Signal processing and sonification of seismic electromagnetic radiation in ELF band

We develop a signal processing method appropriate for detecting electromagnetic radiation due to the earthquake activities. The radiation is usually accompanied by a background noise that is mainly caused by atmospheric discharges in the tropical regions. Data representing the seismic radiation is presented as sound via the concept of sonification. This is useful to immediately find out anomalous seismic radiations, which are often followed by a disastrous earthquake, from massive data collected from over forty observation stations, It is illustrated that the auditory display is worth for the future earthquake prediction system.