Data concerning Radon emission in waters filling mud volcanoes of Northern Apennines (Northern Italy) sampled from 1986 until 1989 have been analyzed. Possible connections between shallow environmental conditions and Rn emission from mud volcanoes have been explored. A linear relationship between air temperature and Rn count rates has been determined. After the removal of temperature related Rn variations, a significant correlation has been pointed out between anomalous spike-like Rn emissions at one of the station considered and the occurrence of low magnitude (M<4.5) local earthquakes. ¿ American Geophysical Union 1995