Mount Tambora Volcano (Britannica)
The largest volcanic explosion in recorded history was that of Mount Tambora, in Indonesia, in 1815. The volcano is located on the northern coast of Sumbawa island. Before the 1815 eruption, Tambora was about 14,000 feet (4,300 meters) high. However, it lost much of its top during the 1815 eruption. It now stands 9,348 feet (2,850 meters) high. A caldera, or bowl-shaped pit, sits where the top used to be. This massive pit is 4 miles (6 kilometers) across and 4,101 feet (1,250 meters) deep.