the upper slope of mount lawu

forest hill vegetation mountain jungle ridge valley plateau wilderness tree terrain trail cliff landscape upper slope mount lawu gunung massive compound stratovolcano straddling border east java central indonesia north side deeply eroded eastern parasitic crater lakes cones fumarolic area located south flank 550 reported activity place 1885 rumblings light volcanic ash falls study insights geothermal heat flow suggesting still active today indonesia cones reported mt today