World Asteroid Day is an annual global event which is held on June 30, the anniversary of the Tunguska event in 1908 when a meteor air burst decimated about 2,000 square km (500,000 acres) of pine forest in central Siberia, Russia.

• The Tunguska asteroid event was the Earth's largest asteroid impact in recorded history.
• World Asteroid Day aims to raise public awareness about the asteroid impact hazard and to inform the public about the crisis communication actions to be taken at the global level in case of a credible near-Earth object (NOEs) catastrophic threat to our planet.
• The NEO is an asteroid or comet, which passes close to the Earth's orbit. According to NASA’s Center for NEO Studies, there are over 16 000 Near Earth Asteroids discovered.