|
2013 Russian Meteor Event
The Chelyabinsk meteor () was a superbolide that entered Earth's atmosphere over the southern Ural region in Russia on 15 February 2013 at about 09:20 YEKT (03:20 UTC). It was caused by an approximately , near-Earth asteroid that entered the atmosphere at a shallow 18‐degree angle with a speed relative to Earth of . The light from the meteor was briefly brighter than the Sun, visible as far as away. It was observed in a wide area of the region and in neighbouring republics. Some eyewitnesses also reported feeling intense heat from the fireball. The object exploded in a meteor air burst over Chelyabinsk Oblast, at a height of about . The explosion generated a bright flash, producing a hot cloud of dust and gas that penetrated to , and many surviving small fragmentary meteorites. Most of the object's energy was absorbed by the atmosphere, creating a large shock wave. The asteroid had a total kinetic energy before atmospheric impact equivalent to the blast yield of , est ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismic Measurements
Seismology (; from Ancient Greek σεισμός (''seismós'') meaning "earthquake" and -λογία (''-logía'') meaning "study of") is the scientific study of earthquakes (or generally, quakes) and the generation and propagation of elastic waves through planetary bodies. It also includes studies of the environmental effects of earthquakes such as tsunamis; other seismic sources such as volcanoes, plate tectonics, glaciers, rivers, oceanic microseisms, and the atmosphere; and artificial processes such as explosions. Paleoseismology is a related field that uses geology to infer information regarding past earthquakes. A recording of Earth's motion as a function of time, created by a seismograph is called a seismogram. A seismologist is a scientist who works in basic or applied seismology. History Scholarly interest in earthquakes can be traced back to antiquity. Early speculations on the natural causes of earthquakes were included in the writings of Thales of Miletus (), An ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tyumen Oblast
Tyumen Oblast () is a federal subjects of Russia, federal subject (an oblast) of Russia. It is located in Western Siberia, and is administratively part of the Ural Federal District. The oblast has administrative jurisdiction over two autonomous okrugs of Russia, autonomous okrugs: the Khanty-Mansi Autonomous Okrug, Khanty-Mansi and Yamalo-Nenets Autonomous Okrug. The oblast, including its autonomous okrugs, is the third-largest federal subject by area, and has a population of 3,395,755 (Russian Census (2010), 2010). (The rank is given without the autonomous okrugs' populations; the population and percentages are given for the territory of the oblast with the autonomous okrugs) Tyumen is the largest types of inhabited localities in Russia, city and the Administrative centre, administrative center of the oblast, and the first Russian settlement east of the Ural Mountains. Tyumen Oblast is the largest producer of oil and natural gas in the country, and has experienced an oil boom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sverdlovsk Oblast
Sverdlovsk Oblast ( rus, Свердловская область, Sverdlovskaya oblastʹ, p=svʲɪrdˈlofskəjə ˈobləsʲtʲ) is a federal subject (an oblast) of Russia located in the Ural Federal District. Its administrative center is the city of Yekaterinburg, formerly known as "Sverdlovsk". Its population is 4,268,998 (according to the 2021 Census). Geography Most of the oblast is spread over the eastern slopes of the Middle and North Urals and the Western Siberian Plain. Only in the southwest does the oblast stretch onto the western slopes of the Ural Mountains. The highest mountains all rise in the North Urals, Konzhakovsky Kamen at and Denezhkin Kamen at . The Middle Urals is mostly hilly country with no discernible peaks; the mean elevation is closer to above sea level. Principal rivers include the Tavda, the Tura, the Chusovaya, and the Ufa, the latter two being tributaries of the Kama. Sverdlovsk Oblast borders with, clockwise from the west, Perm Krai, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kurgan Oblast
Kurgan Oblast () is a federal subject of Russia (an oblast). Its administrative center is the city of Kurgan. According to the 2021 Census, the population was 776,661, down from 910,807 recorded in the 2010 Census. History Formed by Decree of the Presidium of the Supreme Soviet of the USSR of February 6, 1943. The region included 32 districts of the eastern part of the Chelyabinsk region and 4 districts of the Omsk region with a total population of 975,000. Recipient of the Order of Lenin (1959). Geography Kurgan Oblast is located in Southern Russia and is part of the Urals Federal District. It shares borders with Chelyabinsk Oblast to the west, Sverdlovsk Oblast to the north-west, Tyumen Oblast to the north-east, and Kazakhstan ( Kostanay and North Kazakhstan Region) to the south. Lakes Medvezhye and Filatovo are located in the district. Climate The oblast has a severe continental climate with long cold winters and warm summers with regular droughts. The average ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunguska And Chelyabinsk Meteoroid Size
Tunguska may refer to: Places * There are several rivers in Russia called Tunguska, including: ** Upper Tunguska, an old name of the lower course of the Angara, tributary of the Yenisey ** Podkamennaya Tunguska ("Stony Tunguska", also: "Middle Tunguska"), tributary of the Yenisey *** The Tunguska event, a catastrophic explosion over Siberia in 1908 ** Nizhnyaya Tunguska ("Lower Tunguska"), tributary of the Yenisey ** Tunguska (Amur), tributary of the Amur * Tunguska Plateau In arts and entertainment * ''Tunguska'' (album), a 2006 album by Suns of the Tundra * '' Secret Files: Tunguska'', a 2006 video game * "Tunguska", a song by Cymbals Eat Guitars Cymbals Eat Guitars were an indie rock band from Staten Island, New York, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trajectory Of Chelyabinsk Meteoroid En
A trajectory or flight path is the path that an object with mass in motion follows through space as a function of time. In classical mechanics, a trajectory is defined by Hamiltonian mechanics via canonical coordinates; hence, a complete trajectory is defined by position and momentum, simultaneously. The mass might be a projectile or a satellite. For example, it can be an orbit — the path of a planet, asteroid, or comet as it travels around a central mass. In control theory, a trajectory is a time-ordered set of states of a dynamical system (see e.g. Poincaré map). In discrete mathematics, a trajectory is a sequence (f^k(x))_ of values calculated by the iterated application of a mapping f to an element x of its source. Physics of trajectories A familiar example of a trajectory is the path of a projectile, such as a thrown ball or rock. In a significantly simplified model, the object moves only under the influence of a uniform gravitational force field. This can be a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
367943 Duende
367943 Duende (Provisional designation in astronomy, provisional designation ) is a micro-asteroid and a near-Earth object of the Aten asteroid, Aten and Atira asteroid, Atira group, approximately in diameter. It was discovered by astronomers of the Astronomical Observatory of Mallorca at its robotic La Sagra Observatory in 2012, and named for the Duende (mythology), duende, a goblin-like creature from Iberian mythology and folklore. ''Duende'' is likely an uncommon L-type asteroid and significantly elongated. For an asteroid of its size, it has a relatively long rotation period of 9.485 hours. On 15 February 2013, ''Duende'' passed at a List of record-setting asteroid close approaches to Earth, record distance of or 4.3 Earth radius, Earth radii from Earth's surface. Due to its close passage, its orbit was Perturbation (astronomy), perturbed significantly enough that it changed from an Apollo asteroid to an Aten asteroid. ''Duende'' passage also Chelyabinsk meteor#Coincidental ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Near-Earth Object
A near-Earth object (NEO) is any small Solar System body orbiting the Sun whose closest approach to the Sun ( perihelion) is less than 1.3 times the Earth–Sun distance (astronomical unit, AU). This definition applies to the object's orbit around the Sun, rather than its current position, thus an object with such an orbit is considered an NEO even at times when it is far from making a close approach of Earth. If an NEO's orbit crosses the Earth's orbit, and the object is larger than across, it is considered a potentially hazardous object (PHO). Most known PHOs and NEOs are asteroids, but about a third of a percent are comets. There are over 37,000 known near-Earth asteroids (NEAs) and over 120 known short-period near-Earth comets (NECs). A number of solar-orbiting meteoroids were large enough to be tracked in space before striking Earth. It is now widely accepted that collisions in the past have had a significant role in shaping the geological and biological history of Ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siberia
Siberia ( ; , ) is an extensive geographical region comprising all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has formed a part of the sovereign territory of Russia and its predecessor states since the lengthy conquest of Siberia, which began with the fall of the Khanate of Sibir in 1582 and concluded with the annexation of Chukotka in 1778. Siberia is vast and sparsely populated, covering an area of over , but home to roughly a quarter of Russia's population. Novosibirsk, Krasnoyarsk, and Omsk are the largest cities in the area. Because Siberia is a geographic and historic concept and not a political entity, there is no single precise definition of its territorial borders. Traditionally, Siberia spans the entire expanse of land from the Ural Mountains to the Pacific Ocean, with the Ural River usually forming the southernmost portion of its western boundary, and includes most of the drainage basin of the Arctic Ocean. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunguska Event
The Tunguska event was a large explosion of between 3 and 50 TNT equivalent, megatons that occurred near the Podkamennaya Tunguska River in Yeniseysk Governorate (now Krasnoyarsk Krai), Russia, on the morning of 30 June 1908. The explosion over the sparsely populated East Siberian taiga felled an estimated 80 million trees over an area of of forest, and eyewitness accounts suggest up to three people may have died. The explosion is attributed to a meteor air burst, the atmospheric explosion of a stony asteroid about wide. The asteroid approached from the east-south-east, probably with a relatively high speed of about . Though the incident is classified as an impact event, the object is thought to have exploded at an altitude of rather than hitting the Earth's surface, leaving no impact crater. The Tunguska event is the largest impact event on Earth in recorded history, though List of impact craters on Earth, much larger impacts are believed to have occurred in prehistoric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiant (meteor Shower)
The radiant or apparent radiant of a meteor shower is the celestial point in the sky from which (from the point of view of a terrestrial observer) the paths of meteors appear to originate. The Perseids, for example, are meteors which appear to come from a point within the constellation of Perseus. Meteor paths appear at random locations in the sky, but the apparent paths of two or more meteors from the same shower will diverge from the radiant. The radiant is the vanishing point of the meteor paths, which are parallel lines in three-dimensional space, as seen from the perspective of the observer, who views a two-dimensional projection against the sky. The geometric effect is identical to crepuscular rays, where parallel sunbeams appear to diverge. A meteor that does not point back to the known radiant for a given shower is known as a ''sporadic'' and is not considered part of that shower. Shower meteors may appear a short time before the radiant has risen in the observer's ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
