Re: Welcome to the 19th century
Kinetic energy = mass times velocity squared. Mass is proportional to diameter cubed. So there's a factor of about eight from the relative sizes. Double the velocity could easily account for another factor of four. Finally, there's the extent to which it dissipates its energy in the atmosphere before impacting the ground. It'll be far worse if it's coming straight down compared to a very oblique impact with the atmosphere. A large one will shed relatively little energy in the atmosphere. Small enough, and it's just a shooting star. That Chelyabinsk meteorite shed all but a small amount of energy in the lower atmosphere, which broke a lot of windows over a wide area rather than subjecting a smaller area to the equivalent of a small ground-burst nuke.