Abstract
Radon is one of the precursory phenomena that exist in connection to the occurrence of earthquakes and may have potential in forecasting these hazards. The data set in this study contains the observations of radon from August 01, 2014, to January 31, 2015, collected in Sobra city, northern Pakistan. Weibull, gamma, log-normal, log-logistic, and Pareto probability distribution were fitted over the radon on its original scale and a log scale. Log-logistic best fits the radon on both scales. The Tukey control charts reveal several anomalies that were compared with earthquake occurrence. There are five earthquakes that occurred during the same period as the radon monitoring program, having magnitude ranges between 4.9 and 5.5, with the ratio between strain radius and distance to the epicenter greater than or equal to 1. The results of this study demonstrate that, for earthquakes, seismic events show a correlation with increasing concentrations of radon gas before their occurrence.
Highlights
Earthquakes are natural disasters that strike so suddenly and cause damage on a larger scale
Vaupotic et al [9] have studied the radon concentration in soil and rate of exhalation of radon at the Ravne Fault in NW Slovenia by calculating the concentration of radon in soil gas, rate of radon emission from the ground, permeability of soil, and gamma dose rate in the above-said region. e acquisition was done with the help of an Alpha Guard radon monitor and Gamma Tracer for radon in soil gas and gamma dose. e study concluded that the values of radon concentration and radon exhalation were lower as compared to other areas of Slovenia and there was not an increasing trend in the data because the investigation sites were a little bit far from the fault and were perpendicular in direction
Data Description. e radon (0 − 10 mega Bq/m3 ) dataset in this study was obtained from the earthquake station located in Sobra city, Pakistan, using Sarad RTM 2200 analyser [8]. e time span covers the six months i.e., from 1st August 2014 to 31st January 2015. e continuous monitoring [22] method with one sample every 15 minutes was used. is dataset is held by the Centre for Earthquake Studies, National Centre for Physics (NCP), Islamabad https://www.ncp.edu.pk/ces.php
Summary
Earthquakes are natural disasters that strike so suddenly and cause damage on a larger scale. Vaupotic et al [9] have studied the radon concentration in soil and rate of exhalation of radon at the Ravne Fault in NW Slovenia by calculating the concentration of radon in soil gas, rate of radon emission from the ground, permeability of soil, and gamma dose rate in the above-said region. E study concluded that the values of radon concentration and radon exhalation were lower as compared to other areas of Slovenia and there was not an increasing trend in the data because the investigation sites were a little bit far from the fault and were perpendicular in direction. Active as well as passive techniques were used for measuring the concentration of radon in soil gas and thermal waters. Solidstate nuclear track detectors (LR-115) were used to measure the radon concentration in soil and thermal water fields
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