Mount Sorik Marapi entry classification type A, is geographically located the position of 0o 40 ’27 “North Latitude 99o 30′ 24” east longitude with a peak height of about 2145 m above sea level. This volcano is monitored from the Post in the PGA Village Sibangortonga, District Pucuk Sorik Marapi, Mandailing Natal regency. Eruptive activity Mount Marapi Sorik last recorded in 1971 ash eruption. In normal conditions, the number of recordings Volcanic Earthquake In (VA) less than 10 occasions per…