Decomposition of continuous soil–gas radon time series data observed at Dharamshala region of NW Himalayas, India for seismic studies

Soil–gas radon time series data has been generated at Dharamshala station for seismic studies in NW Himalayas, India. Compared with the influence of temperature and pressure, radon and rainfall have shown a strong correlation. Decomposition of radon time series into three component series (seasonal, trend, and residual) has been done for further recognizing the authentic anomalous values. The irregular patterns in daily and residual radon data have been associated with earthquake events and rainfall. This monitoring station found to be sensitive to the seismic events within a distance of about 70 km.