摘要
根据地球内部热状况及震源热力学理论,分析了全球地热带与地震活动带之间的密切关系。指出我国1966年—1988年强震(Ms≥7.0)多发生在地热异常区的边缘(两端和两侧)及两个相近热区之间的地热梯度带。认为区域热流动态的分布特征是地震危险区的重要判别指标之一,与构造活动断裂有关的深井,温泉的温度变化可能是地热异常显示的灵敏“窗口”。
Based on the thermal regime within the earth and thermodvnamical. theory in a focal region, a relationship between geothermal anomalies and seismic activity has been described. It is pointed out that most of the strong earthquakes in China have often occurred either in both ends of a geothermal zone or between 'Cold' and 'Hot' region where the temperature gradient is high. The distributional characteristics of regional heat flow are used as one of the important criteria to evaluate seismic risk region. The preliminary results obtained from lots of temperature anomalies before and after strong earthquakes show that the deep wells and hot springs related with active faults can be considered as a sensitive 'window' of indicating seismogcothermal precursors. Finally, the problems on crustal structure and the depth distribution of seismic focus are also discussed.
出处
《内陆地震》
1990年第1期33-43,共11页
Inland Earthquake
关键词
地热异常
地震活动性
综合分析
Terrestrial heat-flow, Geothermal gradient, Geothermal field
