Foralongtime,aquantitativecalculationofenergyradiatedbyseismicwaveshasbeenanimportantprobleminthebasicstudyofseismology.Uptonowthewell-knownrelationshipoflgE=l.5MS+11.8createdbyGutenbergandRichter(1956)hasstillbeenabetterexperientialstatisticalrelationforestimatingtheenergyofseismicwaves.Sincethecreationofseismicdislocationmodelinthe1960s,seismologistshavestudiedaquantitativecalculationofenergyradiatedbyseismicwaves.Forexample,Haskell(1964),VassilionandKanamori(1982),CHENandDuda(1993b)haveacquiredmanycreativeresults.Especiallysincethe1980s,digitalseismometerswithlargedynamicrange,widebandandhighprecisionusedinseismicmonitoringandusageofprocessingtechnologyofdigitalcomputerhavegreatlyexploitedthestudyfieldofmoderndigitalseismology.OnthebasisofseismicdislocationmodeldevelopedbyBrune(1970),anewseismicwaveradiatedenergyrelationdependedonseismicmoment,ambientstress(0andpeakgroundmovementhasbeenestablished.DataobservedbymobiledigitalseismometerintheYao(anM=6.5earthquakeonJanuary15,2000anditsaftershocksequenceareusedtoestimateseismicradiatedenergy.Furthermore,wealsodiscusstheambientstress(0andcharacteristicsofenergyattenuationfortheaftershocksequence.
