|
List Of Earthquakes In 1981
This is a list of earthquakes in 1981. Earthquakes of less than magnitude 6 are not included, unless they result in damage and/or casualties, or are notable for some other reason. Events in remote areas will not be listed but included in statistics and maps. Countries are entered on the lists in order of their status in this particular year. All dates are listed according to UTC time. Maximum intensities are indicated on the Modified Mercalli intensity scale and are sourced from United States Geological Survey (USGS) ShakeMap data. 1981 was another year of below average activity. The number of magnitude 7.0+ events was higher than in 1980, but at 10 was still below normal. The largest event was a magnitude 7.7 which struck Samoa in September. Other areas impacted by large events were Greece, New Zealand, Mexico, and Chile. Out of the 6,700 deaths in 1981, the majority were in Iran. Over the summer there were two large events there, each causing 3,000 deaths. In January, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquake
An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from those that are so weak that they cannot be felt, to those violent enough to propel objects and people into the air, damage critical infrastructure, and wreak destruction across entire cities. The seismic activity of an area is the frequency, type, and size of earthquakes experienced over a particular time period. The seismicity at a particular location in the Earth is the average rate of seismic energy release per unit volume. The word ''tremor'' is also used for Episodic tremor and slip, non-earthquake seismic rumbling. At the Earth's surface, earthquakes manifest themselves by shaking and displacing or disrupting the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1981 Gulf Of Corinth Earthquakes
In early 1981 the eastern Gulf of Corinth, Greece was struck by three earthquakes with a magnitude greater than 6 over a period of 11 days. The earthquake sequence caused widespread damage in the Corinth–Athens area, destroying nearly 8,000 houses and causing 20–22 deaths. Tectonic setting The Gulf of Corinth is an area of active extensional tectonics. The underlying cause of this extension has been attributed to rollback of the African Plate as it subducts northwards beneath the Aegean Plate. Other possible mechanisms include gravitational collapse of crust overthickened during the Paleogene to early Neogene or the effects of the continuing propagation of the North Anatolian Fault towards the southwest. The rift that formed the Gulf of Corinth is bounded by large normal faults that vary in their polarity ( dip direction) along its length. The eastern end of the rift, which forms the Alkyonides Gulf, is dominated by north-dipping faults, including the Perachora, Straya, Ski ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alaska
Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., it borders the Canadian province of British Columbia and the Yukon territory to the east; it also shares a maritime border with the Russian Federation's Chukotka Autonomous Okrug to the west, just across the Bering Strait. To the north are the Chukchi and Beaufort Seas of the Arctic Ocean, while the Pacific Ocean lies to the south and southwest. Alaska is by far the largest U.S. state by area, comprising more total area than the next three largest states (Texas, California, and Montana) combined. It represents the seventh-largest subnational division in the world. It is the third-least populous and the most sparsely populated state, but by far the continent's most populous territory located mostly north of the 60th parallel, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Near Islands
The Near Islands or Sasignan Islands ( ale, Sasignan tanangin, russian: Ближние острова) are a group of American islands in the Aleutian Islands in southwestern Alaska, between the Russian Commander Islands to the west and the Rat Islands to the east. Geography The largest of the Near Islands are Attu and Agattu, which shelter a few rocks in the channel between them. The other important islands are the Semichi Islands to their northeast, notable among which are Alaid Island (Alaska), Alaid, Nizki Island, Nizki and Shemya Island, Shemya. About 20 miles to the east-southeast from Shemya are small rocky reefs known as the Ingenstrem Rocks. The total land area of all of the Near Islands is 1,143.785 km² (441.618 sq mi), and their total population was 47 persons as of the United States Census, 2000, 2000 census. The only populated island is Shemya; the Attu Station, Alaska, U.S. Coast Guard station on Attu closed in 2010 and all inhabitants left the island late ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kermadec Islands
The Kermadec Islands ( mi, Rangitāhua) are a subtropical island arc in the South Pacific Ocean northeast of New Zealand's North Island, and a similar distance southwest of Tonga. The islands are part of New Zealand. They are in total area and uninhabited, except for the permanently manned Raoul Island Station, the northernmost outpost of New Zealand. The islands are listed with the New Zealand outlying islands. The islands are an immediate part of New Zealand, but not part of any region or district, but instead an ''Area Outside Territorial Authority''. Toponymy The islands were named after the Breton captain Jean-Michel Huon de Kermadec, who visited the islands as part of the d'Entrecasteaux expedition in the 1790s. The topographic particle "Kermadec" is of Breton origin and is a lieu-dit in Pencran in Finistère where '' ker'' means village, residence and madec a proper name derived from '' mad'' (which means 'good') with the suffix '' -ec'', used to form adjectives in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegean Sea
The Aegean Sea ; tr, Ege Denizi (Greek language, Greek: Αιγαίο Πέλαγος: "Egéo Pélagos", Turkish language, Turkish: "Ege Denizi" or "Adalar Denizi") is an elongated embayment of the Mediterranean Sea between Europe and Asia. It is located between the Balkans and Anatolia, and covers an area of some 215,000 square kilometres. In the north, the Aegean is connected to the Marmara Sea and the Black Sea by the straits of the Dardanelles and the Bosphorus. The Aegean Islands are located within the sea and some bound it on its southern periphery, including Crete and Rhodes. The sea reaches a maximum depth of 2,639m to the west of Karpathos. The Thracian Sea and the Sea of Crete are main subdivisions of the Aegean Sea. The Aegean Islands can be divided into several island groups, including the Dodecanese, the Cyclades, the Sporades, the Saronic Islands, Saronic islands and the North Aegean islands, North Aegean Islands, as well as Crete and its surrounding islands. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valparaíso Region
The Valparaíso Region ( es, Región de Valparaíso, links=no, ) is one of Chile's 16 first order administrative divisions.Valparaíso Region, 2006 With the country's second-highest population of 1,790,219 , and fourth-smallest area of , the region is Chile's second most densely populated after the Santiago Metropolitan Region to the southeast. The region also includes the remote Easter Island (Rapa Nui) in the Pacific Ocean. Its capital is the port city of Valparaíso; other important cities include Viña del Mar, Quillota, San Felipe, Quilpué, Villa Alemana, and San Antonio. Administration As a region, Valparaíso is a first-level administrative division. Since 2021 the region is governed by the governor, who is elected by popular vote. The current governor is Rodrigo Mundaca ( Broad Font). Geography and natural features The region is on the same latitude as the Santiago Metropolitan Region. Its capital is Valparaíso, which is the site for the National Congre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1981 Playa Azul Earthquake
The 1981 Playa Azul earthquake occurred on October 24, 1981, at 21:22 local time (03:22 UTC on October 25). It was located near Playa Azul, Michoacán, Mexico. The magnitude of the earthquake was 7.2, or 7.3. Three deaths were reported, two from Michoacán and one from Mexico City. Some buildings were damaged in both Michoacán and Mexico City. A small tsunami was registered in Acapulco with a maximum height of 9 cm. Tectonic setting The southwestern coast of Mexico lies above the convergent boundary where the Rivera Plate and Cocos Plate are being subducted beneath the North American Plate along the Middle America Trench. The area is seismically very active with large thrust type earthquakes occurring along the plate interface and normal fault type earthquakes occurring at a somewhat deeper level within the descending slab. The plate interface seismicity in this area is strongly segmented, with separate Jalisco, Michoacán, Guerrero and Colima segments being recogni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Island
The South Island, also officially named , is the larger of the two major islands of New Zealand in surface area, the other being the smaller but more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman Sea, and to the south and east by the Pacific Ocean. The South Island covers , making it the world's 12th-largest island. At low altitude, it has an oceanic climate. The South Island is shaped by the Southern Alps which run along it from north to south. They include New Zealand's highest peak, Aoraki / Mount Cook at . The high Kaikōura Ranges lie to the northeast. The east side of the island is home to the Canterbury Plains while the West Coast is famous for its rough coastlines such as Fiordland, a very high proportion of native bush and national parks, and the Fox and Franz Josef Glaciers. The main centres are Christchurch and Dunedin. The economy relies on agriculture and fishing, tourism, and general manufacturing and services. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mercalli Intensity Scale
The Modified Mercalli intensity scale (MM, MMI, or MCS), developed from Giuseppe Mercalli's Mercalli intensity scale of 1902, is a seismic intensity scale used for measuring the intensity of shaking produced by an earthquake. It measures the effects of an earthquake at a given location, distinguished from the earthquake's inherent force or strength as measured by seismic magnitude scales (such as the "" magnitude usually reported for an earthquake). While shaking is caused by the seismic energy released by an earthquake, earthquakes differ in how much of their energy is radiated as seismic waves. Deeper earthquakes also have less interaction with the surface, and their energy is spread out across a larger volume. Shaking intensity is localized, generally diminishing with distance from the earthquake's epicenter, but can be amplified in sedimentary basins and certain kinds of unconsolidated soils. Intensity scales empirically categorize the intensity of shaking based on the effect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huancavelica Region
Huancavelica () is a department and region in Peru with an area of and a population of 347,639 ( 2017 census). The capital is the city Huancavelica. The region is bordered by the departments of Lima and Ica in the west, Junín in the north, and Ayacucho in the east. Political division The department is divided into seven provinces. Province (Capital) # Acobamba Province ( Acobamba) # Angaraes Province ( Lircay) # Castrovirreyna Province (Castrovirreyna) # Churcampa Province (Churcampa) # Huancavelica Province (Huancavelica) # Huaytará Province (Huaytará) # Tayacaja Province (Pampas) The main cities are Huancavelica, Pampas and Lircay. There are many little districts like Querco in Huancavelica. Querco is a nice little town. Most of the residents are agricultors. They own cattle, sheep, pigs, horses, mules, llamas, goats, chickens, and donkeys. Demographics The region is mostly inhabited by indigenous people of Quechua descent. Languages According to the 2007 Peru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campania
Campania (, also , , , ) is an administrative Regions of Italy, region of Italy; most of it is in the south-western portion of the Italian peninsula (with the Tyrrhenian Sea to its west), but it also includes the small Phlegraean Islands and the island of Capri. The capital of the Campania region is Naples. As of 2018, the region had a population of around 5,820,000 people, making it Italy's third most populous region, and, with an area of , its most densely populated region. Based on its Gross domestic product, GDP, Campania is also the most economically productive region in southern Italy List of Italian regions by GDP, and the 7th most productive in the whole country. Naples' urban area, which is in Campania, is the List of urban areas in the European Union, eighth most populous in the European Union. The region is home to 10 of the 58 List of World Heritage Sites in Italy, UNESCO sites in Italy, including Pompeii and Herculaneum, the Royal Palace of Caserta, the Amalfi Coast and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> South Island")
