Radon and geophysics: Recent advances

摘要: Abstract The most recent findings related to earthquake and volcanic eruption prediction by means of radon anomalies analysis are reported. It is first explained how the detailed carefully carried out data obtained before after M6.9 in Reventador, Ecuador, area shows that definite beyond doubt were generated even at rather large distances from epicenter. Both positive negative found. influence groundwater fault networks strongly suggested findings. Regarding soil-air, investigations using additionnal source voluntarily implanted experimental sites show near surface primarily due, if not exclusively, deeper fluids motion acting as transport vectors. Such behaviour likely support pore collapse (PC) model generating an upward carriers. Whatever phenomenon produces fluid has little importance regarding amount available surface. Considering only depth concentration curves, one does expect moderate amplitude for anomalies; which found different Nature. A theoretical devised on basis transient states amounts expected during a short duration prior or eruption. Comparing laboratory field measurement two areas, temperature local output been assessed. shown particularly term variations induced direct correlation with variation counter variation. Eventually, experiments cross checked deep-well have grounwater function depth.