Mount Tambora is located in a peninsula of the island of Sumbawa, Indonesia. Mount Tambora was formed by the active subduction zone of the North and South oceanic crust. Mount Tambora is 4,300 meters (14,100 ft.) tall.
On April 10,1815, Mount Tambora erupted and is considered one as of the largest volcanic eruptions recorded in history. The eruption was heard on Sumatra island which is about 1,200 miles away! This distance is equivalent from Atlanta, Georgia to Mexico City. Could you imagine hearing a volcanic eruption from that distance??!!
Many deaths from the eruption were caused by starvation and disease because the eruption ruined agricultural activity. The death toll is approximately 71,000 people and of those people, 11,000-12,000 were killed directly by the eruption.
The eruption caused global climate abnormalities commonly known as the "Volcanic Winter" because of the effect on North American and European weather. Crops failed and livestock died in much of the Northern Hemisphere resulting in the worst famine of the 19th century.
How did this atmospheric change happen? Well, in when Mount Tambora erupted, gases, ashes and dust arrived over the Iberian Peninsular and reached the stratosphere, where they remained long enough to create "an enormous sun filter". It is astounding that the eruption happened in April of 1815, but the effects of the explosion did not effect the Northern hemisphere until the summer of 1816. The summer of 1816 will always be known as the "Year Without Summer".