3.The structure,earthquake and tsunami information detection,tsunami warning bulletin issue of the International Tsunami Warning System(ITWS) are introduced briefly in this paper,and the Pacific Tsunami Warning Center (PTWC) and the Alaska Tsunami Warning Center(ATWC) are also introduced.
13.The structure, earthquake and tsunami information detection, tsunami warning information issue of the Destructive Earthquake and Tsunami Warning System(DETWS) in Portugal are introduced briefly in this paper.