Mount Tambora is a dormant volcano on the northern coast of Sumbawa island, Indonesia. It is 2,851 metres or 9,354 feet high. It's most violent eruption was on April 1815. The blast caused moderate tsunamis that then caused the deaths of at least 10,000 islanders and destroyed the homes of 35,000 more. Around 80,000 people in the region eventually died from starvation and disease related to the event. Before its eruption Mount Tambora was about 4,300 metres or 14,000 feet high but when it erupted most of the top blew off. Many vulcanologist (scientists who study volcanoes) say that the eruption is the largest in recorded history. It made 100 cubic km of ash and pumice. As this material mixed with gases in the atmosphere, it prevented large amounts of sunlight from reaching Earth’s surface, which lowered the temperature around the world dropped by 3°. The effects were worst in Sumbawa and surrounding islands; many tens of thousands of people perished from disease and famine since crops could not grow. In 1816, parts of the world as far away as western Europe and eastern North America experienced sporadic periods of heavy snow. In italy they had red snow and meanwhile in Hungary brown snow covered the ground.There was also killing frost through June, July, and August. Such cold weather events led to crop failures and starvation in these regions, and the year 1816 was called the “year without a summer.”