Tunguska anniversary

100 years later, Tunguska remains mysterious

Excerpt:

The explosion near the Podkamennaya Tunguska River on June 30, 1908, flattened some 500,000 acres (2,000 square kilometers) of Siberian forest. Scientists calculated the Tunguska explosion could have been roughly as strong as 10 megatons to 20 megatons of TNT — 1,000 times more powerful than the atom bomb dropped on Hiroshima.

The longstanding theory regarding the cause of the event is a cosmic impact from an asteroid or comet. In the last decade, researchers have conjectured the event was triggered by an asteroid exploding in Earth's atmosphere and measuring roughly 100 feet wide (30 meters) and 617,300 tons (560,000 metric tons) in mass — more than 10 times that of the Titanic.

But recent supercomputer simulations suggest the asteroid that caused the extensive damage was much smaller.

Specifically, physicist Mark Boslough at Sandia National Laboratory in Albuquerque, N.M., and his colleagues say it would have been a factor of three or four times smaller in mass and perhaps 65 feet (20 meters) in diameter. As the asteroid exploded as it ran into Earth's atmosphere, Boslough and colleagues calculate it would have generated a supersonic jet of expanding superheated gas. This fireball would have caused blast waves that were stronger at the surface than previously thought.



Tunguska event

Excerpt:

The Tunguska Event, or Tunguska explosion, was a massive explosion that occurred near the Podkamennaya (Lower Stony) Tunguska River in what is now Krasnoyarsk Krai of Russia, at around 7:14 a.m.[1] (0:14 UT, 7:02 a.m. local solar time) on June 30, 1908 (June 17 in the Julian calendar, in use locally at the time).

The explosion was most likely caused by the air burst of a large meteoroid or comet fragment at an altitude of 5–10 kilometres (3–6 miles) above Earth's surface. Different studies have yielded varying estimates for the object's size, with general agreement that it was a few tens of metres across.


Comment: It will happen again: Revelation 8:10