Thermal convection in the porous methane-soaked regolith in Titan: Finite amplitude convection

► In some regions of the Saturnian satellite Titan the regoligh is soaked with liquid. ► We found that 'geothermal' heat flow could drive thermal convection is this liquid. ► We investigate properties of this convection. ► It leads to hydrothermal activity, that could be important for thermal state of Titan interior.