Study On New Technology Of Earthquake Early Warning

The earthquake early warning (EEW) system of China is in the stage of testing. It is still facing the common scientific and technological problems such as the problem of magnitude estimation with large uncertainty, the difficulty in quickly identifying rupture parameters and the irrational estimation of the shakemap especially for large events. Moreover, another big challenge for the EEW system of China is the special technical problem of sending tens-millions-level alarm message in sub-second. In order to solve these problems, a project named “Advanced technical development and field demonstration for earthquake early warning” has launched by the Science and Technology Ministry of China. This paper provides an overview of the current situation of EEW system construction and summarizes the key strategies proposed by this project for solving these problems.