A Damage Mitigation Strategy with Earthquake Early Warning Based on Evaluation of Their Regional Impacts

Abstract

    The Japan Meteorological Agency (JMA) was started the public service of earthquake early warning (EEW) since October 1st, 2007. The number of earthquakes that EEW was announced since October, 2007 is too limited to evaluate the effectiveness of EEW properly. Therefore, in this research, using the data of the past earthquakes’ occurred from 1923 to 2007, expected lead times before S-waves were analyzed based on the assumption that EEW system had been operated before those earthquakes. In addition, the effect of increasing seismometers in the future was also simulated. Based on the results obtained in both current and future cases, regional characteristics of expected lead times of EEW and their damage mitigation effect in each region were revealed, and future strategies for making the best use of EEW were discussed. [This abstract is not included in the PDF]