A Survey on Use of Earthquake Early Warning by Companies during Great East Japan Earthquake

Abstract

Earthquake Early Warning (EEW) has a possibility to reduce earthquake damages. In this paper, a survey on use of EEW by companies during the Great East Japan Earthquake was conducted to propose strategies for promoting effective use of EEW. The effect of reducing damages due to the Great East Japan Earthquake by using EEW was higher in factories than other facilities of the companies. However, their use of EEW was insufficient because many companies broadcasted EEW inside the buildings only with the higher expected intensity levels. In order to promote the use of EEW, the proper understandings of EEW, cost reduction of receiving devices and increase in accuracy are important. [This abstract is not included in the PDF]