We are should believe that magma in the bowels of the earth stored in the pockets of the magma chamber,and has a power source,a very powerful source of energy in the magma chamber,sometimes pressing and forcing magma and other objects to get out into the montains of volcanic,most people call volcanic montain with volcano montain,one volcanic in indonesia that erupted with devastating is krakatau montain,and most activate volcano in indonesia this time is merapi montain is located border between yogyakarta-central java.
Beautiful phenomenon of sunda strait,with the series of islands and krakatau montain,able to present the charm of the main attraction,as well as other volcanoes,though the krakatau montain is beautiful and enchanting,krakatau volcano is one of the volcanoes that has a very dangerous behavior,in the belly of krakatau,store the magma which stuck in the kitchen,and has a very strong pressure becomes larger and can't get out due to blockage held strong,there will be violent eruptions,magma explodes out into surface by releasing millions of cubic meters of rock were mixed embers,ash,dust,sand,and clouds of incandescent violet,its heartbreaking events that occurred in 1883,leaving the data that thunder could be heard more than 4,800 kilometers,and cause tidal wave,which are able to wipe out of life on surrounding islands,especially banten and lampung beaches,krakatau eruption resulted in massive flooding and claimed the lives of above 37,000 peoples.
Besides of eruptions,endogenous energy can also be derived from plate tectonics,the movement of tectonic platescan cause earthquakes and tsunamis as occur in aceh and north sumatera,the tsunami's wave slammed into the mainland and destroy all be passed,the tsunami that occurred in aceh causing more than 170,000 lives was lost,even these,waves hit eleven countries.
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