The huge caldera—6 kilometers in diameter and 1,100 meters deep—formed when Tambora’s estimated 4,000-meter-high peak was removed, and the magma chamber below emptied during the 1815 eruption. Today ...

In April 1815, the eruption of Tambora Volcano in Indonesia — one of the largest in recorded history — blasted ash and gases into the atmosphere purportedly causing widespread cooling and crop ...