Earthquake precursor observation device and method

An earthquake precursor observing device for observing an earthquake precursor based on actually measured earthquake data, comprising:

• a data acquisition module which acquires earthquake data actually measured at a plurality of observation points;
• a pulse calculation module which acquires information of a propagation environment where seismic waves propagate from a hypocenter of an earthquake to each of the observation points, and applies time reversal processing on the seismic waves received at the plurality of observation points by considering the propagation environment to acquire time reversal pulses at each of the observation points;
• a line calculation module which calculates a parametric line in a length direction of a fault from a distribution of azimuths of frequency spectra of the time reversal pulses acquired by the pulse calculation module;
• a head searching module which searches a parametric head by analyzing the seismic waves received in the vicinity of the parametric line calculated by the line calculation module;
• and
• a monitoring module which monitors developments of a crack in the fault by observing the parametric head searched by the head searching module.