iaspei standard seismic phase list

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1、IASPEISTANDARDSEISMICPHASELIST(DRAFT)AtitsmeetinginHanoi,August23,2001theIASPEICommissiononSeismologicalObservationandInterpretationdecidedtosetupaWorkingGrouponStandardSeismicPhaseList.ThefinalproductoftheWGissupposedtoberecommendedbytheIASPEIforuseindataexchangebetweenseismicobservatories,l

2、ocal,regional,andinternationaldatacentres.ThemembersoftheWGare(inalphabeticalorder):R.Adams,P.Bormann,R.Engdahl,J.Havskov,B.Kennett,J.Schweitzer,andD.Storchak(Chairman).Pleasesendyourcomments/suggestionstodmitry@isc.ac.ukCRUSTALPHASESPgAtshortdistances,eitheranupgoingPwavefromasourceintheuppe

3、rcrustoraPwavebottomingintheuppercrust.AtlargerdistancesalsoarrivalscausedbymultipleP-wavereverberationsinsidethewholecrustwithagroupvelocityaround5.8km/s.P*(alt:Pb)EitheranupgoingPwavefromasourceinthelowercrustoraPwavebottominginthelowercrustbelowtheConraddiscontinuity(Conrad)PnAnupgoingPwav

4、efromasourcebetweentheMohorovicicdiscontinuity(Moho)andthebaseoftheasthenosphereoranyPwavebottomingintheuppermantlenotdeeperthanthebaseoftheasthenospherePnPnPnfreesurfacereflectionPgPgPgfreesurfacereflectionPmPPreflectionfromtheoutersideoftheMohoPmPNPmPmultiplefreesurfacereflection;Nisapositi

5、veinteger.Forexample,PmP2isPmPPmPPmSPtoSreflectionfromtheoutersideoftheMohoSgAtshortdistances,eitheranupgoingSwavefromasourceintheuppercrustoranSwavebottomingintheuppercrust.AtlargerdistancesalsoarrivalscausedbysuperpositionofmultipleS-wavereverberationsandSVtoPand/orPtoSVconversionsinsidethe

6、wholecrust.Themaximumenergyofthiswavetravelswithagroupvelocityaround3.5km/sandiscalledLg.S*(alt:Sb)EitherupgoingSwavefromasourceinthelowercrustoranSwavebottominginthelowercrustbelowtheConradSnAnupgoingSwavefromasourcebetweentheMohoandthebaseoftheasthenospereoranySwavebottomingintheuppermantle

7、notdeeperthanintheasthenosphereSnSnSnfreesurfacereflectionSgSgSgfreesurfacereflectionSmSSreflectionfromtheoutersideoftheMohoSmSNSmSmultiplefreesurfacereflection;Nisapositiveinteger.Forexample,SmS2isSmSSmSSmPStoPreflectionfromtheoutersideofthe