Mal was zur Energie:

Wenn ich mich niht verrechnet habe, beträgt die Masse 21 Milliarden Tonnen , die kin. Energie ca. 1,7e22 Joule, ohne relativistische Effekte.

Annahmen: 10km duchmesser, 40km/s, Dichte 5t/cbm, keine relativistischen Effekte.

die NASA glaubt. Zitat:

“A report from Elizabeth Silber and Peter Brown at the University of Western Ontario indicates that several international very-long wavelength infrasound detectors recorded the blast and fixed the position near the coastal city of Bone in South Sulawesi, island of Sulewesi. They note that the blast was in the 10 to 50 kT range with the higher end of this range being more likely.

Assuming an estimated size of about 5-10 meters in diameter, we would expect a fireball event of this magnitude about once every 2 to 12 years on average. As a rule, the most common types of stony asteroids would not be expected to cause ground damage unless their diameters were about 25 meters in diameter or larger.”

Quelle: NASA Near Earth Object Program News vom 23.10.09