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

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