|
2006 Tonga Earthquake
The 2006 Tonga earthquake occurred on 4 May at with a moment magnitude of 8.0 and a maximum Mercalli intensity of VII (very strong). One injury occurred and a non-destructive tsunami was observed. Earthquake The National Oceanic and Atmospheric Administration's Pacific Tsunami Warning Center in Hawaii issued a warning 17 minutes after the earthquake for coastal areas around the Pacific. An hour later, the center downgraded the warning to only the region within 600 miles of the epicenter, and an hour after that, it canceled the alert. The earthquake was followed by a pair of large aftershocks the next day. Damage The event caused very limited damage. The previous large earthquake in Tonga, in 1977, was of a lower magnitude but resulted in more severe damage. A likely cause is that the 2006 quake generated other frequencies that only resulted in resonance in small items. In shops, cans and bottles fell from shelves. *The century-old Catholic church in Lapaha had new cracks in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Seismological Centre
The International Seismological Centre (ISC) is a non-governmental, nonprofit organisation charged with the final collection, definitive analysis and publication of global seismicity. The ISC was formed in 1964 as an international organisation independent of national governments that would carry on the work of the International Seismological Summary in collecting and analyzing seismic data from around the world, and particularly to handle increased flow of data from the World-Wide Standard Seismograph Network (WWSSN), also established that year. The ISC considers its prime task to be the collection and re-analysis of all available earthquake seismic date in order to produce definitive data on earthquakes. The ISC's catalog is considered "the most complete and authoritative final depository of global earthquake parameter data." Purpose The main scientific goal of the Centre is the definitive compilation of earthquake information and the readings on which they are based. Collecti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landslide
Landslides, also known as landslips, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, deep-seated grade (slope), slope failures, mudflows, and debris flows. Landslides occur in a variety of environments, characterized by either steep or gentle slope gradients, from mountain ranges to coastal cliffs or even underwater, in which case they are called submarine landslides. Gravity is the primary driving force for a landslide to occur, but there are other factors affecting slope stability that produce specific conditions that make a slope prone to failure. In many cases, the landslide is triggered by a specific event (such as a heavy rainfall, an earthquake, a slope cut to build a road, and many others), although this is not always identifiable. Causes Landslides occur when the slope (or a portion of it) undergoes some processes that change its condition from stable to unstable. This is essentially due to a decrease in the She ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2006 In Tonga ...
The following lists events that happened during 2006 in the Kingdom of Tonga. Events July * July 1 - A man is arrested after crashing a car into the gates of King Taufa'ahau Tupou IV's residence in Auckland, New Zealand. References {{Year in Oceania, 2006 2000s in Tonga Years of the 21st century in Tonga Tonga Tonga Tonga (, ; ), officially the Kingdom of Tonga ( to, Puleʻanga Fakatuʻi ʻo Tonga), is a Polynesian country and archipelago. The country has 171 islands – of which 45 are inhabited. Its total surface area is about , scattered over in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2006 Earthquakes
Earthquakes in 2006 resulted in about 6,602 fatalities. The 2006 Yogyakarta earthquake was the deadliest with 5,749 fatalities. The 2006 Kuril Islands earthquake was the largest in 2006 at 8.3 on the moment magnitude scale. The 2006 Pangandaran earthquake and tsunami caused a significant tsunami that killed 730 people. Other significant earthquakes in 2006 struck Iran, Taiwan, China, Argentina, and Tajikistan. Compared to other years Overall By death toll * Note: At least 10 dead By magnitude * Note: At least 7.0 magnitude By month January * A magnitude 7.4 earthquake struck east of South Sandwich Islands, on January 2, at a depth of 33 km. * A magnitude 7.2 earthquake struck Fiji, on January 2, at a depth of 520 km. * A magnitude 6.6 earthquake struck Gulf of California, on January 4, at a depth of 10 km. * A magnitude 6.1 earthquake struck south of Panama, on January 6, at a depth of 10 km. * A 2006 Greece earthquake, magnitude 6.7 earthquake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megathrust Earthquakes In Tonga
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 zon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In Tonga
This is a list of earthquakes in Tonga: Earthquakes References Sources * {{DEFAULTSORT:Earthquakes In Tonga Tonga Tonga (, ; ), officially the Kingdom of Tonga ( to, Puleʻanga Fakatuʻi ʻo Tonga), is a Polynesian country and archipelago. The country has 171 islands – of which 45 are inhabited. Its total surface area is about , scattered over in ... Earthquakes in Tonga Earthquakes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In 2006
Earthquakes in 2006 resulted in about 6,602 fatalities. The 2006 Yogyakarta earthquake was the deadliest with 5,749 fatalities. The 2006 Kuril Islands earthquake was the largest in 2006 at 8.3 on the moment magnitude scale. The 2006 Pangandaran earthquake and tsunami caused a significant tsunami that killed 730 people. Other significant earthquakes in 2006 struck Iran, Taiwan, China, Argentina, and Tajikistan. Compared to other years Overall By death toll * Note: At least 10 dead By magnitude * Note: At least 7.0 magnitude By month January * A magnitude 7.4 earthquake struck east of South Sandwich Islands, on January 2, at a depth of 33 km. * A magnitude 7.2 earthquake struck Fiji, on January 2, at a depth of 520 km. * A magnitude 6.6 earthquake struck Gulf of California, on January 4, at a depth of 10 km. * A magnitude 6.1 earthquake struck south of Panama, on January 6, at a depth of 10 km. * A magnitude 6.7 earthquake struck Peloponnese Pen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slab Detachment
In plate tectonics, slab detachment or slab break-off may occur during continent-continent or arc-continent collisions. When the continental margin of the subducting plate reaches the oceanic trench of the subduction zone, the more buoyant continental crust will in normal circumstances experience only a limited amount of subduction into the asthenosphere. The slab pull forces will, however, still be present and this normally leads to the breaking off or detachment of the descending slab from the rest of the plate. The isostatic response to the detachment of the downgoing slab is rapid uplift. Slab detachment is also followed by the upwelling of relatively hot asthenosphere to fill the gap created, leading in many cases to magmatism. The uncritical use of the slab-detachment model to explain disparate observations of magmatism, uplift and exhumation in continental collision zones has been criticised. Slab tears Detachment initiates at a particular point on the slab and will then ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Geophysical Research
The ''Journal of Geophysical Research'' is a peer-reviewed scientific journal. It is the flagship journal of the American Geophysical Union. It contains original research on the physical, chemical, and biological processes that contribute to the understanding of the Earth, Sun, and Solar System. It has seven sections: A (Space Physics), B (Solid Earth), C (Oceans), D (Atmospheres), E (Planets), F (Earth Surface), and G (Biogeosciences). All current and back issues are available online for subscribers. History The journal was originally founded under the name ''Terrestrial Magnetism'' by the American Geophysical Union's president Louis Agricola Bauer in 1896. It was renamed to ''Terrestrial Magnetism and Atmospheric Electricity'' in 1899 and in 1948 it acquired its current name. In 1980, three specialized sections were established: ''A: Space Physics'', ''B: Solid Earth'', and ''C: Oceans''. Subsequently, further sections have been added: ''D: Atmospheres'' in 1984, ''E: Planets'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tsunami Warning System
A tsunami warning system (TWS) is used to detect tsunamis in advance and issue the warnings to prevent loss of life and damage to property. It is made up of two equally important components: a network of sensors to detect tsunamis and a communications infrastructure to issue timely alarms to permit evacuation of the coastal areas. There are two distinct types of tsunami warning systems: international and regional. When operating, seismic alerts are used to instigate the watches and warnings; then, data from observed sea level height (either shore-based tide gauges or DART buoys) are used to verify the existence of a tsunami. Other systems have been proposed to augment the warning procedures; for example, it has been suggested that the duration and frequency content of t-wave energy (which is earthquake energy trapped in the ocean SOFAR channel) is indicative of an earthquake's tsunami potential. History and forecasting The first rudimentary system to alert communities of an im ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hunga (Vava'u)
''Hunga'' is a genus of plants in the family Chrysobalanaceae, described as a genus in 1979. They are native to New Guinea and New Caledonia. List of species # '' Hunga cordata'' Prance - New Caledonia # '' Hunga gerontogea'' (Schltr.) Prance - New Caledonia # ''Hunga guillauminii'' Prance - New Caledonia # ''Hunga lifouana'' (Däniker) Prance - New Caledonia, Loyalty Islands # ''Hunga longifolia'' Prance - Papua New Guinea # ''Hunga mackeeana'' Prance - New Caledonia # ''Hunga minutiflora'' (Baker f.) Prance - New Caledonia # ''Hunga myrsinoides'' (Schltr.) Prance - New Caledonia # ''Hunga novoguineensis'' Prance - Papua New Guinea # ''Hunga papuana'' (Baker f.) Prance - Papua New Guinea # ''Hunga rhamnoides ''Hunga'' is a genus of plants in the family Chrysobalanaceae, described as a genus in 1979. They are native to New Guinea and New Caledonia. List of species # ''Hunga cordata'' Prance - New Caledonia # ''Hunga gerontogea'' (Schltr.) Prance - ...'' (Guillaumin) Pra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
