title: Asteroid Impact
Size and hazard

Asteroids are constantly smashing into each other. This produces rock fragments covering a range of sizes which will have different effects if they hit the earth.



Click on the asteroids to see the effects of an impact, or click here for a text only description


photo with rollovers: asteroids fifty five hundred one km fifty plus two km extinct


Quite obviously, the bigger the asteroid the greater the damage. This is not all of the story though. The risk from an asteroid depends also on the probability of being hit by one. The next page shows how the bigger asteroids are not necessarily the biggest risk.