Geochemical Monitoring for Earthquake Precursory Research

Geochemical Monitoring for Earthquake Precursory Research

The present investigations aim at developing an effective earthquake precursory system from the long term soil-gas data obtained from a network of soil-gas monitoring. In very recent years, we have established monitoring stations in the Tatun volcanic area(TVG) using Solid State Nuclear Track Detectors(SSNTDs) technique to investigate soil-gas radon-thoron variations to observe the tectonic activity in the Tatun volcanic area of northern Taiwan. As per the present practice, the data from various stations are examined synoptically to evaluate earthquake precursory signals against the backdrop of rainfall and other environmental factors. The present study is also aimed at the appraisal and filtrations of these environmental/meteorological parameters and to create a real-time database for earthquake precursory study. During the observation period of 2014, about 30 earthquakes of magnitude ≥ 5 were recorded and out of these, 10 earthquakes fell under the defined selection criteria and were tested in the proposed model. Out of these 10 earthquakes 7 have been forecasted or shown precursory signals.