特征,结果显示:莫力达瓦、嫩江交界5.0级地震前震中区域OLR涡度场存在显著增强的异常现象;震中区格点(125.50°E,49.50°N)OLR涡度值时序曲线在震前存在显著异常变化,其时频结果也显示在地震前存在能量密度增强现象,异常期间谱结构不断变化。Based on vorticity analysis and temporal and spatial analysis, the paper studies the temporal and spatial distribution characteristics of outgoing long-wave radiation in the epicentral region （ 124.50°E -126.50° E, 47.50°N-52.50° N） of the Molidawa-Nenjiang M5.0 earthquake. The results show that： there exist significantly enhanced anomalies of outgoing long-wave radiation vorticity field in the epicentral region before the Molidawa-Nenjiang M5.0 earthquake; secondly, there are significantly short-term anomaly changes in the time- sequence curves of OLR vorticity at grid points （125.50°E, 49.50°N） in the epieentral region before the Molidawa-Nenjiang M5.0 earthquake; thirdly, the time-frequency analysis results of OLR vorticity at grid point of （125.50°E, 49.50°N） with short-time fourier transform method show that there exist energy density enhancement phenomenon before the Molidawa-Nenjiang M5.0 earthquake, and the spectral structure changes during abnormity.

关 键 词：莫力达瓦、嫩江交界5.0级地震 长波辐射 涡度 异常变化 

分 类 号：P315.5[天文地球—地震学]