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1692 Jamaica Earthquake
The 1692 Jamaica earthquake struck Port Royal, Jamaica, on 7 June. A stopped pocket watch found in the harbor during a 1959 excavation indicated that it occurred around 11:43 AM local time. Known as the "storehouse and treasury of the West Indies" and as the "wickedest city in the world", Port Royal was, at the time, a key city in colonial Jamaica and one of the busiest and wealthiest ports in the Americas, as well as a common home port for many of the privateers and pirates operating on the Caribbean Sea. The 1692 earthquake caused most of the city to sink below sea level. About 2,000 people died as a result of the earthquake and the following tsunami, and another 3,000 people died in the following days due to injuries and disease. Tectonic setting The island of Jamaica lies on the boundary between the Caribbean plate and the Gonâve microplate. The Gonâve microplate is a long strip of mainly oceanic crust formed by the Cayman spreading ridge within a strike-slip pul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moment Magnitude Scale
The moment magnitude scale (MMS; denoted explicitly with or Mwg, 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. was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude scale, 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 use the term "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 saturatethat 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 United State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transpression
In geology, transpression is a type of Strike-slip fault, strike-slip deformation that deviates from simple shear because of a simultaneous component of shortening perpendicular to the fault plane. This movement ends up resulting in oblique shear. It is generally very unlikely that a deforming body will experience "pure" shortening or "pure" strike-slip. The relative amounts of shortening and strike-slip can be expressed in the convergence angle alpha which ranges from zero (ideal strike-slip) to 90 degrees (ideal convergence). During shortening, unless material is lost, transpression produces vertical thickening in the crust. Transpression that occurs on a regional scale along Tectonic plate, plate boundaries is characterized by oblique convergence. More locally, transpression occurs within restraining bends in strike-slip Fault (geology), fault zones. Transpressional structures Transpressional shear zones are characterized by an association of structures that suggest zone-norma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeology
Archaeology or archeology is the study of human activity through the recovery and analysis of material culture. The archaeological record consists of Artifact (archaeology), artifacts, architecture, biofact (archaeology), biofacts or ecofacts, archaeological site, sites, and cultural landscapes. Archaeology can be considered both a social science and a branch of the humanities. It is usually considered an independent academic discipline, but may also be classified as part of anthropology (in North America – the four-field approach), history or geography. The discipline involves Survey (archaeology), surveying, Archaeological excavation, excavation, and eventually Post excavation, analysis of data collected, to learn more about the past. In broad scope, archaeology relies on cross-disciplinary research. Archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Principles Of Geology
''Principles of Geology: Being an Attempt to Explain the Former Changes of the Earth's Surface, by Reference to Causes Now in Operation'' is a book by the Scottish geologist Charles Lyell that was first published in 3 volumes from 1830 to 1833. Lyell used the theory of uniformitarianism to describe how the Earth's surface was changing over time. This theory was in direct contrast to the geological theory of catastrophism. Many individuals believed in catastrophism to allow room for religious beliefs. For example, the Genesis flood narrative could be described as a real geological event as catastrophism describes the changing of the Earth surface as one-time, violent events. Lyell challenged the believers of the catastrophic theory by studying Mount Etna in Sicily and describing the changes from one stratum to another and the fossil records within the rocks to prove that slow, gradual changes were the cause of the ever-changing Earth's surface. Lyell used geological evidence to de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landslide
Landslides, also known as landslips, rockslips or rockslides, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, mudflows, shallow or deep-seated slope failures 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 heavy rainfall, an earthquake, a slope cut to build a road, and many others), although this is not always identifiable. Landslides are frequently made worse by human development (such as urban sprawl) and resource exploitation (such as mining and deforestation). Land degradation freque ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spanish Town
Spanish Town (Jamaican Patois: Spain) is the capital and the largest town in the Parishes of Jamaica, parish of St. Catherine, Jamaica, St. Catherine in the historic county of Middlesex, Jamaica, Middlesex, Jamaica. It was the Spanish and British capital of Jamaica from 1534 until 1872. The town is home to numerous memorials, the Jamaica Archives and Records Department, national archives, and one of the oldest Anglican churches outside England (the others are in Virginia, Maryland, and Bermuda). History The Spanish settlement of Villa de la Vega was founded by the Spanish in 1534 as the capital of the colony. Later, it was also called Santiago de la Vega or St. Jago de la Vega. Indigenous Taíno people, Taino had been living in the area for approximately a millennium before this, but this was the first European habitation on the south of the island. When the Invasion of Jamaica, English conquered Jamaica in 1655, they renamed the settlement as Spanish Town in honour to the ori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kingston, Jamaica
Kingston is the Capital (political), capital and largest city of Jamaica, located on the southeastern coast of the island. It faces a natural harbour protected by the Palisadoes, a long spit (landform), sand spit which connects the town of Port Royal and Norman Manley International Airport to the rest of the island. Kingston is the largest English-speaking city south of the United States in the Western Hemisphere. The local government bodies of the parishes of Kingston Parish, Kingston and Saint Andrew Parish, Jamaica, Saint Andrew were amalgamated by the Kingston and St. Andrew Corporation Act of 1923, to form the Kingston and St. Andrew Corporation (KSAC). Greater Kingston, or the "Corporate Area" refers to those areas under the KSAC; however, it does not solely refer to Kingston Parish, which only consists of the old downtown and Port Royal. Kingston Parish had a population of 89,057, and St. Andrew Parish had a population of 573,369 in 2011 Kingston is only bordered by Sain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liguanea
Liguanea ( ) is an area of the island of Jamaica. Its name came from the language of the Arawak people who currently inhabit some of the island's rural areas in Cornwall County. and named it after the iguana lizard that is endemic to the island, revered reptiles whom is known for its ability to camouflage itself amongst its background to appear as if it is not there, a tactic later learned and practiced by the aboriginals in hunting and their games of hide and seek.. Geographically Liguanea was the whole parish of today's St. Andrew parish named St. Andrew after the English take over of the islands from the Spanish, the Liguanea Plains are the fertile flat lands of alluvium spreading south towards Kingston Harbour, but the area today now known as Liguanea is now only a small part of the Kingston Corporate Area, a section of itself and now named the parish of St Andrew. From a socioeconomic point of view, Liguanea is the name of a distinct commercial district: east to west, betwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Morgan
Sir Henry Morgan (; – 25 August 1688) was a Welsh privateer, plantation owner, and, later, the lieutenant governor of Jamaica. From his base in Port Royal, Jamaica, he and those under his command raided settlements and shipping ports on the Spanish Main, becoming wealthy as they did so. With the prize money and loot from the raids, Morgan purchased three large sugar plantations on Jamaica. Much of Morgan's early life is unknown; he was born in an area of Monmouthshire that is now part of the city of Cardiff. It is not known how he made his way to the West Indies, or how the Welshman began his career as a privateer. He was probably a member of a group of raiders led by Sir Christopher Myngs in the late 1650s during the Anglo-Spanish War. Morgan became a close friend of Sir Thomas Modyford, the Governor of Jamaica; as diplomatic relations between the Kingdom of England and Spain worsened in 1667, Modyford gave Morgan a letter of marque, or a licence, to attack and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palisadoes
Palisadoes (word apparently of Portuguese origin) is the thin tombolo of sand that serves as a natural protection for Kingston Harbour, Jamaica. Norman Manley International Airport and the historic town of Port Royal are both on Palisadoes. The privateer Henry Morgan Sir Henry Morgan (; – 25 August 1688) was a Welsh privateer, plantation owner, and, later, the lieutenant governor of Jamaica. From his base in Port Royal, Jamaica, he and those under his command raided settlements and shipping ports o ... was buried in Palisadoes cemetery, which sank beneath the sea after the 1692 earthquake. There are concerns that activities of sight seers who litter the place may lead to infestation by roaches. Some organisation have made efforts in 2023 to clean up the place to address possible pollution with plastics and infestation by roaches and rodents See also * Kingston Harbour References Headlands of Jamaica Ramsar sites in Jamaica Kingston, Jamaica T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frigate
A frigate () is a type of warship. In different eras, the roles and capabilities of ships classified as frigates have varied. The name frigate in the 17th to early 18th centuries was given to any full-rigged ship built for speed and maneuverability, intended to be used in scouting, escort and patrol roles. The term was applied loosely to ships varying greatly in design. In the second quarter of the 18th century, what is now generally regarded as the 'true frigate' was developed in France. This type of vessel was characterised by possessing only one armed deck, with an unarmed deck below it used for berthing the crew. Late in the 19th century (British and French prototypes were constructed in 1858), a type of powerful ironclad warships was developed, and because they had a single gun deck, the term 'frigate' was used to describe them. Later developments in ironclad ships rendered the 'frigate' designation obsolete and the term fell out of favour. During the Second World War ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soil Liquefaction
Soil liquefaction occurs when a cohesionless saturated or partially saturated soil substantially loses Shear strength (soil), strength and stiffness in response to an applied Shear stress, stress such as shaking during an earthquake or other sudden change in stress condition, in which material that is ordinarily a solid behaves like a liquid. In soil mechanics, the term "liquefied" was first used by Allen Hazen in reference to the 1918 failure of the Calaveras Dam in California. He described the mechanism of flow liquefaction of the embankment dam as: The phenomenon is most often observed in saturated, loose (low density or uncompacted), sandy soils. This is because a loose sand has a tendency to Compressibility, compress when a force, load is applied. Dense sands, by contrast, tend to expand in volume or 'Reynolds' dilatancy, dilate'. If the soil is saturated by water, a condition that often exists when the soil is below the water table or sea level, then water fills the gap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
