Sikhote-Alin Iron Meteorite
Location: Sikhote-Alin Mts., SE Russia
Structural Class: Coarsest octahedrite, Widmanstatten bandwidth 9.0 ±5.0mm
Chemical Class: Group IIB, 5.9% Ni, 0.42% Co, 0.46% P, .28% S, 52 ppm Ge, 161 ppm, Ge, 0.03 ppm Ir
Time of Fall: Feb. 12, 1947, 10:38 a.m.
Witnesses reported a fireball traveling across the sky that was brighter than the sun. It left a trail of smoke and dust 20 miles long that lingered for several hours. The light and sound of the fall were observed for two hundred miles around the point of impact. The speed of entry was estimated to be 31,100 mph. When the descending fragments reached an altitude of about 3.5 miles (about half the altitude passenger jets fly), the largest mass broke up in a violent explosion. A total estimated mass of 1000 tons of iron meteorite scattered over an elliptical area of about half a square mile, creating small craters and pits. One crater measured 85 feet across and 20 feet deep.