In the Sunda Islands in Indonesia on April 10, 1815 the Tambora Volcano eruption occurred and it was so loud that it could be heard from 3000 miles away in India. The blast ejected 150 cubic kilometers of tephra into the atmosphere, and ash from the eruption was found up to 1300 kilometers away from the volcano. The eruption ash shielded the sunlight causing a global cooling event that was known in 1816 as the year without a summer. This caused crops in Europe to die that in turn caused a widespread famine.The picture below is a satellite view of the Tambora caldera taken in July 2009. The caldera is 6 kilometers in diameter and nearly 1100 meters deep, minor lava flows and steam vents have occurred in recent years but nothing major has happened since 1815.