Semeru volcanic complex is basalt-andesite composite volcano in east java. the volcano consist of two cones namely old semeru (Mahameru) and young semeru. Mahameru products consist of pyrocclastic flows, pryroclastic falls and lahar deposit. Semeru eruptives are produced from summit and flank eruptions. The product composed of basalt-andesite lavas, pyroclastic falls, pyroclastic flow, lahar an…