45+ Before And After Map Before And After Mount Tambora Images. In 1815, perhaps 50,000 people lived on sumbawa, a beautiful land of rushing streams, gentle hills, and thick jungles. Mount tambora experienced several centuries of dormancy before 1815, caused by the gradual cooling of hydrous magma in its closed magma chamber.
In april 1815, a volcano called mount tambora exploded and killed an estimated 10,000 people in indonesia.
Now imagine what the skies must have looked like after the eruption of mount tambora. For two hours, a stream of lava erupted from mount tambora, the highest. Before the explosion, mount tambora was approximately 4,300 m (14,000 ft) high, one of the tallest peaks in the indonesian archipelago. It has been estimated that mount tambora stood approximately 12,000 feet tall before the 1815 eruption when the top third of the mountain was completely obliterated.