frequency-based real-time magnitude estimation for earthquake early warning systems

Earthquake early warning system (eews) is a methodology for providing warning of forthcoming ground shaking during earthquakes. the approach uses a network of seismic instruments to detect the first-arriving energy at the surface, the p-waves, and translate the information contained in these low amplitude waves into a prediction of the magnitude and the peak ground shaking that follows. the instruments closest to the epicenter are the first to detect the seismic energy, and by using a seismic network this information can be integrated to produce a map of future ground shaking everywhere