The Sunda Arc is home to some of the world 's most dangerous and explosive volcanoes . The 1815 eruption of Mount Tambora on Sumbawa and the 1257 eruption of Mount Samalas on Lombok were among the largest in the last two millennia , ranking 7 on the VEI scale . The Sunda Arc subduction zone was also the site of one of the largest known eruptions of the Cenozoic , the VEI 8 Toba supereruption on Sumatra , which expelled 2,800 km ³ of magma c. 74,000 BP . The resulting caldera has become Lake Toba . The loudest noise in recorded history occurred during the 1883 eruption of Krakatoa and was heard away . Hundreds of thousands of people have been killed by these eruptions and by episodes of activity at other volcanoes , including Papandayan , Galunggung , Merapi , Kelud , and Agung
1883 eruption of Krakatoa
1883 eruption of Krakatoa
Sunda Arc