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1966 Hualien Earthquake
The 1966 Hualien earthquake occurred on March 13 at . The epicenter was located in the offshore area between Yonaguni Island, Japan and Hualien, Taiwan. The intensity in Yonaguni reached shindo 5. Two people were reported dead in Yonaguni, Japan, and four in Taiwan. Building damage was reported. A tsunami with a run-up height of was observed. This earthquake released a seismic moment of 4.86×1020 Nm. The magnitude of this earthquake was put at 8.0, 7.79, 7.8, or 7.8. This earthquake had a strike-slip faulting focal mechanism. The fault plane solutions of this earthquake suggested that there is a sliver of crust off the east coast of Taiwan other than the Philippine Sea Plate. The map of shallow earthquakes shows that the Philippines are encircled by a zone of seismicity. There is a difference between the slip direction in the east coast of the Philippines and the relative motion between the Philippine Sea Plate and the Eurasian Plate. Together with other evidences, it has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yonaguni Island
, one of the Yaeyama Islands, is the westernmost inhabited island of Japan, lying from the east coast of Taiwan, between the East China Sea and the Pacific Ocean proper. The island is administered as the town of Yonaguni, Yaeyama Gun, Okinawa, and there are three settlements: Sonai, Kubura, and Higawa. History Early human migration from Taiwan to Yonaguni island has long been the subject of scholarly debate. In 2019, a team of Japanese and Taiwanese researchers succeeded in completing the two-day journey from Cape Wushibi in Taitung County to Yonaguni island along the Kuroshio current in a dugout canoe based on technology and materials from 30,000 years ago. Otherwise, the early history of Yonaguni remains vague. The first written record that ever mentions the island is a 1477 Korean document (''Chosen Hyōryūmin no Yaeyama kenbunroku''), an account of several fishermen from the current Jeju Province who drifted there. A legendary female leader, San’ai Isoba, is said to ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hualien County
Hualien County (Mandarin Wade–Giles: Hua¹-lien² Hsien⁴; Pīnyīn: ''Huālián Xiàn''; Hokkien POJ: ''Hoa-lian-koān'' or ''Hoa-liân-koān''; Hakka PFS: ''Fâ-lièn-yen''; Amis: ''Kalingko'') is a county on the east coast of Taiwan. It is the largest county by area, yet due to its mountainous terrain, has one of the lowest populations in the country. The county seat and largest city is Hualien City. Most of the population resides in the Huadong Valley, which runs north to south, sandwiched between the Central and Hai'an mountain ranges. Due to the rural nature of the county, Hualien attracts many visitors for its natural environment, which includes Taroko Gorge, Qingshui Cliff and Qixingtan Beach. History Early history Modern-day Hualien City was originally called ''Kilai'' (), after the Sakiraya Taiwanese aborigines and their settlement. Spanish settlers arrived in 1622 to pan for gold. Picking up the sounds of native words, these settlers called the area ''Turumoa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismic Moment
Seismic moment is a quantity used by seismologists to measure the size of an earthquake. The scalar seismic moment M_0 is defined by the equation M_0=\mu AD, where *\mu is the shear modulus of the rocks involved in the earthquake (in pascals (Pa), i.e. newtons per square meter) *A is the area of the rupture along the geologic fault where the earthquake occurred (in square meters), and *D is the average slip (displacement offset between the two sides of the fault) on A (in meters). M_0 thus has dimensions of torque, measured in newton meters. The connection between seismic moment and a torque is natural in the body-force equivalent representation of seismic sources as a double-couple (a pair of force couples with opposite torques): the seismic moment is the torque of each of the two couples. Despite having the same dimensions as energy, seismic moment is not a measure of energy. The relations between seismic moment, potential energy drop and radiated energy are indirect and appro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philippine Sea Plate
The Philippine Sea Plate or the Philippine Plate is a tectonic plate comprising oceanic lithosphere that lies beneath the Philippine Sea, to the east of the Philippines. Most segments of the Philippines, including northern Luzon, are part of the Philippine Mobile Belt, which is geologically and tectonically separate from the Philippine Sea Plate. The plate is bordered mostly by convergent boundaries:Smoczyk, G.M., Hayes, G.P., Hamburger, M.W., Benz, H.M., Villaseñor, Antonio, and Furlong, K.P., 2013Seismicity of the Earth 1900–2012 Philippine Sea Plate and vicinity U.S. Geological Survey Open-File Report 2010–1083-M, scale 1:10,000,000, ''https://dx.doi.org/10.3133/ofr20101083m''. To the north, the Philippine Sea Plate meets the Okhotsk Plate at the Nankai Trough. The Philippine Sea Plate, the Amurian Plate, and the Okhotsk Plate meet near Mount Fuji in Japan. The thickened crust of the Izu–Bonin–Mariana arc colliding with Japan constitutes the Izu Collision Zone. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurasian Plate
The Eurasian Plate is a tectonic plate that includes most of the continent of Eurasia (a landmass consisting of the traditional continents of Europe and Asia), with the notable exceptions of the Indian subcontinent, the Arabian subcontinent and the area east of the Chersky Range in eastern Siberia. It also includes oceanic crust extending westward to the Mid-Atlantic Ridge and northward to the Gakkel Ridge. The eastern edge is a boundary with the North American Plate to the north and a boundary with the Philippine Sea Plate to the south and possibly with the Okhotsk Plate and the Amurian Plate. The southern edge is a boundary with the African Plate to the west, the Arabian Plate in the middle and the Indo-Australian Plate to the east. The western edge is a divergent boundary with the North American Plate forming the northernmost part of the Mid-Atlantic Ridge, which is straddled by Iceland. All volcanic eruptions in Iceland, such as the 1973 eruption of Eldfell, the 1783 eruptio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In 1966
This is a list of earthquakes in 1966. Only magnitude 6.0 or greater earthquakes appear on the list. Lower magnitude events are included if they have caused death, injury or damage. Events which occurred in remote areas will be excluded from the list as they wouldn't have generated significant media interest. All dates are listed according to UTC time. Maximum intensities are indicated on the Mercalli intensity scale and are sourced from United States Geological Survey (USGS) ShakeMap data. With only 9 events above magnitude 7.0+ this was a fairly quiet year. The largest event was in Peru in October and measured 8.1. Turkey had the deadliest event of the year when in August a magnitude 6.8 earthquake caused nearly 2,400 deaths. China had a number of deadly earthquakes especially in March. DR Congo also had an earthquake in March which resulted in 140 deaths. Japan and large portions of Indonesia were notably quiet this year. Overall By death toll * Note: At least 10 casua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In Taiwan
Taiwan is in a seismically active zone, on the Pacific Ring of Fire, and at the western edge of the Philippine Sea Plate.Taiwan Yearbook 2005, p. 23 Geologists have identified 42 active faults on the island, but most of the earthquakes detected in Taiwan are due to the convergence of the Philippine Sea plate and the Eurasian Plate to the east of the island. Most of the earthquakes registered in Taiwan actually occur off the east coast and cause little damage, whereas smaller quakes beneath the island itself have historically proven more destructive. The first recorded earthquake in Taiwan was in 1624, the founding year of Dutch Formosa. Between 1901 and the year 2000 there were 91 major earthquakes in Taiwan, 48 of them resulting in loss of life. The most recent major earthquake was the 921 earthquake, which struck on 21 September 1999, and claimed 2,415 lives. Many modern buildings in Taiwan are constructed with earthquake safety in mind, including Taipei 101, which had to cope w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1966 Earthquakes
Events January * January 1 – In a coup, Colonel Jean-Bédel Bokassa takes over as military ruler of the Central African Republic, ousting President David Dacko. * January 3 – 1966 Upper Voltan coup d'état: President Maurice Yaméogo is deposed by a military coup in the Republic of Upper Volta (modern-day Burkina Faso). * January 10 ** Pakistani–Indian peace negotiations end successfully with the signing of the Tashkent Declaration, a day before the sudden death of Indian prime minister Lal Bahadur Shastri. ** The House of Representatives of the US state of Georgia refuses to allow African-American representative Julian Bond to take his seat, because of his anti-war stance. ** A Commonwealth Prime Ministers' Conference convenes in Lagos, Nigeria, primarily to discuss Rhodesia. * January 12 – United States President Lyndon Johnson states that the United States should stay in South Vietnam until Communist aggression there is ended. * January 15 – 1966 Nigeria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megathrust Earthquakes In Taiwan
Megathrust earthquakes occur at convergent plate boundaries, where one tectonic plate is forced underneath another. The earthquakes are caused by slip along the thrust fault that forms the contact between the two plates. These interplate earthquakes are the planet's most powerful, with moment magnitudes (''Mw'') that can exceed 9.0. Since 1900, all earthquakes of magnitude 9.0 or greater have been megathrust earthquakes. The thrust faults responsible for megathrust earthquakes often lie at the bottom of oceanic trenches; in such cases, the earthquakes can abruptly displace the sea floor over a large area. As a result, megathrust earthquakes often generate tsunamis that are considerably more destructive than the earthquakes themselves. Teletsunamis can cross ocean basins to devastate areas far from the original earthquake. Terminology and mechanism The term ''megathrust'' refers to an extremely large thrust fault, typically formed at the plate interface along a subduction zone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1966 Tsunamis
Events January * January 1 – In a coup, Colonel Jean-Bédel Bokassa takes over as military ruler of the Central African Republic, ousting President David Dacko. * January 3 – 1966 Upper Voltan coup d'état: President Maurice Yaméogo is deposed by a military coup in the Republic of Upper Volta (modern-day Burkina Faso). * January 10 ** Pakistani–Indian peace negotiations end successfully with the signing of the Tashkent Declaration, a day before the sudden death of Indian prime minister Lal Bahadur Shastri. ** Georgia House of Representatives, The House of Representatives of the US state of Georgia refuses to allow African-American representative Julian Bond to take his seat, because of his anti-war stance. ** A Commonwealth Prime Ministers' Conference convenes in Lagos, Nigeria, primarily to discuss Rhodesia. * January 12 – United States President Lyndon Johnson states that the United States should stay in South Vietnam until Communism, Communist aggression there is e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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