Here, we present results of the first year of our monitoring study (May 2000 to April 2001). Peaks in the CO2 gas flow rate, the gas composition (helium, methane) as well as in the isotope distribution (3He/4He,15N, 13C) were found. Shifts in the gas and isotope composition are interpreted in connection with seasonal, seismohydrological and magmatic processes. The mineral springs show a seasonal induced correlation be- tween water temperature and CO2 content in the free gas phase. Peaks of 3He/4He ratios at the Wettinquelle and the Plesna mineral spring point out crustal contribu- tions several weeks after the beginning of the period of seismicity. Such a trend we have already found after the 12/1994 earthquake swarm. Each monitoring location is characterized by an isotope 'baseline' signature that reflects the balance of upper mantle-crust interaction. The isotope signature of the 'baseline' flux can change dur- ing opening of crustal reservoir. Long-term trends in Bublak and Plesna (1993 to 2000) of 3He/4He show an all-over increase of MORB-type He which point to active mag- matic processes.