RADON MONITORING RELATED TO A SUBDUCTION ZONE IN MEXICO

A radon in soil monitoring network has been set-up along the Mexican P acific Coast, adjacent to the Mesoamerican trench, in order to observe the radon emission fluctuations associated with the pre, co and post seismic phases of future large earthquakes occurring along the Guerrer o seismic gap during the next 10 years. Radon determination has been s ystematically performed with SSNTD exposed in the field for periods of one month. Results from radon in soil fluctuations, from stations loc ated along the Guerrero seismic gap, have shown a behaviour possibly a ssociated with changes in environmental factors and local seismicity. The use of automatic continuous radon detection devices is proposed as an additional methodology for network surveillance purposes.