Investigation and measurement of Radon gas concentration in soil air overlying of Quchan Fault

In this study, we tried to radon gas efficiency, as one of the signs before the earthquake are examined. Ghoochan fault activity in the past has been associated with large earthquakes, the results of which have brought a lot of damage. In order to check the activities and emission of radon fault, the fault Ghoochan as well as seismic activity survey to determine the emission of radon was chosen direction. After preliminary studies, depending on parameters such as population density in some parts of the fault, Then, summing up the results of the fault which has the highest population density and seismic risk is Choose and to determine emission of radon in the fault zone was studied. When were determined that due to the type and texture of soil gradation balance is not deep fault zone access. So continue sampling depth is limited to 0.5 meters above soil level. The following zoning exposure to radon in soil samples 75 points determine the portion of the fault zone. Payam Mashhad analyzed in the environmental laboratory and the results are presented in a separate analysis. The results of this study showed that: the fault between the output of large quantities of radon 67-11260) Bq/m3(Ready great earthquake. And also on the part of the fault zone was possible.