“At a press conference on Tuesday April 22, 2014 at the Seattle Museum of Flight, three prominent astronauts supporting the B612 Foundation presented a visualization of new data showing the surprising frequency at which the Earth is hit by asteroids. The astronauts were guests  of the Seattle Museum for a special series of public events on Earth Day 2014. Between 2000 and 2013, this network detected 26 explosions on Earth ranging in energy from 1-600 kilotons – all caused not by nuclear explosions, but rather by asteroid impacts. To put that in perspective,
the atomic bomb that destroyed Hiroshima in 1945, exploded with an energy impact of 15 kilotons. While  most of these asteroids exploded too high in the atmosphere to do serious damage on the ground, the  evidence is important in estimating the frequency of a potential “city-killer-size” asteroid.  The B612 Foundation released a new video visualization of these findings, showing the impact size range and location of all 26 explosions. The video is posted here and can also be viewed on YouTube.com. The listing of all locations and size of impacts is also listed with additional FAQs.”