Should a mile-wide asteroid directly hit London it would destroy everything to Brussels and Amsterdam, as well as cause extensive damage perhaps 1,000 miles out — that’s as far away as Sarajevo and Naples.
The quantity of dust and debris thrown into the atmosphere would block out sunlight and cause most living things on Earth to die.
If an asteroid that size landed in the ocean, it would triggered tidal waves hundreds of feet high that would completely erase the coastlines in the vicinity.
In 2028, the asteroid 1997XF11 will come perilously close to Earth but will miss the planet.
If something were to change and it did hit Earth, the mile-wide asteroid would impact Earth at approximately 30,000 mph.