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The Qingyang event was a presumed meteor shower or air burst that took place near Qingyang in March or April 1490. [1] [2] The area was at the time part of Shaanxi, but is now in Gansu province. [2] A 1994 study in the journal Meteoritics tentatively explained this event as a meteor air burst. [1]
The most powerful meteor air burst in the modern era was the 1908 Tunguska event. During this event a stony meteoroid about 50–60 m (160–200 ft) in size [ 1 ] [ 2 ] : p. 178 exploded at an altitude of 5–10 km (16,000–33,000 ft) over a sparsely populated forest in Siberia .
March or April – 1490 Qingyang event, a presumed meteor shower or air burst over Qingyang in Ming dynasty China, said to have caused casualties. July 4 – Battle of Bonefield: John Corvinus is defeated by the Kingdom of Hungary. July 13 – John of Kastav finishes a cycle of frescoes in the Holy Trinity Church, Hrastovlje (modern-day ...
The object disintegrated as a meteor air burst over the sea, and no meteorite fragments were recovered. The event occurred during the 2001–2002 India–Pakistan standoff , and there were concerns by General Simon Worden of the U.S. Air Force that if the upper atmosphere explosion had occurred closer to Pakistan or India , it could have ...
March or April – 1490 Qingyang event, a presumed meteor shower or air burst over Qingyang in Ming dynasty China, said to have caused casualties. July 4 – Battle of Bonefield: John Corvinus is defeated by the Kingdom of Hungary. July 13 – John of Kastav finishes a cycle of frescoes in the Holy Trinity Church, Hrastovlje (modern-day ...
Qingyang may refer to: Qingyang, Chengdu (成都市青羊区), a central urban district of Chengdu, Sichuan, China; Qingyang, Anhui (安徽省青阳县), a county in ...
A blast wave reflecting from a surface and forming a mach stem. The air burst is usually 100 to 1,000 m (330 to 3,280 ft) above the hypocenter to allow the shockwave of the fission or fusion driven explosion to bounce off the ground and back into itself, combining two wave fronts and creating a shockwave that is more forceful than the one resulting from a detonation at ground level.
A digital fire control system and auto-loader is situated in the rear of the vehicle. Other standard equipment for Type 09 includes air-conditioning for crew and computers, heating and ventilation, and an NBC system that provides protection against the effects of nuclear, biological and chemical weapons.