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2022 Taitung Earthquakes
The 2022 Taitung earthquakes were a series of two earthquakes affecting Taitung and Hualien Counties, Taiwan. The first earthquake struck Taitung on September 17, 2022, occurring with a magnitude of 6.5 , causing minor damage and some injuries. The second earthquake occurred roughly a day after the first tremor struck the same area, with a stronger magnitude of 6.9 . The earthquakes reached a maximum intensity of VII (''Very strong'') and IX (''Violent'') respectively on the Modified Mercalli Intensity Scale. Tectonic setting Taiwan lies on the boundary between the Eurasian Plate and the Philippine Plate, which converge at 80 mm per year. The island is the result of uplift caused by the collision between the northern end of the Luzon Arc and the continental margin of China. Earthquakes The earthquakes were the result of shallow oblique-slip faulting. An analysis of both focal mechanisms suggest the earthquakes ruptured along a shallow WNW-dipping, SSW–NNE-striking si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Excavator
Excavators are heavy construction equipment consisting of a boom, dipper (or stick), bucket and cab on a rotating platform known as the "house". The house sits atop an undercarriage with tracks or wheels. They are a natural progression from the steam shovels and often mistakenly called power shovels. All movement and functions of a hydraulic excavator are accomplished through the use of hydraulic fluid, with hydraulic cylinders and hydraulic motors. Due to the linear actuation of hydraulic cylinders, their mode of operation is fundamentally different from cable-operated excavators which use winches and steel ropes to accomplish the movements. Terminology Excavators are also called diggers, JCBs (a proprietary name, in an example of a generic trademark), mechanical shovels, or 360-degree excavators (sometimes abbreviated simply to "360"). Tracked excavators are sometimes called "trackhoes" by analogy to the backhoe. In the UK and Ireland, wheeled excavators are sometim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Arc
A volcanic arc (also known as a magmatic arc) is a belt of volcanoes formed above a subducting oceanic tectonic plate, with the belt arranged in an arc shape as seen from above. Volcanic arcs typically parallel an oceanic trench, with the arc located further from the subducting plate than the trench. The oceanic plate is saturated with water, mostly in the form of hydrous minerals such as micas, amphiboles, and serpentine minerals. As the oceanic plate is subducted, it is subjected to increasing pressure and temperature with increasing depth. The heat and pressure break down the hydrous minerals in the plate, releasing water into the overlying mantle. Volatiles such as water drastically lower the melting point of the mantle, causing some of the mantle to melt and form magma at depth under the overriding plate. The magma ascends to form an arc of volcanoes parallel to the subduction zone. Volcanic arcs are distinct from volcanic chains formed over hotspots in the middle of a te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foreshock
A foreshock is an earthquake that occurs before a larger seismic event (the mainshock) and is related to it in both time and space. The designation of an earthquake as ''foreshock'', ''mainshock'' or aftershock is only possible after the full sequence of events has happened. Occurrence Foreshock activity has been detected for about 40% of all moderate to large earthquakes, and about 70% for events of M>7.0. They occur from a matter of minutes to days or even longer before the main shock; for example, the 2002 Sumatra earthquake is regarded as a foreshock of the 2004 Indian Ocean earthquake with a delay of more than two years between the two events. Some great earthquakes (M>8.0) show no foreshock activity at all, such as the M8.6 1950 India–China earthquake. The increase in foreshock activity is difficult to quantify for individual earthquakes but becomes apparent when combining the results of many different events. From such combined observations, the increase before the mai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Weather Bureau Seismic Intensity Scale
The Central Weather Bureau seismic intensity scale () is a seismic intensity scale used in Taiwan. It was established by the Central Weather Bureau The Central Weather Bureau (CWB; ) is the government meteorological research and forecasting institution of the Republic of China (Taiwan). In addition to meteorology, the Central Weather Bureau also makes astronomical observations, reports on s .... Scale overview References Seismic intensity scales Central Weather Bureau {{Taiwan-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Weather Bureau
The Central Weather Bureau (CWB; ) is the government meteorological research and forecasting institution of the Republic of China (Taiwan). In addition to meteorology, the Central Weather Bureau also makes astronomical observations, reports on sea conditions, and conducts research into seismology and provides earthquake reports. The Central Weather Bureau is headquartered in Taipei City and is administered under the Ministry of Transportation and Communications. History While Taiwan was under Japanese rule, the government set up five weather monitoring stations on the island, located in Taipei, Taichung, Tainan, Hengchun, and Penghu. On 19 December 1897, the Governor-General moved the headquarters to the present location occupied by the eventual successor agency of the Japanese "Taipei Observatory": the Central Weather Bureau. In 1945 when the Kuomintang took control of Taiwan the various stations set up by the Japanese were incorporated into the new Taiwan Provincial Weather In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central News Agency (Taiwan)
The Central News Agency (CNA) is a government-controlled news agency in Taiwan. In addition to its Chinese language edition, it also has English and Japanese editions. It has a 300-strong employee base, and overseas branches in some 30 countries. It works with a number of well-known news agencies around the world, such as the Associated Press, Reuters, Deutsche Welle, and Agence France-Presse. History The agency was founded , by the Kuomintang. Its headquarters was originally located in Guangzhou in Guangdong, but had to be relocated to Taipei in 1949, following the defeat of the Republic of China government in mainland China in the Chinese Civil War. Despite the corporatisation of the agency in 1973, it continued to receive heavy government subsidies, and remained the nation's official agency. At the time, CNA journalists received preferential treatment on various occasions, mostly government-related press conferences. After democratization, on 1 July 1996, the agency becam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continental Collision
In geology, continental collision is a phenomenon of plate tectonics that occurs at convergent boundaries. Continental collision is a variation on the fundamental process of subduction, whereby the subduction zone is destroyed, mountains produced, and two continents sutured together. Continental collision is only known to occur on Earth. Continental collision is not an instantaneous event, but may take several tens of millions of years before the faulting and folding caused by collisions stops. The collision between India and Asia has been going on for about 50 million years already and shows no signs of abating. Collision between East and West Gondwana to form the East African Orogen took about 100 million years from beginning (610 Ma) to end (510 Ma). The collision between Gondwana and Laurasia to form Pangea occurred in a relatively brief interval, about 50 million years long. Subduction zone: the collision site The process begins as two conti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Mountain Range
The Central Mountain Range is the principal mountain range on the island of Taiwan. It runs from the north of the island to the south. Due to this separation, connecting between the west and east is not very convenient. The tallest peak of the range is Xiuguluan Mountain, . Names "Central Range" or "Central Mountain Range" is a calque of the range's Chinese name, the ''Zhōngyāng Shānmài'' or ''Shānmò''. It is also sometimes simply called the Zhongyang or in English. During the Qing Dynasty, the range was known as the , from the Wade-Giles romanization of the Chinese name ''Dàshān'', meaning "Big Mountains". Geography In a broad sense, Central Mountain Range includes its conjoint ranges such as Xueshan Range and Yushan Range; thus the tallest peak of Central Mountain Range in this sense is Yushan (Jade Mountain/Mount Morrison), , and the second tallest peak is Xueshan (Snow Mountain), . Ecology The Central Range lies within the Taiwan subtropical evergreen for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huadong Valley
The Huadong Valley or Hualien–Taitung Valley (), also known as East Rift Valley or the Longitudinal Valley, is a long and narrow valley located between the Central Mountain Range and the Hai'an Range, Coastal Mountain Range. It is also recognized as a plain area which stretches for about 180 kilometers near the eastern coast of Taiwan, passes from Hualien City at the north to Taitung City at the south. It was called or simply Nakasendō during the Taiwan under Japanese rule, era of Japanese rule. The valley is believed to be part of the northern terminus of the Philippine Mobile Belt, a complex collection of tectonic plate fragments and volcanic intrusions. There are three large river systems flowing through this valley, including the Hualien River, Hualien, Xiuguluan River, Xiugulan and Beinan Rivers, all of which flow into the Pacific Ocean. The Huadong Highway, a section of Provincial Highway No. 9 (Taiwan), Provincial Highway No. 9, runs the entire length of the valley f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epicenter
The epicenter, epicentre () or epicentrum in seismology is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates. Surface damage Before the instrumental period of earthquake observation, the epicenter was thought to be the location where the greatest damage occurred, but the subsurface fault rupture may be long and spread surface damage across the entire rupture zone. As an example, in the magnitude 7.9 Denali earthquake of 2002 in Alaska, the epicenter was at the western end of the rupture, but the greatest damage was about away at the eastern end. Focal depths of earthquakes occurring in continental crust mostly range from . Continental earthquakes below are rare whereas in subduction zone earthquakes can originate at depths deeper than . Epicentral distance During an earthquake, seismic waves propagate in all directions from the hypocenter. Seismic shadowing occurs on the opposite s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CTS News And Info
CTS News and Info () is a digital television 24-hour news channel operated by Chinese Television System (CTS) in Taiwan. It used to be CTS Recreation () until September 10, 2012. On April 19, 2021, CTS News and Info Channel took over Taiwan's Cable Channel 52 replaced the rival CTi News, owned by the Want Want China Times Group after the National Communications Commission The National Communications Commission (NCC; ) is an independent statutory agency of Executive Yuan of the Republic of China (Taiwan) responsible for regulating the development of the telecommunication and broadcasting industries, promoting compe ... approved CTS News and Info Channel's transfer from cable channel 130 to cable channel 52. Opening and Closing times CTS Main Channel is on air 24 hours each day. Except for the last Thursday of every month at 4 AM, it will be closed for one hour for system testing, and then the broadcast will resume at 5 AM. References Television stations in Taiwan Televi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismologist
Seismology (; from Ancient Greek σεισμός (''seismós'') meaning "earthquake" and -λογία (''-logía'') meaning "study of") is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies. It also includes studies of earthquake environmental effects such as tsunamis as well as diverse seismic sources such as volcanic, tectonic, glacial, fluvial, oceanic, atmospheric, and artificial processes such as explosions. A related field that uses geology to infer information regarding past earthquakes is paleoseismology. A recording of Earth motion as a function of time is called a seismogram. A seismologist is a scientist who does research in 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 (c. 585 BCE), Anaximenes of Miletus (c. 550 BCE), Aristotle (c. 340 BCE), and Zhan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
