Discover Hiroshima's Hypocenter in Hiroshima, Japan: A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

It was caused by an approximately 20 m (66 ft) near-Earth asteroid with a speed of 19.16 ± 0.15 kilometres per second (60,000 –69,000 km/h or 40,000 –42,900 mph). The Castle Bravo crater was formed on March 1, 1954 after a 15 megaton explosion occured at Bikini Atoll, Marshall Islands. On August 6, 1945, the American bomber Enola Gay dropped a five-ton bomb over the Japanese city of Hiroshima. When the U.S. air forces dropped these two bombs on two Japanese states, it was a first reported incident, when nuclear weapon was used for warfare. According to figures published in 1945, 66,000 people were killed as a direct result of the Hiroshima blast, and 69,000 were injured. Three days later, a … Today you will hardly find a person, who has never heard of the nuclear bomb explosion over Hiroshima and Nagasaki during the World War II. Bravo Crater. The Chelyabinsk meteor was a superbolide that entered Earth's atmosphere over Russia on 15 February 2013 at about 09:20 YEKT (03:20 UTC). It quickly became a brilliant superbolide meteor over the southern Ural region. The crater now has an observation deck and has become a tourist attraction in its own right, attracting over 10,000 visitors every year. Internet Archive BookReader The effects of the atomic bomb on Hiroshima, Japan (the secret U.S. Strategic Bombing Survey report 92, Pacific Theatre) The atomic bombs dropped on Hiroshima and Nagasaki at the end of World War II—codenamed "Little Boy" and "Fat Man," respectively—caused widespread destruction, leveled cities, … Exactly 70 years ago the US dropped the atomic bomb, nicknamed Little Boy, on Hiroshima, killing 140,000 of its 350,000 citizens. Table of Hourly Weather Observations (Today/Yesterday) Airport Weather; Volcanic Warnings : Area Notes.