Risk of Asteroid Impact

Smaller asteroid impacts occur about twice a year. Only about 3 m (10 feet) in diameter, these stones to move from an average of 17 kilometers per second, has an energy to cause NOK airburst two times the Hiroshima bomb, at a height of 43 km. Initially, it was feared that the impact of nuclear explosions in the atmosphere would be wrong to ask for satellites of asteroids and trigger a nuclear war, but modern satellites are able to distinguish two aspects of flash bombs. Royal Astronomical Society believes that no less than 50 meters above was a meteorite. Meteorites are known as shooting stars. "The impact of a large asteroid, more than 50 meters (164 feet), occur about every 500 years. Similar to the smaller asteroids, asteroids around this size usually lack the kinetic energy to the surface and explode at a height airburst about 7 km. airburst energy is about 6 million tons of TNT, equivalent to a small hydrogen bomb. An asteroid believed to be around this size exploded in a region near the Tunguska River in 1908, creating a circle of trees burned 50 km (30 miles) in diameter. This is called the Tunguska event, and helped to encourage governments worldwide to take the risk of an asteroid impact more severe.

The fireball from an asteroid impact about 250 m (820) in diameter, occurs only once every 2000 years. These asteroids in fact, tend to affect the area, even if they could break a little "before you. The result is energy around a gig, about 20 times more powerful nuclear weapon ever tested, the Tsar Bomba. This impact an asteroid believed to have happened on the moon by the year 1178, where he played a Monaco in Canterbury, England. The impact left a crater a mile diameter class.

Asteroids larger than 1 km (0.62 miles) in diameter, is very rare, occurring less frequently than once every 50,000 years. But these are the most destructive and more likely to threaten the human race, despite its rarity. Such an asteroid impact caused the 50 billion tons of TNT valuable source of energy, are all for more than a few hundred miles in all directions. For example, if an asteroid hit a residential area, you can kill millions of people. But the probability of success in the next 100 years is less than 1 / 500, and the probability of hitting a populated area coincidence is less than 1 / 1, 000