Fig. 4

Diagram of the monitored Fluorescence intensity of the thermal water in Baden (B) over the measuring period. The fluorescence intensity at wavelength 470 nm is presented in the blueish curve whereas the greyish curve presents the fluorescence intensity at 525 nm. The orange squares depict the registered earthquakes with the location and the magnitude in brackets. The earthquakes are scaled depending on their precursor manifestation zone, which was calculated by Eq. 1