RADIO DIRECTION FINDING, A NEW METHOD FOR THE INVESTIGATION OF PRESISMIC PHENOMENA. THE CASE OF JAPAN

This study the LTPA Emission Project Team presents a new method of detecting electromagnetic signals that is a candidate for the analysis of seismic precursors and for a crustal diagnosis in real time. Earthquakes are an expression of the Earth System and is therefore clear that the anlysis of data must be evaluated in a holistic context, supported by advanced technologies and by the constant and rapid synergy with the scientific community thanks to the web. The RDF experimentation proposed in this paper is based on some precursor candidates, such as a magnetic anomalies and particular frequency bands, activated by the minerals of the rocks under tectonic stress. The monitoring station, localted in Rome and Pisa (Italy), used two types of radio receivers to continuosly monitor the electromagnetic spectrum located between the lower limit of the SELF band (Super Extremely Low Frequency) and upper limit of the VLF band (Very Low Frequency). In this study, as a demonstrative example, the seismicity in Japan is analyzed, as detected by the Italian monitoring stations.