摘要
Wecomputedsourceparametersfor143earthquakeswithM_L≥1.0occurringfromJanuary,2011toMarch,2014usingwaveformdatarecordedbytheNuozhaduandJinghongReservoirSeismicNetworks.Then,thevariationofseismicactivityandthecharacteristicsofsourceparametersbeforeandaftertheimpoundmentofthereservoirwereinvestigated.Theresultsshowthat:(1)theseismicactivityincreasedobviouslyaftertheimpoundment,especiallyduringthe3-4monthsafterimpoundment;(2)thefocaldepthsoftheearthquakesoccurringinthereservoirareaareshallowerthantheearthquakesoccurringoutsidethereservoirareaintheinitialstageofimpoundment,butafteratime,thedifferencewasgraduallyreduced;(3)cornerfrequencyvarieswiththeseismicmomentandthelog-linearrelationshipismoreobviousafterimpounding;(4)stressdropandapparentstressincreasewithincreasingseismicmoment,moreovertheyarelowerfortheearthquakesoccurringinthereservoirareaafterimpoundingthanthoseoccurringoutsidethereservoirareaorbeforeimpoundingwiththesameseismicmoment;(5)theeffectofreservoirimpoundmentonanearthquakecanreachadepthof10km,andthemaximumeffectisseenatadepthof3km-6km,andthedifferencesofseismicactivityandaverageapparentstressbetweentheinsideandoutsideofthereservoiraresignificant.
出版日期
2015年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
