地震潮汐触发

The tidal triggering of earthquakes

地震潮汐触发是指由潮汐引起的应力变化而触发地震的现象,对地震潮汐触发的研究可能为断层错动引发地震的条件提供有价值的线索,一直受到国内外研究者的关注,本文对相关研究方法和研究结果进行了简要介绍和评述。在早期,地震潮汐触发研究主要是在地震活动中寻找潮汐周期。随着研究的深入,运用统计检验方法对地震活动与潮汐之间的相关性进行严格检验。时至今日,地震是否被潮汐触发的问题仍然悬而未决。不过,有研究结果表明,在强震发生前数年,震源区地震活动往往受到潮汐触发,如果这个结果被证实,将为地震预测研究提供新的线索。

The tidal triggering of earthquakes refers to the phenomenon that the stress change caused by the tide triggers the earthquake.Because the study of the tidal triggering of earthquakes may provide valuable information on the conditions of fault rupture,it has attracted the persistent attention of researchers around the whole world.In this paper,the related research methods and results are briefly reviewed.In the early days,investigation on seismic tidal triggering focus mainly on finding tidal period in seismic activity.As the research goes further,the correlation between seismic activity and tides is tested strictly by statistical test method.Up to now,whether earthquakes are triggered by tides or not is still unanswered.However,some researches show that seismic activity in the focal area is often triggered by tides in several years before a strong earthquake.If it is confirmed,new clues will be provided for earthquake prediction.