Meteorite hits Cuba

originally posted by: 727Sky
The earth or a city is going to hit one day by something that does more than break a few windows and it could happen any day at anytime.

If it's a planet killer, I want to be right in the middle of the impact zone.

a reply to: Blue Shift

Meteors are divided onto several different classes

Stony - basically silicate rocks, similar to what find on earth

Stony - irons - Stony with bits of iron-nickel through, like raisins in pudding

Iron-nickel - Solid iron lumps , about 90 % Iron, with rest Nickel and small amounts Cobalt

Carbonaceous - Carbon , hydrocarbons like asphalt, with some organics

Ice - frozen water, bits from comets

Stony are most common

Depending on material the meteor is composed of there is a size limit on how big the object has to be to penetrate
the atmosphere without exploding

The Chelyabinsk meteor (asteroid ?) which exploded in the atmosphere over Russia was about 20 meters in size Blast
effect was measured at 500 KT , the Tunguska explosion of 1908 had a blast effect of 5 MT measures about 40 meters

It blew down a whole forest of 800 sq miles

originally posted by: firerescue
a reply to: Blue Shift

the Tunguska explosion of 1908 had a blast effect of 5 MT measures about 40 meters

It blew down a whole forest of 800 sq miles

It left no crater, so it's quite likely it was a comet nucleus (ices and dust).

a reply to: wildespace

The Tunguska object exploded at about 20,000 ft (6,000 meter) above ground

The Chelyabinsk meteor exploded at least 5 times that distance

Neither left any crater - Chelyabinsk meteor left a few fragments which were recovered

Aa you stated Tunguska was likely chuck off a comet, rock, dust held together by ices