1.
Fujita scale
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The Fujita scale, or Fujita–Pearson scale, is a scale for rating tornado intensity, based primarily on the damage tornadoes inflict on human-built structures and vegetation. The F-Scale was replaced with the Enhanced Fujita scale in the United States in February 2007, in April 2013, Canada adopted the EF-Scale over the Fujita scale, although tornado frequency is relatively low in the country. However, EC uses 31 Specific Damage Indicators in their ratings, the scale was introduced in 1971 by Tetsuya Fujita of the University of Chicago, in collaboration with Allen Pearson, head of the National Severe Storms Forecast Center/NSSFC. The scale was updated in 1973, taking into account path length and width, in the United States, starting in 1973, tornadoes were rated soon after occurrence. The Fujita scale was applied retroactively to tornadoes reported between 1950 and 1972 in the National Oceanic and Atmospheric Administration National Tornado Database, Fujita rated tornadoes from 1916–1992 and Tom Grazulis of The Tornado Project retroactively rated all known significant tornadoes in the U. S. back to 1880. The Fujita scale was adopted in most areas outside of Great Britain, in 2007, the Fujita scale was updated, and the Enhanced Fujita Scale was introduced in the United States. The new scale more accurately matches wind speeds to the severity of damage caused by the tornado, though each damage level is associated with a wind speed, the Fujita scale is effectively a damage scale, and the wind speeds associated with the damage listed arent rigorously verified. The Enhanced Fujita Scale was formulated due to research which suggested that the speeds required to inflict damage by intense tornadoes on the Fujita scale are greatly overestimated. A process of expert elicitation with top engineers and meteorologists resulted in the EF scale wind speeds, however, the EF scale also improved damage parameter descriptions. The original scale as derived by Fujita was a theoretical 13-level scale designed to connect the Beaufort scale. F1 corresponds to the level of the Beaufort scale. F0 was placed at a position specifying no damage, in analogy to how the Beauforts zeroth level specifies little to no wind. From these wind speed numbers, qualitative descriptions of damage were made for each category of the Fujita scale, the diagram on the right illustrates the relationship between the Beaufort, Fujita, and Mach number scales. Fujita intended that only F0–F5 be used in practice, as this all possible levels of damage to frame homes as well as the expected estimated bounds of wind speeds. Furthermore, the wind speed numbers have since been found to be higher than the actual wind speeds required to incur the damage described at each category. The error manifests itself to a degree as the category increases. Precise wind speed numbers are actually guesses and have never been scientifically verified, different wind speeds may cause similar-looking damage from place to place—even from building to building. Without a thorough engineering analysis of damage in any event
2.
Eastern United States
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It is geographically diverse, spanning the Northeast and Southeast as well as the eastern part of the Central United States. In 2011 the 26 states east of the Mississippi had an population of 179,948,346 or 58. 28% of the total U. S. population of 308,745,358. The Southern United States constitutes a region in the south-eastern. In the last few decades, the Southern US has been attracting internal and international migrants, the American South is among the fastest-growing areas in the United States. In one of the earliest English settlements in the New World, English Pilgrims from Europe first settled in New England in 1620, New England produced the first examples of American literature and philosophy and was home to the beginnings of free public education. In the 19th century, it played a prominent role in the movement to abolish slavery in the United States and it was the first region of the United States to be transformed by the Industrial Revolution. The Midwestern United States is one of the four regions within the United States that are recognized by the United States Census Bureau. The region consists of seven states in the central and inland northeastern US, Illinois, Indiana, Iowa, Michigan, Minnesota, Ohio, a 2006 Census Bureau estimate put the population at 66,217,736. Both the geographic center of the contiguous U. S. the United States Census Bureau divides this region into the East North Central States and the West North Central States. Chicago is the largest city in the region, followed by Indianapolis, chicago has the largest metropolitan statistical area, followed by Detroit, and Minneapolis – Saint Paul. Marie, Michigan is the oldest city in the region, having been founded by French missionaries, the term Midwest has been in common use for over 100 years. Another term sometimes applied to the general region is the heartland. Other designations for the region have fallen into disuse, such as the Northwest or Old Northwest, since the book Middletown appeared in 1929, sociologists have often used Midwestern cities as typical of the entire nation. The region has a higher ratio than the Northeast, the West. Four of the associated with the Midwestern United States are traditionally referred to as belonging to the Great Plains region. However, in recent years they are included in the Midwestern region. The following is a list of the 24 largest cities in the East by population, East Coast of the United States Eastern Canada Territories of the United States on stamps
3.
Appalachian Mountains
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The Appalachian Mountains, often called the Appalachians, are a system of mountains in eastern North America. The Appalachians first formed roughly 480 million years ago during the Ordovician Period and it once reached elevations similar to those of the Alps and the Rocky Mountains before naturally occurring erosion. The Appalachian chain is a barrier to east-west travel, as it forms a series of alternating ridgelines, definitions vary on the precise boundaries of the Appalachians. A common variant definition does not include the Adirondack Mountains, which belong to the Grenville Orogeny and have a different geological history from the rest of the Appalachians. The range covers parts of the islands of Saint Pierre and Miquelon, the system is divided into a series of ranges, with the individual mountains averaging around 3,000 ft. The highest of the group is Mount Mitchell in North Carolina at 6,684 feet, the term Appalachian refers to several different regions associated with the mountain range. Most broadly, it refers to the mountain range with its surrounding hills. The Ouachita Mountains in Arkansas and Oklahoma were originally part of the Appalachians as well, the name was soon altered by the Spanish to Apalachee and used as a name for the tribe and region spreading well inland to the north. Pánfilo de Narváezs expedition first entered Apalachee territory on June 15,1528, now spelled Appalachian, it is the fourth-oldest surviving European place-name in the US. After the de Soto expedition in 1540, Spanish cartographers began to apply the name of the tribe to the mountains themselves. The first cartographic appearance of Apalchen is on Diego Gutierrezs map of 1562, the name was not commonly used for the whole mountain range until the late 19th century. A competing and often more popular name was the Allegheny Mountains, Alleghenies, in the early 19th century, Washington Irving proposed renaming the United States either Appalachia or Alleghania. In U. S. dialects in the regions of the Appalachians. In northern parts of the range, it is pronounced /ˌæpəˈleɪtʃᵻnz/ or /ˌæpəˈleɪʃᵻnz/, the third syllable is like lay. There is often debate between the residents of the regions as to which pronunciation is the more correct one. Elsewhere, a commonly accepted pronunciation for the adjective Appalachian is /ˌæpəˈlætʃiən/, the whole system may be divided into three great sections, Northern, The northern section runs from the Canadian province of Newfoundland and Labrador to the Hudson River. The Monteregian Hills, which cross the Green Mountains in Quebec, are also unassociated with the Appalachians, Central, The central section goes from the Hudson Valley to the New River running through Virginia and West Virginia. Southern, The southern section runs from the New River onwards and it consists of the prolongation of the Blue Ridge, which is divided into the Western Blue Ridge Front and the Eastern Blue Ridge Front, the Ridge-and-Valley Appalachians, and the Cumberland Plateau
4.
Appalachia
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Appalachia is a cultural region in the Eastern United States that stretches from the Southern Tier of New York to northern Alabama, Mississippi and Georgia. As of the 2010 United States Census, the region was home to approximately 25 million people, sociological studies in the 1960s and 1970s helped to re-examine and dispel these stereotypes. While endowed with abundant natural resources, Appalachia has long struggled, by 1990, Appalachia had largely joined the economic mainstream, but still lagged behind the rest of the nation in most economic indicators. Since Appalachia lacks definite physiographical or topographical boundaries, there has been disagreement over what exactly the region encompasses. The most commonly used definition of Appalachia is the one initially defined by the Appalachian Regional Commission in 1965. When the Commission was established, counties were added based on economic need, in 1921, John C. Campbell published The Southern Highlander and His Homeland in which he modified Frosts map to include 254 counties in 9 states. A landmark survey of the region in the decade by the United States Department of Agriculture defined the region as consisting of 206 counties in 6 states. In 1984, Karl Raitz and Richard Ulack expanded the ARCs definition to include 445 counties in 13 states, although they removed all counties in Mississippi and added two in New Jersey. The name was altered by the Spanish to Apalachee and used as a name for the tribe. Pánfilo de Narváezs expedition first entered Apalachee territory on June 15,1528, now spelled Appalachian, it is the fourth oldest surviving European place-name in the U. S. After the de Soto expedition in 1540, Spanish cartographers began to apply the name of the tribe to the mountains themselves. The first cartographic appearance of Apalchen is on Diego Gutiérrez map of 1562, le Moyne was also the first European to apply Apalachen specifically to a mountain range as opposed to a village, native tribe, or a southeastern region of North America. The name was not commonly used for the mountain range until the late 19th century. A competing and often more popular name was the Allegheny Mountains, Alleghenies, in the early 19th century, Washington Irving proposed renaming the United States either Appalachia or Alleghania. In northern U. S. dialects, the mountains are pronounced /æpəˈleɪtʃənz/ or /æpəˈleɪʃənz/, the cultural region of Appalachia is pronounced /æpəˈleɪʃə/, also /æpəˈleɪtʃə/, all with a third syllable like lay. In southern U. S. dialects, the mountains are called the /æpəˈlætʃənz/, and this pronunciation is favored in the core region in central and southern parts of the Appalachian range. The occasional use of the sh sound for the ch in the last syllable in northern dialects was popularized by Appalachian Trail organizations in New England in the early 20th century, Native American hunter-gatherers first arrived in what is now Appalachia over 16,000 years ago. The earliest discovered site is the Meadowcroft Rockshelter in Washington County, several other Archaic period archaeological sites have been identified in the region, such as the St. Albans site in West Virginia and the Icehouse Bottom site in Tennessee
5.
Scott County, Virginia
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Scott County is a county located in the U. S. state of Virginia. As of the 2010 census, the population was 23,177 and its county seat is Gate City. Scott County was formed by an act of the General Assembly on November 24,1814 from parts of Washington, Lee, the early settlers found evidence of a former native village at the mouth of Stony Creek on the Clinch river. Thomas McCulloch was the first white settler within the county, in 1769, daniel Boone commanded several forts located here in 1774 during Dunmores War, and several more were built in successive years. Even so, the Chickamauga Cherokee leader Bob Benge remained active in the area throughout this time, during the Cherokee–American wars, by the times houses were built in the 1790s, the largely Scots-Irish population had increased by reason of its situation along the Wilderness Road. After Scott County was formed in 1814, the first court took place in 1815, and the first public schools in 1870. According to the U. S. Census Bureau, the county has an area of 539 square miles. 97. 9% were White,0. 6% Black or African American,0. 2% Native American,0. 2% Asian,0. 1% Pacific Islander,0. 4% of some other race and 0.7 of two or more races. As of the census of 2000, there were 23,403 people,9,795 households, the population density was 44 people per square mile. There were 11,355 housing units at a density of 21 per square mile. The racial makeup of the county was 98. 51% White,0. 59% Black or African American,0. 14% Native American,0. 07% Asian,0. 02% Pacific Islander,0. 15% from other races, and 0. 52% from two or more races. 0. 42% of the population were Hispanic or Latino of any race,26. 10% of all households were made up of individuals and 13. 10% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the family size was 2.82. In the county, the population was out with 20. 60% under the age of 18,7. 50% from 18 to 24,27. 30% from 25 to 44,26. 80% from 45 to 64. The median age was 41 years, for every 100 females there were 93.30 males. For every 100 females age 18 and over, there were 90.70 males, the median income for a household in the county was $27,339, and the median income for a family was $33,163. Males had an income of $28,328 versus $20,553 for females. The per capita income for the county was $15,073, about 13. 00% of families and 16. 80% of the population were below the poverty line, including 20. 10% of those under age 18 and 20. 50% of those age 65 or over
6.
Culpeper, Virginia
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Culpeper is the only incorporated town in Culpeper County, Virginia, United States. The population was 16,379 at the 2010 census, up from 9,664 at the 2000 census and it is the county seat of Culpeper County. Culpeper is located at 38°28′19″N 77°59′57″W, according to the United States Census Bureau, the town has a total area of 6.8 square miles, of which 6.7 square miles is land and 0.04 square mile is water. After forming Culpeper County, Virginia, in 1748, the Virginia House of Burgesses voted to establish the Town of Fairfax on February 22,1759, the original plan of the town called for ten blocks, which form the core of Culpepers downtown area today. The original town was surveyed by a young George Washington, in 1795, the town received a post office under the name Culpeper Court House, although most maps continued to show the Fairfax name. During the American Revolutionary War, the Culpeper Minutemen, a pro-Independence militia and they organized in what was then known as Claytons Old Field, near todays Yowell Meadow Park. During the Civil War, Culpeper was a crossroads for a number of marching through central Virginia. In the heart of downtown, the home of Confederate General A. P. Hill stands at the corner of Main. One block north on Main St. was the house where The Gallant Major John Pelham died after sustaining a wound at the battle of Kelleys Ford. Culpeper began to grow dramatically in the 1980s, becoming a community of more densely populated Northern Virginia and Washington. A growing number of residents of the town and county of Culpeper once lived, in 2011, East Davis Street in downtown Culpeper was named as a 2011 Americas Great Place by the American Planning Association. Downtown Culpeper was one of the communities most affected by the August 23,2011 Virginia earthquake, several buildings along Main Street and East Davis Street suffered structural damage, and some have been condemned. The earthquake led to the evacuation of the Packard Campus for Audio-Visual Conservation. In 2014 the Museum of Culpeper History moved into the historic train depot. As of the 2010 Census, the makeup of the town was 61. 5% White,21. 9% Black,0. 6% Native American,2. 1% Asian,0. 01% Pacific Islander. Hispanic or Latino of any race were 17. 0% of the population. The towns population included 25. 7% under the age of 18,10. 0% from 18 to 24,30. 3% from 25 to 44,19. 0% from 45 to 64, the median age was 35 years. For every 100 females there were 87.9 males, for every 100 females age 18 and over, there were 82.9 males
7.
Oklahoma
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Oklahoma is a state located in the South Central United States. Oklahoma is the 20th-most extensive and the 28th-most populous of the 50 United States, the states name is derived from the Choctaw words okla and humma, meaning red people. The name was settled upon statehood, Oklahoma Territory and Indian Territory were merged, on November 16,1907, Oklahoma became the 46th state to enter the union. Its residents are known as Oklahomans, or informally Okies, and its capital, a major producer of natural gas, oil, and agricultural products, Oklahoma relies on an economic base of aviation, energy, telecommunications, and biotechnology. In 2007, it had one of the economies in the United States, ranking among the top states in per capita income growth. Oklahoma City and Tulsa serve as Oklahomas primary economic anchors, with nearly two-thirds of Oklahomans living within their metropolitan statistical areas. With small mountain ranges, prairie, mesas, and eastern forests, most of Oklahoma lies in the Great Plains, Cross Timbers, interior Highlands—a region especially prone to severe weather. The name Oklahoma comes from the Choctaw phrase okla humma, literally meaning red people, equivalent to the English word Indian, okla humma was a phrase in the Choctaw language used to describe Native American people as a whole. Oklahoma later became the de facto name for Oklahoma Territory, and it was approved in 1890. Oklahoma is the 20th-largest state in the United States, covering an area of 69,898 square miles and it is one of six states on the Frontier Strip and lies partly in the Great Plains near the geographical center of the 48 contiguous states. It is bounded on the east by Arkansas and Missouri, on the north by Kansas, on the northwest by Colorado, on the far west by New Mexico, much of its border with Texas lies along the Southern Oklahoma Aulacogen, a failed continental rift. The geologic figure defines the placement of the Red River, the Oklahoma panhandles Western edge is out of alignment with its Texas border. The Oklahoma/New Mexico border is actually 2.1 to 2.2 miles east of the Texas line, the border between Texas and New Mexico was set first as a result of a survey by Spain in 1819. It was then set along the 103rd Meridian, in the 1890s, when Oklahoma was formally surveyed using more accurate surveying equipment and techniques, it was discovered the Texas line was not set along the 103rd Meridian. Surveying techniques were not as accurate in 1819, and the actual 103rd Meridian was approximately 2.2 miles to the east and it was much easier to leave the mistake than for Texas to cede land to New Mexico to correct the surveying error. The placement of the Oklahoma/New Mexico border represents the true 103rd Meridian, cimarron County in Oklahomas panhandle is the only county in the United States that touches four other states, New Mexico, Texas, Colorado and Kansas. Its highest and lowest points follow this trend, with its highest peak, Black Mesa, at 4,973 feet above sea level, situated near its far northwest corner in the Oklahoma Panhandle. The states lowest point is on the Little River near its far southeastern boundary near the town of Idabel, Oklahoma, which dips to 289 feet above sea level
8.
Van Buren, Arkansas
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Van Buren /væn ˈbjʊərən/ is the second largest city in the Fort Smith, Arkansas-Oklahoma Metropolitan Statistical Area and the county seat of Crawford County, Arkansas, United States. The city is located directly northeast of Fort Smith at the Interstate 40 - Interstate 540 junction, the city was incorporated in 1845 and as of the 2010 census had a population of 22,791, ranking it as the states 22nd largest city, behind Searcy. The area was settled by David Boyd and Thomas Martin in 1818, after Arkansas became a territory in 1819 Daniel and Thomas Phillips constructed a lumber yard in the community to serve as a fuel depot for traffic along the Arkansas River. In 1831 a post office was constructed for the community, at the known as Phillips Landing. This post office was named after the newly appointed Secretary of State, john Drennen, along with his partner David Thompson, purchased the area for US$11,000. They moved their business of supplying firewood for steamboats to this new location on higher ground, the courthouse was constructed on a lot of land donated by Drennen on the condition that Van Buren become the county seat. The Drennen Reserve is one of the existing historical sites from the 1830s. Van Buren was incorporated on January 4,1845, on December 28,1862, Federal and Confederate forces clashed in and around Van Buren resulting in a defeat for Major-General T. C. Hindman, driving him south across the river with minimal casualties, Federal forces captured 100 prisoners, as stated in an official report by U. S. Major-General Samuel R. Curtis. On April 21,1996, at 11,12 p. m. a category F3 tornado hit the Fort Smith/Van Buren area causing extensive damage. The tornado, which spawned in Oklahoma and crossed into west Fort Smith near the confluence of the Arkansas and Poteau rivers, killed 2, injured 89, the fatalities were small children from Fort Smith. At its worst, the tornado was one mile across. The total distance it traveled on the ground was 7 miles, in total, there were around 1,800 homes damaged, the majority of which were in Van Buren. Van Buren is located in the southwest corner of Crawford County at 35°26′40″N 94°20′48″W, the Arkansas–Oklahoma state line is 2 miles to the west. The Arkansas River forms the boundary of the city, separating it from Fort Smith of Sebastian County. Lee Creek flows through the side of the city into the Arkansas River. According to the United States Census Bureau, Van Buren has an area of 16.5 square miles, of which 15.4 square miles is land and 1.0 square mile. Van Buren lies within a subtropical climate area
