地震前红外异常的基本特征与成因机理

通过分析发生在中国及相邻地区的40多次地震的卫星热红外图像,总结了卫星红外临震异常的基本特征。对有关异常成因机理的诸家观点进行了阐述,提出了作的倾向性意见。一般情况下Ms＞5地震前均有较清晰的红外临震异常显示,低空大气－地面增温幅度显,并表现出突发性和阶段性特征。异常面积与震级的大上呈一定程度的正相关。作倾向于认为,临震大气静电异常对大气的极化作用是产生热红外异常的主要原因,异常大气的温室效应也是不可忽视的因素。

THE BASIC CHARACTERS AND FORMATION MECHANISM OF SATELLITE INFRARED ANOMALIES BEFORE STRONG EARTHQUAKES

Analysing thermal infrared anomaly images before earthquakes more than 40 in China and its neighboring areas,the main features of the infrared anomalies are summarized.In general,there exist clearer anomalies with a bigger amplitude of temperature increase which show the character of suddenness and phase before M S>5 earthquakes.Abnormal area is related positively to magnitude with a certain degree.Some studies on mechanism of the infrared anomaly are introduced and the author's trend opinion is put forward.It is believed that the polarizing function of air static electric field anomaly to the atmosphere impending before earthquake should be the major factor to the infrared anomaly.And "the greenhouse effect" of the atmosphere containning abundant "polluting air" should be another factor that can not be ignored.