The night of July 2 inhabitants of Tokyo noticed a bright flash that was accompanied by a loud explosion. Presumably, this was a bolide with a diameter of about 1.6 meters, according to the Japan Times.
Every day in the Earth’s atmosphere burns several thousand meteoroids, but the vast majority of such events happens over the oceans and uninhabited regions. In addition, very often flashes occur during the day, making them almost invisible. While our understanding of meteoroid (celestial bodies, which is the size between the space dust and asteroids) are based mainly on studies of photographs of meteors with magnitude > -4 obtained in the last 50 years. At first glance, it may seem that this is a long period of time, but for decades scientists have managed to collect only 800 shots of these cars, so the photos and videos of flashes in the sky today continues to play an important role.
Flash over Tokyo occurred at about 2:30 a.m. local time (or 20:30 on 1 July in Moscow) was observed over the greater part of Japan’s Kanto region. As shown by the entry made by Daiichi Fuji (Fujii Daichi), the curator of the Museum of the City of Hiratsuka in Kanagawa Prefecture, the object was moving from West to East.
The flash was visible only a few seconds, but it managed to register one of the infrasound stations of the International monitoring system, which was nearly 1150 miles. In addition, the outbreak was recorded and the akeno Observatory, owned by the Tokyo Institute of technology. Based on available data, the international meteor organization calculated the energy of the allied bombs that happened on Thursday night — she was 150 tons in a trotyl equivalent. When the estimated speed of 14 kilometers per second and a density of 3000 kilograms per cubic meter, the diameter of which flew over Japan heavenly bodies was equal to about 1.6 meters and weighs around 1.6 tons. For comparison, the Chelyabinsk meteoritethat exploded over in 2013 was probably 10-20 times heavier.
In addition, they tweeted a picture, which, apparently, shows a high-temperature plasma formed by the evaporation of the substance of the meteorite during passage through the atmosphere.
Such flashes are not the rare phenomenon, even though people haven’t heard the accompanying explosion. But they, as well as other sounds (e.g., sounds of falling space dust), can be captured with the help of infrasound stations, which you can read in the podcast “the Last cry of a meteorite”. By the way, in rare cases, cars cannot compare with fallen to Earth by meteorites, for example, Japanese astronomers found outthat a bright fireball that was observed by the inhabitants of Japan at the end of April 2017, was a fragment of the asteroid 2003 YT1.