In June 1908 a huge fireball was seen descending over the Tunguska region of Siberia.It was followed by an enormous blast that flattened more than 2,000 square kilometers of forest.

• 1908年6月，有人目击一团巨大火球坠落于西伯利亚的通古斯卡区域，随后发生的剧烈爆震，夷平了超过2000平方公里的森林。