Cumulated mass deposited on the QCMs retrieved after the isotherm filtering, i.e., on selected data points that were acquired when the QCM is at its most frequent temperature +/−0.75 °C. Cumulated masses are fitted by continuous spline curves. The curves show a relevant mass deposition increase on QCM1 and QCM5, in particular around perihelion of 67P (13 August 2015). No dust mass increase is detected byQCM2 and QCM4, while a slight increase in QCM3 is limited to perihelion. In the bottom panel we report the variation of the S/C distance from the comet and the phase angle (spacecraft-comet-Sun) that could influence the dust flux. No clear correlation is visible. A dust flux increase is visible for QCM5 at the end of the mission, which is associated with the outburst that occurred on 5 September 2016, when the S/C was at about 5 km from the nucleus surface of 67P.