A Study on regional tendency of Earthquake early warning provided to the public in all area of Japan

Abstract

The Earthquake Early Warning (EEW) has started to be provided to the public since October １^st, 2007. After the Great East Japan Earthquake, the number of the warning drastically increased. However, a lot of warnings failed due to the problems of seismometers by power outages and tsunami attacks. In this paper, regional tendency of the broadcasted EEWs was analyzed. The regional difference was observed in the number of EEWs, the probability of their success/failures. A lot of EEWs were broadcasted in the east Japan although EEW has never provided in almost all the west Japan area. Finally, the number of the broadcasted EEW was compared with the results of a questionnaire survey to residents, drastic increase in their perception and receiving experiences of EEW was observed after the Great East Japan Earthquake. [This abstract is not included in the PDF]