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Earthquake Light
An earthquake light is a luminous aerial phenomenon that reportedly appears in the sky at or near areas of tectonic stress, seismic activity, or volcanic eruptions. There is no broad consensus as to the causes of the phenomenon (or phenomena) involved. The phenomenon differs from disruptions to electrical grids – such as arcing power lines – which can produce bright flashes as a result of ground shaking or hazardous weather conditions. Appearance One of the first records of earthquake lights is during 869 Sanriku earthquake, described as "strange lights in the sky" in Nihon Sandai Jitsuroku. The lights are reported to appear while an earthquake is occurring, although there are reports of lights before or after earthquakes, such as reports concerning the 1975 Kalapana earthquake. They are reported to have shapes similar to those of the auroras, with a white to bluish hue, but occasionally they have been reported having a wider color spectrum. The luminosity is reported to b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luminosity
Luminosity is an absolute measure of radiated electromagnetic power (light), the radiant power emitted by a light-emitting object over time. In astronomy, luminosity is the total amount of electromagnetic energy emitted per unit of time by a star, galaxy, or other astronomical object. In SI units, luminosity is measured in joules per second, or watts. In astronomy, values for luminosity are often given in the terms of the luminosity of the Sun, ''L''⊙. Luminosity can also be given in terms of the astronomical magnitude system: the absolute bolometric magnitude (''M''bol) of an object is a logarithmic measure of its total energy emission rate, while absolute magnitude is a logarithmic measure of the luminosity within some specific wavelength range or filter band. In contrast, the term ''brightness'' in astronomy is generally used to refer to an object's apparent brightness: that is, how bright an object appears to an observer. Apparent brightness depends on both the lumin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2010 Chile Earthquake
The 2010 Chile earthquake and tsunami ( es, Terremoto del 27F) occurred off the coast of central Chile on Saturday, 27 February at 03:34 local time (06:34 UTC), having a magnitude of 8.8 on the moment magnitude scale, with intense shaking lasting for about three minutes. It was felt strongly in six Chilean regions (from Valparaíso in the north to Araucanía in the south) that together make up about 80 percent of the country's population. According to the United States Geological Survey (USGS) the cities experiencing the strongest shaking—VIII (''Severe'') on the Mercalli intensity scale (MM)—were Concepción, Arauco, and Coronel. According to Chile's Seismological Service, Concepción experienced the strongest shaking at MM IX (''Violent''). The earthquake was felt in the capital Santiago at MM VII (''Very strong'') or MM VIII. Tremors were felt in many Argentine cities, including Buenos Aires, Córdoba, Mendoza, and La Rioja. Tremors were felt as far north as the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2022 Qinghai Earthquake
On January 8, 2022, a magnitude 6.6 earthquake struck Menyuan County, Qinghai Province near the border with Gansu Province, China. It was the largest earthquake in China since the 2021 Maduo earthquake. Earthquake The earthquake occurred as a result of shallow (10 km depth) strike-slip faulting at the northeastern Tibetan Plateau. It ruptured a fault located near the Qilian Mountains. The geological structure responsible was the Lenglongling Fault, a segment of the Haiyuan Fault System. The rupture was mostly confined to 0–8 km within the upper crust. A maximum slip of 3.5 m was estimated at 4 km depth. Surface ruptures were observed for a length of 22 km, and the maximum surface displacement was 2.1 m. The evaluated maximum Modified Mercalli intensity was IX (''Violent'') near the rupture zone. Intensity VI (''Strong'') was felt over an area of at least 23,417 km2. By January 17, 2022, at least 584 aftershocks were recorded, and the largest measured 5.3. The aftershocks wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexico
Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatemala, Belize, and the Caribbean Sea; and to the east by the Gulf of Mexico. Mexico covers ,Mexico ''''. . making it the world's 13th-largest country by are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acapulco
Acapulco de Juárez (), commonly called Acapulco ( , also , nah, Acapolco), is a city and major seaport in the state of Guerrero on the Pacific Coast of Mexico, south of Mexico City. Acapulco is located on a deep, semicircular bay and has been a port since the early colonial period of Mexico's history. It is a port of call for shipping and cruise lines running between Panama and San Francisco, California, United States. The city of Acapulco is the largest in the state, far larger than the state capital Chilpancingo. Acapulco is also Mexico's largest beach and balneario resort city. Acapulco de Juárez is the municipal seat of the municipality of Acapulco. The city is one of Mexico's oldest beach resorts, coming into prominence in the 1940s through the 1960s as a getaway for Hollywood stars and millionaires. Acapulco was once a popular tourist resort, but due to a massive upsurge in gang violence and homicide numbers since 2014, Acapulco no longer attracts many foreign touris ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2021 Guerrero Earthquake
A moment magnitude 7.0 or 7.1 earthquake occurred near the city of Acapulco in the Guerrero state of Mexico at on 7 September with an estimated intensity of VIII (''Severe'') on the MMI scale. The earthquake killed 13 people and injured at least 23 others. At least 1.6 million people in Mexico were affected by the earthquake which resulted in localized severe damage. The earthquake occurred on the anniversary of the 2017 Chiapas earthquake which measured 8.2. It was also the largest earthquake in Mexico since the 2020 Oaxaca earthquake. Tectonic setting Mexico is one of the most seismically active regions in the world; located at the boundary of at least three tectonic plates. The west coast of Mexico lies at a convergent plate boundary between the Cocos Plate and North American Plate. The Cocos Plate consists of denser oceanic lithosphere, subducts beneath the less dense continental crust of the North American Plate. Most of the Mexican landmass is situated on the North Ame ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Geographic
''National Geographic'' (formerly the ''National Geographic Magazine'', sometimes branded as NAT GEO) is a popular American monthly magazine published by National Geographic Partners. Known for its photojournalism, it is one of the most widely read magazines of all time. The magazine was founded in 1888 as a scholarly journal, nine months after the establishment of the society, but is now a popular magazine. In 1905, it began including pictures, a style for which it became well-known. Its first color photos appeared in the 1910s. During the Cold War, the magazine committed itself to present a balanced view of the physical and human geography of countries beyond the Iron Curtain. Later, the magazine became outspoken on environmental issues. Since 2019, controlling interest has been held by The Walt Disney Company. Topics of features generally concern geography, history, nature, science, and world culture. The magazine is well known for its distinctive appearance: a thick squa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richter Scale
The Richter scale —also called the Richter magnitude scale, Richter's magnitude scale, and the Gutenberg–Richter scale—is a measure of the strength of earthquakes, developed by Charles Francis Richter and presented in his landmark 1935 paper, where he called it the "magnitude scale". This was later revised and renamed the local magnitude scale, denoted as ML or . Because of various shortcomings of the original scale, most seismological authorities now use other similar scales such as the moment magnitude scale () to report earthquake magnitudes, but much of the news media still erroneously refers to these as "Richter" magnitudes. All magnitude scales retain the logarithmic character of the original and are scaled to have roughly comparable numeric values (typically in the middle of the scale). Due to the variance in earthquakes, it is essential to understand the Richter scale uses logarithms simply to make the measurements manageable (i.e., a magnitude 3 quake factors ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2017 Chiapas Earthquake
The 2017 Chiapas earthquake struck at 23:49 CDT on 7 September (local time; 04:49 on the 8th UTC) in the Gulf of Tehuantepec off the southern coast of Mexico near the state of Chiapas, approximately southwest of Pijijiapan (alternately, south-southwest of Tres Picos), with a Mercalli intensity of IX (''Violent''). The moment magnitude was estimated to be . The earthquake caused all of Mexico City to tremble, prompting people to evacuate after the early warning system was triggered. It also generated a tsunami with waves above tide level; and tsunami alerts were issued for surrounding areas. Mexico's president called it the strongest earthquake recorded in the country in a century. It was also the second strongest recorded in the country's history, behind the magnitude 8.6 earthquake in 1787, and the largest recorded globally in 2017. Tectonic setting The Gulf of Tehuantepec lies above the convergent boundary where the Cocos Plate is being subducted below the North Ameri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1 News
''1 News'' (stylised as ''1News'') is the news division of New Zealand television network TVNZ. The service is broadcast live from TVNZ Centre in Auckland. The flagship news bulletin is the nightly 6 pm news hour, but ''1 News'' also has midday and late night news bulletins, as well as current affairs shows such as ''Breakfast'' and ''Seven Sharp''. The 6 pm programme is New Zealand's most-watched news programme. As of July 2008, it has a market share of 44% (651,400+ each night). TVNZ's Executive Editor, News and Current Affairs (formerly known as Head of News and Current Affairs) is Phil O'Sullivan. O'Sullivan had previously been in the role in an acting capacity since June 2022. His predecessors include John Gillespie who departed TVNZ in 2020, and Paul Yurisich who was appointed to the role of Head of News and Current Affairs until he resigned from TVNZ in 2022 after a review into the hiring of former Al Jazeera presenter Kamahl Santamaria. ''1 News'' was awa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2016 Kaikōura Earthquake
The 2016 Kaikoura earthquake was a magnitude 7.8 (Mw) earthquake in the South Island of New Zealand that occurred two minutes after midnight on 14 November 2016 NZDT (11:02 on 13 November UTC). Ruptures occurred on multiple faults and the earthquake has been described as the "most complex earthquake ever studied". The earthquake started at about north-east of Culverden and south-west of the tourist town of Kaikōura and at a depth of approximately 15 kilometres (9 mi). The complex sequence of ruptures lasted for about two minutes. The cumulative magnitude of the ruptures was 7.8, with the largest amount of that energy released far to the north of the epicentre. Over $1.8 billion in insurance claims were received. There were two deaths, in Kaikōura and Mount Lyford. Earthquake A complex sequence of ruptures with a combined magnitude of 7.8 started at 00:02:56 NZDT on 14 November 2016 and lasted approximately two minutes. The hypocentre (the point where the ruptur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wellington
Wellington ( mi, Te Whanganui-a-Tara or ) is the capital city of New Zealand. It is located at the south-western tip of the North Island, between Cook Strait and the Remutaka Range. Wellington is the second-largest city in New Zealand by metro area, and is the administrative centre of the Wellington Region. It is the world's southernmost capital of a sovereign state. Wellington features a temperate maritime climate, and is the world's windiest city by average wind speed. Legends recount that Kupe discovered and explored the region in about the 10th century, with initial settlement by Māori iwi such as Rangitāne and Muaūpoko. The disruptions of the Musket Wars led to them being overwhelmed by northern iwi such as Te Āti Awa by the early 19th century. Wellington's current form was originally designed by Captain William Mein Smith, the first Surveyor General for Edward Wakefield's New Zealand Company, in 1840. The Wellington urban area, which only includes urbanised ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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