Earthquake Early Warning Technology Progress in Taiwan
Kuo-Liang Wen *1,2,3, Tzay-Chyn Shin*4, Yih-Min Wu*5, Nai-Chi Hsiao*4, and Bing-Ru Wu*1
*1National Science and Technology Center for Disaster Reduction, Taiwan
*2Institute of Geophysics, National Central University, Taiwan
*3National Center for Research on Earthquake Engineering, Taiwan
*4Central Weather Bureau, Taiwan
*5Department of Geosciences, National Taiwan University, Taiwan
The dense real-time earthquake monitoring network established in Taiwan is a strong base for the development of the earthquake early warning (EEW) system. In remarkable progress over the last decades, real-time earthquake warning messages are sent within 20 sec after an event using the regional EEW system with a virtual subnetwork approach. An onsite EEW approach using the first 3 sec of P waves has been developed and under online experimentation. Integrating regional and onsite systems may enable EEW messages to be issued within 10 sec after an event occurred in the near future. This study mainly discusses the methodology for determining the magnitude and ground motion of an event.
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