A analysis system for comparing the performance evaluation of the earthquake early warning system

The first stage of the Korean Earthquake Early Warning System has been operated at the Korea Meteorological Administration (KMA) for January 2015. The goal at this stage was to issue a warning within 50 seconds of detecting an earthquake of magnitude 5.0 or more. In the two years and a half since operations started, three warnings have been issued, for an offshore earthquake of magnitude 5.0 that occurred on 5 July 2016 and magnitude 5.1 and 5.8 earthquakes occurred in the southeastern Korean Peninsula on 12 September 2016. Since operations began, all local earthquakes of magnitude 3.0 or greater have been detected with sufficient accuracy.This study introduces a analysis system for comparing the performance evaluation of event analysis results between the earthquake early warning system (EEWS) and the KMA catalog.Main functionalities of the system are: real-time event acquisition from the EEWS like location, magnitude, associated stations etc, and near real-time event acquisition from the KMA catalog. The main comparing factors are time, location, magnitude difference between KMA and EEWS to compare each events, to show the location of events on the map and the detection ratio of the EEWS. And also we can see the more detailed information of the event that is how many stations are associated or not, horizontal peak ground acceleration of the all stations. and this system shows the elapsed time that how many stations are associated and magnitude to the event at that time.It makes easier to compare the event between KMA and EEWS and to visualize in more detailed result of the analysis and easy to find out what is the reason of some poor locating and magnitude quality.