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1929 Grand Banks Earthquake
The 1929 Grand Banks earthquake (also called the Laurentian Slope earthquake and the South Shore Disaster) occurred on November 18, 1929. The shock had a moment magnitude of 7.2 and a maximum Rossi–Forel intensity of VI (''Strong tremor'') and was centered in the Atlantic Ocean off the south coast of Newfoundland in the Laurentian Slope Seismic Zone. Earthquake The earthquake was centred on the edge of the Grand Banks of Newfoundland, about south of the island. It was felt as far away as New York City and Montreal. The quake, along two faults south of the Burin Peninsula, triggered a large submarine landslide displacing (). It snapped 12 submarine transatlantic telegraph cables and led to a tsunami that arrived in three waves. Newfoundland, Canada and Saint Pierre and Miquelon had the largest impact, both from the snapped 12 submarine cables, and the tsunami. This was Canada's largest submarine landslide ever recorded, up to 500 times the size of 1894 Saint-Alban subaerial s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moment Magnitude Scale
The moment magnitude scale (MMS; denoted explicitly with or Mw, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. It was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude/Richter scale () defined by Charles Francis Richter in 1935, it uses a logarithmic scale; small earthquakes have approximately the same magnitudes on both scales. Despite the difference, news media often says "Richter scale" when referring to the moment magnitude scale. Moment magnitude () is considered the authoritative magnitude scale for ranking earthquakes by size. It is more directly related to the energy of an earthquake than other scales, and does not saturate—that is, it does not underestimate magnitudes as other scales do in certain conditions. It has become the standard scale used by seismological authorities like the U.S. Geological SurveyThe "USGS Ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amplitude
The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period). The amplitude of a non-periodic signal is its magnitude compared with a reference value. There are various definitions of amplitude (see below), which are all functions of the magnitude of the differences between the variable's extreme values. In older texts, the phase of a periodic function is sometimes called the amplitude. Definitions Peak amplitude & semi-amplitude For symmetric periodic waves, like sine waves, square waves or triangle waves ''peak amplitude'' and ''semi amplitude'' are the same. Peak amplitude In audio system measurements, telecommunications and others where the measurand is a signal that swings above and below a reference value but is not sinusoidal, peak amplitude is often used. If the reference is zero, this is the maximum absolute value of the signal; if the reference is a mean value (DC component), the peak amplitude is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In Canada
This is a list of earthquakes in Canada. List Abbreviations used: See also *Hydraulic fracturing in Canada References External links *Natural Resources CanadEarthquakes Canada*Earthquakes CanadRecent earthquakes {{DEFAULTSORT:Earthquakes In Canada Earthquakes Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by to ... Lists of disasters in Canada ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In 1929
This is a list of earthquakes in 1929. 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. Several large events occurred this year with the main focus of the activity being in Alaska with 4 magnitude 7.0 + events. The deadliest earthquake struck Turkmenistan in May with 3,800 of the years 3,972 deaths in this event. A rare earthquake struck the north Atlantic Ocean in November with the deaths of 28 in Canada being caused by a tsunami. Indonesia was notably quiet this year. Overall By death toll * Note: At least 10 casualties By magnitude * Note: At least 7.0 magnitude Notable events January February March April May June July August September October November De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbidity Current
A turbidity current is most typically an underwater current of usually rapidly moving, sediment-laden water moving down a slope; although current research (2018) indicates that water-saturated sediment may be the primary actor in the process. Turbidity currents can also occur in other fluids besides water. Researchers from the Monterey Bay Aquarium Research Institute found that a layer of water-saturated sediment moved rapidly over the seafloor and mobilized the upper few meters of the preexisting seafloor. Plumes of sediment-laden water were observed during turbidity current events but they believe that these were secondary to the pulse of the seafloor sediment moving during the events. The belief of the researchers is that the water flow is the tail-end of the process that starts at the seafloor. In the most typical case of oceanic turbidity currents, sediment laden waters situated over sloping ground will flow down-hill because they have a higher density than the adjacent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
L'Île-aux-Marins
L'Île-aux-Marins (literally "The Island of the Sailors"; before 1931 called ''Île-aux-Chiens'', literally "Island of the Dogs") is a small uninhabited island located off the coast of Saint-Pierre and Miquelon. History L'Île-aux-Marins was settled in 1604 and once had a population approaching 700. It was a commune until 1945, when it was annexed by the commune of Saint-Pierre. Since the 1960s, the town has become a ghost town after the last of the population left for Saint Pierre Island; however, a small number of people live there on a seasonal basis between May to November. Several of the town's buildings are still standing, among them are the church (Eglise Notre-Dame-des-Marins), the Jézéquel house, a number of fisherman's homes, and the Archipélitude Museum located in the town's former school. Several of the buildings were designated with protected status by the French Ministry of Culture in 2011, with the addition of the Jézéquel house in 2014. The bow section o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overseas Territory (France)
The term overseas territory (french: territoire d'outre-mer or TOM) is an administrative division of France and is currently only applied to the French Southern and Antarctic Lands. The division differs from that of overseas department and region (french: Départements et régions d'outre-mer or DROM), but because of some common peculiarities, DOMs, TOMs and other overseas possessions under other statuses are often referred to collectively as '. Unlike the British Overseas Territories, which are not constitutionally part of the United Kingdom or its national territory, they are integral parts of the French Republic. Former overseas territories * New Caledonia, from 1946 to 1999, now a sui generis collectivity * French Polynesia, from 1946 to 2003, now an overseas collectivity * Saint Pierre and Miquelon, from 1946 to 1976 and 1985 to 2003, now an overseas collectivity * Wallis and Futuna, from 1961 to 2003, now an overseas collectivity * Mayotte, from 1974 to 2003, n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Third Republic
The French Third Republic (french: Troisième République, sometimes written as ) was the system of government adopted in France from 4 September 1870, when the Second French Empire collapsed during the Franco-Prussian War, until 10 July 1940, after the Fall of France during World War II led to the formation of the Vichy government. The early days of the Third Republic were dominated by political disruptions caused by the Franco-Prussian War of 1870–1871, which the Republic continued to wage after the fall of Emperor Napoleon III in 1870. Harsh reparations exacted by the Prussians after the war resulted in the loss of the French regions of Alsace (keeping the Territoire de Belfort) and Lorraine (the northeastern part, i.e. present-day department of Moselle), social upheaval, and the establishment of the Paris Commune. The early governments of the Third Republic considered re-establishing the monarchy, but disagreement as to the nature of that monarchy and the rightfu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic City, New Jersey
Atlantic City, often known by its initials A.C., is a coastal resort city in Atlantic County, New Jersey, United States. The city is known for its casinos, boardwalk, and beaches. In 2020, the city had a population of 38,497.QuickFacts Atlantic City city, New Jersey . Accessed November 9, 2022. It was incorporated on May 1, 1854, from portions of Egg Harbor Township and [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halifax, Nova Scotia
Halifax is the capital and largest municipality of the Provinces and territories of Canada, Canadian province of Nova Scotia, and the largest municipality in Atlantic Canada. As of the 2021 Census, the municipal population was 439,819, with 348,634 people in its urban area. The regional municipality consists of four former municipalities that were Amalgamation (politics), amalgamated in 1996: History of Halifax (former city), Halifax, Dartmouth, Nova Scotia, Dartmouth, Bedford, Nova Scotia, Bedford, and Halifax County, Nova Scotia, Halifax County. Halifax is a major economic centre in Atlantic Canada, with a large concentration of government services and private sector companies. Major employers and economic generators include the Canadian Armed Forces, Department of National Defence, Dalhousie University, Nova Scotia Health Authority, Saint Mary's University (Halifax), Saint Mary's University, the Halifax Shipyard, various levels of government, and the Port of Halifax. Agricult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Azores
) , motto =( en, "Rather die free than subjected in peace") , anthem= ( en, "Anthem of the Azores") , image_map=Locator_map_of_Azores_in_EU.svg , map_alt=Location of the Azores within the European Union , map_caption=Location of the Azores within the European Union , subdivision_type=Sovereign state , subdivision_name=Portugal , established_title=Settlement , established_date=1432 , established_title3=Autonomous status , established_date3=30 April 1976 , official_languages=Portuguese , demonym= ( en, Azorean) , capital_type= Capitals , capital = Ponta Delgada (executive) Angra do Heroísmo (judicial) Horta (legislative) , largest_city = Ponta Delgada , government_type= Autonomous Region , leader_title1=Representative of the Republic , leader_name1=Pedro Manuel dos Reis Alves Catarino , leader_title2= President of the Legislative Assembly , leader_name2= Luís Garcia , leader_title3= President of the Regional Government , leader_name3=José Manuel Bolieiro , l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anisotropy
Anisotropy () is the property of a material which allows it to change or assume different properties in different directions, as opposed to isotropy. It can be defined as a difference, when measured along different axes, in a material's physical or mechanical properties (absorbance, refractive index, conductivity, tensile strength, etc.). An example of anisotropy is light coming through a polarizer. Another is wood, which is easier to split along its grain than across it. Fields of interest Computer graphics In the field of computer graphics, an anisotropic surface changes in appearance as it rotates about its geometric normal, as is the case with velvet. Anisotropic filtering (AF) is a method of enhancing the image quality of textures on surfaces that are far away and steeply angled with respect to the point of view. Older techniques, such as bilinear and trilinear filtering, do not take into account the angle a surface is viewed from, which can result in aliasing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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