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2013 North Korean Nuclear Test
On 12 February 2013, North Korean state media announced it had conducted an underground nuclear test, its third in seven years. A tremor that exhibited a nuclear bomb signature with an initial magnitude 4.9 (later revised to 5.1) was detected by the China Earthquake Networks Center, Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization and the United States Geological Survey. In response, Japan summoned an emergency United Nations meeting for 12 February and South Korea raised its military alert status. It is not known whether the explosion was nuclear or a conventional explosion designed to mimic a nuclear blast; as of two days after the blast, Chinese, Japanese, and South Korean investigators had failed to detect any radiation. Test On 12 February 2013, a spokesman for North Korea's army command said it had successfully conducted a third underground nuclear weapons test, according to the Yonhap. North Korea also said the test had used a miniatur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Korea
North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korea, Korean Peninsula and shares borders with China and Russia to the north, at the Yalu River, Yalu (Amnok) and Tumen River, Tumen rivers, and South Korea to the south at the Korean Demilitarized Zone. North Korea's border with South Korea is a disputed border as both countries claim the entirety of the Korean Peninsula. The country's western border is formed by the Yellow Sea, while its eastern border is defined by the Sea of Japan. North Korea, like South Korea, its southern counterpart, claims to be the legitimate government of the entire peninsula and List of islands of North Korea, adjacent islands. Pyongyang is the capital and largest city. In 1910, Korean Empire, Korea was Korea under Japanese rule, annexed by the Empire of Japan. In 1945, after the Surrender of Japan, Japanese surrender at the End of World War II in Asia, end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mantapsan
Mantapsan (or Mount Mant'ap, Chosŏn'gŭl: ) is a mountain in the south of North Hamgyong Province in North Korea. The granite peak, which reaches an elevation of , is part of the Hamgyong Mountains. It is located on the border between Kilju County, Myŏnggan County and Orang County. Political prisoners were reportedly forced to dig tunnels into the southern side of the mountain, at the nuclear test site near P'unggye-ri. The horizontal tunnels are believed to be two to three meters wide and high and hundreds of meters long. This is where the detonations of the North Korean nuclear tests in 2006, 2009, 2013 and 2016 occurred. International analysts believe that the sixth and largest explosion, to this date the last, "made the mountain bulge sideways by about 12 feet and collapse vertically by about a foot and a half", with one seismologist describing the subsequent reaction as the mountain "pancaking". Hwasong concentration camp, at the largest North Korean concentration ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jilin
Jilin (; alternately romanized as Kirin or Chilin) is one of the three provinces of Northeast China. Its capital and largest city is Changchun. Jilin borders North Korea (Rasŏn, North Hamgyong, Ryanggang and Chagang) and Russia (Primorsky Krai) to the east, Heilongjiang to the north, Liaoning to the south, and Inner Mongolia to the west. Along with the rest of Northeast China, Jilin underwent an early period of industrialization. However, Jilin's economy, characterized by heavy industry, has been facing economic difficulties with privatization. This prompted the central government to undertake a campaign called "Revitalize the Northeast". The region contains large deposits of oil shale. Name The name "Jilin" originates from ''girin ula'' () , a Manchu phrase meaning "along the river", shortened to Kirin in English. This Manchu term was transcribed into ''jilin wula'' ( t , s ) in Chinese characters and shortened the first two characters, which are tran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yanbian Korean Autonomous Prefecture
Yanbian (; Chosŏn'gŭl: , ''Yeonbyeon''), officially known as the Yanbian Korean Autonomous Prefecture, is an autonomous prefecture in the east of Jilin Province, China. Yanbian is bordered to the north by Heilongjiang Province, on the west by Jilin's Baishan City and Jilin City, on the south by North Korea's North Hamgyong Province and on the east by Primorsky Krai in Russia. Yanbian is designated as a Korean autonomous prefecture due to the large number of ethnic Koreans living in the region. The prefectural capital is Yanji and the total area is . The prefecture has an important Balhae archaeological site: the Ancient Tombs at Longtou Mountain, which includes the Mausoleum of Princess Jeonghyo. History In the Ming dynasty, Yanbian was governed by the Jianzhou Guard () and in the late Qing dynasty the area was divided into the Yanji () and Hunchun () subprefectures. From 1644 to the 1800s the Manchurian administrators of the Qing state attempted to separate Northeast Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antu County
Antu County (; Chosŏn'gŭl: 안도현; Hangul: 안투현) is a county of southeastern Jilin province, Northeast China. It is under the administration of the Yanbian Korean Autonomous Prefecture. Antu is home to Korean and Manchu minorities. In 2020 it had a population of 195,000, of which 17.9% Koreans. It has a border crossing with North Korea at Shuangmufeng (双目峰). Administrative divisions Antu has seven towns and two townships. Towns: * Mingyue (明月镇 / 명월진), Songjiang (松江镇 / 송강진), Erdaobaihe (二道白河镇 / 이도백하진), liangjiang (两江镇 / 량강진), Shimen (石门镇 / 석문진), Wanbao (万宝镇 / 만보진), Liangbing (亮兵镇 / 량병진) Townships: * Xinhe Township (新合乡 / 신합향), Yongqing Township Yongqing () is a county in Hebei province, China. It is under the administration of the prefecture-level city of Langfang. It borders Guangyang District to the north, Anci District to the east, Bazhou to the south, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hunchun
Hunchun (; Chosŏn'gŭl: 혼춘; Hangul: 훈춘) is a county-level city in the Yanbian Korean Autonomous Prefecture, far eastern Jilin province. It borders North Korea (North Hamgyong province) and Russia (Primorsky Krai), has over 250,000 inhabitants, and covers 5,145 square kilometers. The site of the eastern capital of Balhae/Bohai Kingdom between 785 and 793, Donggyeong, was located here. The city's name Hunchun comes from ''Huncun'' in Manchu language. (). The city and the village Fangchuan is located near the point of junction of the borders of China, Russia, and North Korea; provided with an observation platform, it is a popular tourist attraction. Administrative divisions Hunchun has four subdistricts, four towns, and five townships. Subdistricts: * Xin'an Subdistrict ( / ), Jinghe Subdistrict ( / ), Henan Subdistrict ( / ), Jinhai Subdistrict ( / ) Towns: * Chunhua ( / ), Jingxin ( / ), Banshi ( / ), Ying'an ( / ) Townships: * Hadamen Township ( / ), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
:Surface Wave Magnitude
The surface wave magnitude (M_s) scale is one of the magnitude scales used in seismology to describe the size of an earthquake. It is based on measurements of Rayleigh surface waves that travel along the uppermost layers of the Earth. This magnitude scale is related to the local magnitude scale proposed by Charles Francis Richter in 1935, with modifications from both Richter and Beno Gutenberg throughout the 1940s and 1950s. It is currently used in People's Republic of China as a national standard (GB 17740-1999) for categorising earthquakes. Recorded magnitudes of earthquakes through the mid 20th century, commonly attributed to Richter, could be either M_s or M_L. Definition The formula to calculate surface wave magnitude is: :M_s = \log_\left(\frac\right)_ + \sigma(\Delta)\,, where A is the maximum particle displacement in surface waves (vector sum of the two horizontal displacements) in μm, T is the corresponding period in s (usually 20 2 seconds), Δ is the epic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abbreviation
An abbreviation (from Latin ''brevis'', meaning ''short'') is a shortened form of a word or phrase, by any method. It may consist of a group of letters or words taken from the full version of the word or phrase; for example, the word ''abbreviation'' can itself be represented by the abbreviation ''abbr.'', ''abbrv.'', or ''abbrev.''; ''NPO'', for nil (or nothing) per (by) os (mouth) is an abbreviated medical instruction. It may also consist of initials only, a mixture of initials and words, or words or letters representing words in another language (for example, e.g., i.e. or RSVP). Some types of abbreviations are acronyms (some pronounceable, some initialisms) or grammatical contractions or crasis. An abbreviation is a shortening by any of these or other methods. Different types of abbreviation Acronyms, initialisms, contractions and crasis share some semantic and phonetic functions, and all four are connected by the term "abbreviation" in loose parlance. A initialism is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Far East
The Russian Far East (russian: Дальний Восток России, r=Dal'niy Vostok Rossii, p=ˈdalʲnʲɪj vɐˈstok rɐˈsʲiɪ) is a region in Northeast Asia. It is the easternmost part of Russia and the Asian continent; and is administered as part of the Far Eastern Federal District, which is located between Lake Baikal in eastern Siberia and the Pacific Ocean. The area's largest city is Khabarovsk, followed by Vladivostok. The region shares land borders with the countries of Mongolia, China, and North Korea to its south, as well as maritime boundaries with Japan to its southeast, and with the United States along the Bering Strait to its northeast. The Russian Far East is often considered as a part of Siberia (previously during the Soviet era when it was called the Soviet Far East). Terminology In Russia, the region is usually referred to as just "Far East" (). What is known in English as the Far East is usually referred to as "the Asia-Pacific Region" (, abbrevia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Academy Of Sciences
The Russian Academy of Sciences (RAS; russian: Росси́йская акаде́мия нау́к (РАН) ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across the Russian Federation; and additional scientific and social units such as libraries, publishing units, and hospitals. Peter the Great established the Academy (then the St. Petersburg Academy of Sciences) in 1724 with guidance from Gottfried Leibniz. From its establishment, the Academy benefitted from a slate of foreign scholars as professors; the Academy then gained its first clear set of goals from the 1747 Charter. The Academy functioned as a university and research center throughout the mid-18th century until the university was dissolved, leaving research as the main pillar of the institution. The rest of the 18th century continuing on through the 19th century consisted of many published academic works from Academy scholars and a few Ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geophysical Service Of The Russian Academy Of Sciences
Geophysical Service of the Russian Academy of Sciences (russian: Геофизическая служба Российской Академии Наук) is a research body responsible for geological research. History Geophysical Service was established on the basis of Experimental Methodical Expedition of the Joint Institute of Physics of the Earth in accordance with the Decree of the Presidium of the Russian Academy of Sciences No.107 on May 31, 1994, pursuant to Order of the Government of Russia No.444 of May 11, 1993. Functions The main activities of service: basic research and applied research in the field of seismology and geophysics, as well as conducting continuous seismic monitoring of the Russian Federation, tsunami warning in the Russian Far East, monitoring volcanic activity in Kamchatka and slow monitoring of geodynamic processes in the crust and ground deformation, carrying out continuous seismic monitoring of the world. In addition, in comply with the Order of the G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kilometer
The kilometre ( SI symbol: km; or ), spelt kilometer in American English, is a unit of length in the International System of Units (SI), equal to one thousand metres (kilo- being the SI prefix for ). It is now the measurement unit used for expressing distances between geographical places on land in most of the world; notable exceptions are the United States and the United Kingdom where the statute mile is the unit used. The abbreviations k or K (pronounced ) are commonly used to represent kilometre, but are not recommended by the BIPM. A slang term for the kilometre in the US, UK, and Canadian militaries is ''klick''. Pronunciation There are two common pronunciations for the word. # # The first pronunciation follows a pattern in English whereby metric units are pronounced with the stress on the first syllable (as in kilogram, kilojoule and kilohertz) and the pronunciation of the actual base unit does not change irrespective of the prefix (as in centimetre, millimetre, na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
