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2003 Boumerdès Earthquake
The 2003 Boumerdès earthquake occurred on May 21 at in northern Algeria. The shock had a moment magnitude of 6.8 and a maximum Mercalli intensity of X (''Extreme''). The epicentre of the earthquake was located near the town of Thénia in Boumerdès Province, approximately 60 km east of the capital Algiers. The quake was the strongest to hit Algeria in more than twenty years – since 1980, when a magnitude 7.1 earthquake resulted in at least 2,633 deaths. Tectonic setting Northern Algeria is situated at the boundary between the African Plate and the Eurasian Plate, thus creating a zone of compression. This zone of compression manifests itself by several thrust and faults.Building performance in the Boumerdes, Algeria, Earthquake of May 21, 2003 ''Canadian Association for Earthquake ... [...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 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 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Geological Survey
The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization's work spans the disciplines of biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility. The agency was founded on March 3, 1879. The USGS is a bureau of the United States Department of the Interior; it is that department's sole scientific agency. The USGS employs approximately 8,670 people and is headquartered in Reston, Virginia. The USGS also has major offices near Lakewood, Colorado, at the Denver Federal Center, and Menlo Park, California. The current motto of the USGS, in use since August 1997, is "science for a changing world". The agency's previous slogan, adopted on the occasion of its hundredt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bab Ezzouar
Bab Ezzouar (; ar, باب الزوار, link=no) is a suburb of the city of Algiers in northern Algeria. It is one of Algiers fastest growing municipalities and has seen many hotels and commercial malls being raised in the area. Bab Ezzouar is also the location of the University of Science and Technology of Houari Boumediene (USTHB), which is one of the most prominent technological universities in Algeria. Geography Bab Ezzouar is located some east by south-east of Algiers city just south of Bordj El Kiffan. Access to the commune is by the N11 highway from Algiers which passes through the north of the commune and continues east to join the A1 highway just east of the commune. Many other local roads connect the commune to the surrounding districts. The commune is fully urban in nature. Transport The commune is served by the Algiers tramway which runs from the town to Bordj el Kiffan, including: * Yahia Boushaki tram stop Neighbouring communes and villages Urbanism Bab Ezzou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2003 Algeria Earthquake
3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious or cultural significance in many societies. Evolution of the Arabic digit The use of three lines to denote the number 3 occurred in many writing systems, including some (like Roman and Chinese numerals) that are still in use. That was also the original representation of 3 in the Brahmic (Indian) numerical notation, its earliest forms aligned vertically. However, during the Gupta Empire the sign was modified by the addition of a curve on each line. The Nāgarī script rotated the lines clockwise, so they appeared horizontally, and ended each line with a short downward stroke on the right. In cursive script, the three strokes were eventually connected to form a glyph resembling a with an additional stroke at the bottom: ३. The Indian digits spread to the Caliphate in the 9th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algiers Province
Algiers Province ( ar, ولاية الجزائر, ', ; french: wilaya d'Alger or ) is a province (wilayah) in Algeria, named after its capital, Algiers, which is also the national capital. It is adopted from the old French department of Algiers and has a population of about 3 million. It is the most densely populated province of Algeria, and also the smallest by area. Territory In 1984, Boumerdès Province and Tipaza Province were carved out of its territory. Administrative divisions Algiers province is coincident with the city of Algiers, and is divided into 13 districts, in turn subdivided into 57 ''communes'' or municipalities. Districts The districts, listed according to official numbering (from west to east), are: Communes The communes are: # Aïn Taya ( Ain-Taya) # Bab El Oued # Bab Ezzouar # Baba Hassen # Bachdjerrah (Bach Djerrah) # Bologhine ( Bouloghine) # Bordj El Bahri # Bordj El Kiffan ( Bordj El Kifan) # Bourouba # Casbah # Dar El Beïda # Douéra # Drar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Algeria
French Algeria (french: Alger to 1839, then afterwards; unofficially , ar, الجزائر المستعمرة), also known as Colonial Algeria, was the period of French colonisation of Algeria. French rule in the region began in 1830 with the invasion of Algiers and lasted until the end of the Algerian War of Independence in 1962. While the administration of Algeria changed significantly over the 132 years of French rule, the Mediterranean coastal region of Algeria, housing the vast majority of its population, was an integral part of France from 1848 until its independence. As one of France's longest-held overseas territories, Algeria became a destination for hundreds of thousands of European immigrants known as ''colons'', and later as . However, the indigenous Muslim population remained the majority of the territory's population throughout its history. Many estimates indicates that the native Algerian population fell by one-third in the years between the French invasion a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balearic Islands
The Balearic Islands ( es, Islas Baleares ; or ca, Illes Balears ) are an archipelago in the Balearic Sea, near the eastern coast of the Iberian Peninsula. The archipelago is an autonomous community and a province of Spain; its capital is Palma. The 2007 Statute of Autonomy designates the Balearic Islands as one of the ''nationalities'' of Spain. The official languages of the Balearic Islands are Catalan and Spanish. Its four largest islands are Mallorca, Menorca, Ibiza, and Formentera. Many of its minor islands and islets are close to the larger islands, including Cabrera, Dragonera, and S'Espalmador. The islands have a Mediterranean climate, and the four major islands are all popular tourist destinations. Ibiza, in particular, is known as an international party destination, attracting many of the world's most popular DJs to its nightclubs. The islands' culture and cuisine are similar to those of the rest of Spain but have their own distinctive features. Etymology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tsunami
A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions (including detonations, landslides, glacier calvings, meteorite impacts and other disturbances) above or below water all have the potential to generate a tsunami. Unlike normal ocean waves, which are generated by wind, or tides, which are in turn generated by the gravitational pull of the Moon and the Sun, a tsunami is generated by the displacement of water from a large event. Tsunami waves do not resemble normal undersea currents or sea waves because their wavelength is far longer. Rather than appearing as a breaking wave, a tsunami may instead initially resemble a rapidly rising tide. For this reason, it is often referred to as a tidal wave, although this usage is not favoured by the scientific community because it might give ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hussein Dey Bridge
Hussein, Hussain, Hossein, Hossain, Huseyn, Husayn, Husein or Husain (; ar, حُسَيْن ), coming from the triconsonantal root Ḥ-S-i-N ( ar, ح س ی ن, link=no), is an Arabic name which is the diminutive of Hassan, meaning "good", "handsome" or "beautiful". It is commonly given as a male given name, particularly among Shias. In Persian language contexts, the transliterations ''Ḥosayn, Hosayn,'' or ''Hossein'' are sometimes used. In the transliteration of Indo-Aryan languages, the forms "Hussain" or "Hossain" may be used. Other variants include ''Husein'', ''Husejin'', ''Husejn'', ''Husain'', ''Hussin'', ''Hussain'', ''Husayin'', ''Hussayin'', ''Hüseyin'', ''Husseyin'', ''Huseyn'', ''Hossain'', ''Hosein'', ''Husseyn'' (etc.). The Encyclopaedia of Islam, which follows a standardized way for transliterating Arabic names, used the form "Ḥusain" in its first edition and "Ḥusayn" in its second and third editions. This name was not used in the pre-Islamic perio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined. Globally, the ready-mix concrete industry, the largest segment of the concrete market, is projected to exceed $600 billion in revenue by 2025. This widespread use results in a number of environmental impacts. Most notably, the production process for cement produces large volumes of greenhouse gas emissions, leading to net 8% of global emissions. Other environmental concerns include widespread illegal sand mining, impacts on the surrounding environment such as increased surface runoff or urban heat island effect, and potential public health implications from toxic ingredients. Significant research and development is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steel Girders
A girder () is a support beam used in construction. It is the main horizontal support of a structure which supports smaller beams. Girders often have an I-beam cross section composed of two load-bearing ''flanges'' separated by a stabilizing ''web'', but may also have a box shape, Z shape, or other forms. Girders are commonly used to build bridges. A girt is a vertically aligned girder placed to resist shear loads. Small steel girders are rolled into shape. Larger girders (1 m/3 feet deep or more) are made as plate girders, welded or bolted together from separate pieces of steel plate. The Warren type girder replaces the solid web with an open latticework truss between the flanges. This arrangement combines strength with economy of materials, minimizing weight and thereby reducing loads and expense. Patented in 1848 by its designers James Warren and Willoughby Theobald Monzani, its structure consists of longitudinal members joined only by angled cross-members, formin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precast
Precast concrete is a construction product produced by casting concrete in a reusable mold or "form" which is then cured in a controlled environment, transported to the construction site and maneuvered into place; examples include precast beams, and wall panels for tilt up construction. In contrast, cast-in-place concrete is poured into site-specific forms and cured on site. Recently lightweight expanded polystyrene foam is being used as the cores of precast wall panels, saving weight and increasing thermal insulation. Precast stone is distinguished from precast concrete by the finer aggregate used in the mixture, so the result approaches the natural product. Overview Precast concrete is employed in both interior and exterior applications, from highway, bridge, and hi-rise projects to tilt-up building construction. By producing precast concrete in a controlled environment (typically referred to as a precast plant), the precast concrete is afforded the opportunity to proper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
