2.The structure,earthquake and tsunami information detection,tsunamiwarning bulletin issue of the International TsunamiWarningSystem(ITWS) are introduced briefly in this paper,and the Pacific TsunamiWarning Center (PTWC) and the Alaska TsunamiWarning Center(ATWC) are also introduced.
3.The structure, earthquake and tsunami information detection, tsunamiwarning information issue of the Destructive Earthquake and TsunamiWarningSystem(DETWS) in Portugal are introduced briefly in this paper.