Tunguska. western Siberia
June 30, 1908
hundreds of square miles of forest
heard in London
5700 km away
orange glow in sky for days
read newspaper at night in Europe (?)
speculation it was a meteorite, exploded above surface. No material found.
Trees flattened for about 20 miles around. Trees standing at epicenter.
knocked over an estimated 80 million trees over 2,150 square kilometres (830 square miles). - wikipedia Likely meteorite 5-10 km above.