History and Operation of Early Warning Systems Throughout the World

The existing earthquake early warning systems estimate the location and magnitude of earthquakes and then earth movements at a site are estimated as a function of the epicentral distance and soil properties of the site. In the past two decades we have seen a raPid development of methods for earthquake early warning systems. This review study was focused on an earthquake early warning system considering fault limitation. also systems with rupture geometry estimate and slip size on a limited fault in real time were described for earthquake early warning system. In some systems, a method for estimating an earthquake fault dimensions in real time is done by classifying seismic records into near and far source. Peak earth movements were analyzed and used Bayesian model to find a function which can classify near and far source records in the best way based on these parameters. The diagnostic function is useful for estimating fault rupture dimensions in real, especially for large earthquakes. An analytical function for estimating slip on the fault result from near-source earth movement observations is constructed and used.