The Aral Sea in the north and Karakalpakstan, an autonomous region of Uzbekistan, in the south. The name roughly translates as "Sea of Islands", referring to more than 1,534 islands that once dotted its waters; in Old Turkic "aral" is island and thicket.
A következő címkéjű bejegyzések mutatása: disaster. Összes bejegyzés megjelenítése
A következő címkéjű bejegyzések mutatása: disaster. Összes bejegyzés megjelenítése
Pripyat, Ukraine
Pripyat is a ghost town near the Chernobyl Nuclear Power Plant in the Kiev Oblast (province) of northern Ukraine, near the border with Belarus. The city has a special status within the Kiev Oblast, being the city of oblast-level subordination (see Administrative divisions of Ukraine), although it is located within the limits of Ivankiv Raion. The city also is being supervised by the Ministry of Emergencies of Ukraine as part of the Zone of Alienation jurisdiction.
Pripyat was founded in 1970 to house workers for the Chernobyl Nuclear Power Plant. It was officially proclaimed a city in 1979 but was abandoned in 1986 following the Chernobyl disaster. It was the ninth nuclear city in the Soviet Union at the time and its population was around 50,000 before the accident. The annual rate of natural increase for the city's population was estimated at around 800 persons, plus over 500 newcomers from all corners of the Soviet Union each year, and Pripyat's population had been expected to rise to 78,000. The Yanov railroad station (part of Chernigov-Ovruch railroad link) was less than 1 km away from the city, and the navigable Pripyat River flows nearby.
Access to Pripyat, unlike cities of military importance, was not restricted before the disaster as nuclear power stations were seen by the Soviet Union as safer than other types of power plants. Nuclear power stations were presented as being an achievement of Soviet engineering, where nuclear power was harnessed for peaceful projects. The slogan "peaceful atom" was popular during those times. The original plan had been to build the plant only 25 km (16 mi) from Kiev, but the Ukrainian Academy of Sciences, among other bodies, expressed concern about it being too close to the city. As a result, the power station and Pripyat were built at their current locations, about 100 km (62 mi) from Kiev. After the disaster the city of Pripyat was evacuated in two days.
[youtube http://www.youtube.com/watch?v=40h6DhmzLt8?rel=0]
"For the attention of the residents of Pripyat! The City Council informs you that due to the accident at Chernobyl Power Station in the city of Pripyat the radioactive conditions in the vicinity are deteriorating. The Communist Party, its officials and the armed forces are taking necessary steps to combat this. Nevertheless, with the view to keep people as safe and healthy as possible, the children being top priority, we need to temporarily evacuate the citizens in the nearest towns of Kiev Oblast. For these reasons, starting from April 27, 1986 2 p.m. each apartment block will be able to have a bus at its disposal, supervised by the police and the city officials. It is highly advisable to take your documents, some vital personal belongings and a certain amount of food, just in case, with you. The senior executives of public and industrial facilities of the city has decided on the list of employees needed to stay in Pripyat to maintain these facilities in a good working order. All the houses will be guarded by the police during the evacuation period. Comrades, leaving your residences temporarily please make sure you have turned off the lights, electrical equipment and water off and shut the windows. Please keep calm and orderly in the process of this short-term evacuation."
Tunguska, Russia
The Tunguska event, or Tunguska blast or Tunguska explosion, was an enormously powerful explosion that occurred near the Podkamennaya Tunguska River in what is now Krasnoyarsk Krai, Russia, at about 7:14 a.m. KRAT (0:14 UT) on June 30, 1908.
The explosion is believed to have been caused by the air burst of a large meteoroid or comet fragment at an altitude of 5–10 kilometres (3–6 mi) above the Earth's surface. Different studies have yielded varying estimates of the object's size, with general agreement that it was a few tens of metres across.
The number of scholarly publications on the problem of the Tunguska explosion since 1908 may be estimated at about 1,000 (mainly in Russian). Many scientists have participated in Tunguska studies, the best-known of them being Leonid Kulik, Yevgeny Krinov, Kirill Florensky, Nikolai Vladimirovich Vasiliev and Wilhelm Fast.
Although the meteoroid or comet burst in the air rather than hitting the surface, this event is still referred to as an impact. Estimates of the energy of the blast range from 5 to as high as 30 megatons of TNT (21–130 PJ),with 10–15 megatons of TNT (42–63 PJ) the most likely—roughly equal to the United States' Castle Bravo thermonuclear bomb tested on March 1, 1954, about 1,000 times more powerful than the atomic bomb dropped on Hiroshima, Japan, and about one-third the power of the Tsar Bomba, the largest nuclear weapon ever detonated.
The explosion knocked over an estimated 80 million trees covering 2,150 square kilometres (830 sq mi). It is estimated that the shock wave from the blast would have measured 5.0 on the Richter scale. An explosion of this magnitude is capable of destroying a large metropolitan area. This possibility has helped to spark discussion of asteroid deflection strategies.
The Tunguska event is the largest impact event over land in Earth's recent history. Impacts of similar size over remote ocean areas would most likely have gone unnoticed before the advent of global satellite monitoring in the 1960s and 1970s.