Encounters in Human History (ctd)

• August 10, 1972:

  • Fireball over Montana/Wyoming in daylight.
  • Object entered atmosphere at 33,000 mph
  • Remained in atmosphere for 101 s (covering 1000 miles)
  • 33 to 260 feet across
  • Skipped off atmosphere (entry angle)

• Tunguska, Siberia, 1908:

  • 50-m object caused a 20-Mton explosion in the atmosphere (1000 x Hiroshima)
  • 2000 square km of flat trees
  • Even 8km from ground zero devastation dramatic (next)

Notes: