A massive (VEI-7) Plinian eruption in 1815 from Mount Tambora on the island of Sumbawa, Indonesia expelled more than 150 km3 (36 cu mi) of volcanic ash around the Earth, causing particularly long, dark and harsh volcanic winters in Eastern Canada from 1816 to 1818.[29] The result of this was the large amount of volcanic ash blocking out the sun's light, causing the Earth's temperature and visibility to decrease.