2019–20 Puerto Rico Earthquakes
Starting on December 28, 2019, and progressing into 2020, the southwestern part of the island of Puerto Rico was struck by an earthquake swarm,''Magnitude 5.9 earthquake rocks Puerto Rico and causes landslide in Peñuelas.''
Grace Hauck. ''USA Today''. 11 January 2020. Retrieved 14 January 2020. including 11 that were of magnitude 5 or greater. The largest and most damaging of this sequence was a magnitude 6.4 , which occurred on January 7 at 04:24 Atlantic Time Zone, AST (08:24 Coordinated Universal Time, UTC), with a maximum felt intensity of VIII (''Severe'') on the Modified Mercalli intensity scale. At lea ...
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Atlantic Time Zone
The Atlantic Time Zone is a geographical region that keeps standard time—called Atlantic Standard Time (AST)—by subtracting four hours from Coordinated Universal Time ( UTC), resulting in UTC−04:00. AST is observed in parts of North America including several Caribbean islands. During part of the year, some portions of the zone observe daylight saving time, referred to as Atlantic Daylight Time (ADT), by moving their clocks forward one hour to UTC−03:00. The clock time in this zone is based on the mean solar time of the 60th meridian west of the Greenwich Observatory. In Canada, the provinces of New Brunswick, Nova Scotia, and Prince Edward Island are in this zone, though legally they calculate time specifically as an offset of four hours from Greenwich Mean Time (GMT–4) rather than from UTC. Small portions of Quebec (eastern Côte-Nord and the Magdalen Islands) also observe Atlantic Time. Officially, the entirety of Newfoundland and Labrador observes Newfoundland St ...
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Oblique Subduction
Oblique subduction is a form of subduction (i.e. a tectonic process involving the convergence of two Tectonic plate, plates where the denser plate descends into Earth's interior) for which the convergence direction differs from 90° to the plate boundary. Most Convergent boundary, convergent boundaries involve oblique subduction, particularly in the Ring of Fire including the Ryukyu Trench, Ryukyu, Aleutian Trench, Aleutian, Middle America Trench, Central America and Peru–Chile Trench, Chile subduction zones. In general, the obliquity angle is between 15° and 30°. Subduction zones with high obliquity angles include Sunda Trench, Sunda trench (ca. 60°) and Ryukyu arc (ca. 50°). Obliquity in plate convergence causes differences in Strike and dip, dipping angle and subduction velocity along the plate boundary. Tectonic processes including Slab rollback, slab roll-back, trench retreat (i.e. a tectonic response to the process of slab roll-back that moves the Oceanic trench, trench ...
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Auditorio Juan Pachin Vicens
Auditorio may refer to: * Auditorio light rail station, in Guadalajara, Jalisco * Auditorio metro station, in Mexico City * Auditorio (Mexico City Metrobús) See also * Auditorio Nacional (other) Auditorio Nacional may refer to: *Auditorio Nacional (Mexico), Mexico City **Metro Auditorio, a Metro station *National Auditorium of Music (Auditorio Nacional de Música), Madrid, Spain *National Auditorium of Sodre (Auditorio Nacional de Sodre), U ...

Estadio Paquito Montaner
The Estadio Francisco ("Paquito") Montaner (English: ''Francisco ("Paquito") Montaner Stadium'') is a multi-use stadium in Ponce, Puerto Rico. It is home to the Leones de Ponce team of the Puerto Rico Baseball League (LBPPR) and FC Leones of the Puerto Rico Soccer League (PRSL). The stadium has a capacity of 16,000 seats.''Francisco Montaner Stadium – Tribute to a Sporting Legend.''
Puerto Rico.com: Puerto Rico Channel. Accessed 6 February 2018
''Archived''
by the WayBack Machine on 2018-February-07.
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Puerto Rico National Guard - 49400110361
Puerto, a Spanish word meaning ''seaport'', may refer to: Places *El Puerto de Santa María, Andalusia, Spain *Puerto, a seaport town in Cagayan de Oro, Philippines *Puerto Colombia, Colombia *Puerto Cumarebo, Venezuela *Puerto Galera, Oriental Mindoro, Philippines *Puerto La Cruz, Venezuela *Puerto Píritu, Venezuela *Puerto Princesa, Palawan, Philippines *Puerto Rico, an unincorporated territory of the United States *Puerto Vallarta, Mexico Others *Milton Jesús Puerto (born 1969), Honduran politician * ''Puerto Rico'' (board game) *Operación Puerto doping case See also * * Puerta (other) Puerta refers to the old original gates of the Walled City of Intramuros in Manila. Puerta may also refer to: People * Antonio Puerta, Spanish footballer * Alonso José Puerta, Spanish politician * Lina Puerta, American artist *Mariano Puerta ...

Focal Mechanism
The focal mechanism of an earthquake describes the Fault (geology)#Slip.2C heave.2C throw, deformation in the Hypocenter, source region that generates the seismic waves. In the case of a Fault (geology), fault-related event, it refers to the orientation of the fault plane that slipped, and the slip Euclidean vector, vector and is also known as a fault-plane solution. Focal mechanisms are derived from a solution of the moment tensor for the earthquake, which itself is estimated by an analysis of observed seismic waveforms. The focal mechanism can be derived from observing the pattern of "first motions", whether the first arriving P waves break up or down. This method was used before waveforms were recorded and analysed digitally, and this method is still used for earthquakes too small for easy moment tensor solution. Focal mechanisms are now mainly derived using semi-automatic analysis of the recorded waveforms. Moment tensor solutions The moment tensor solution is displayed gra ...
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Puerto Rico 2019 2020
Puerto, a Spanish word meaning ''seaport'', may refer to: Places *El Puerto de Santa María, Andalusia, Spain *Puerto, a seaport town in Cagayan de Oro, Philippines *Puerto Colombia, Colombia *Puerto Cumarebo, Venezuela *Puerto Galera, Oriental Mindoro, Philippines *Puerto La Cruz, Venezuela *Puerto Píritu, Venezuela *Puerto Princesa, Palawan, Philippines *Puerto Rico, an unincorporated territory of the United States *Puerto Vallarta, Mexico Others *Milton Jesús Puerto (born 1969), Honduran politician * ''Puerto Rico'' (board game) *Operación Puerto doping case See also * * Puerta (other) Puerta refers to the old original gates of the Walled City of Intramuros in Manila. Puerta may also refer to: People * Antonio Puerta, Spanish footballer * Alonso José Puerta, Spanish politician * Lina Puerta, American artist *Mariano Puerta ...

Thrust Fault
A thrust fault is a break in the Earth's crust, across which older rocks are pushed above younger rocks. Thrust geometry and nomenclature Reverse faults A thrust fault is a type of reverse fault that has a dip of 45 degrees or less. If the angle of the fault plane is lower (often less than 15 degrees from the horizontal) and the displacement of the overlying block is large (often in the kilometer range) the fault is called an ''overthrust'' or ''overthrust fault''. Erosion can remove part of the overlying block, creating a ''fenster'' (or ''window'') – when the underlying block is exposed only in a relatively small area. When erosion removes most of the overlying block, leaving island-like remnants resting on the lower block, the remnants are called ''klippen'' (singular '' klippe''). Blind thrust faults If the fault plane terminates before it reaches the Earth's surface, it is called a ''blind thrust'' fault. Because of the lack of surface evidence, blind thrust fa ...
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Puerto Rico Trench
The Puerto Rico Trench is located on the boundary between the North Atlantic Ocean and Caribbean Sea, parallel to and north of Puerto Rico, where the oceanic trench reaches the deepest points in the Atlantic Ocean. The trench is associated with a complex transition from the Lesser Antilles frontal subduction zone between the South American plate and Caribbean plate to the oblique subduction zone and the strike-slip transform fault zone between the North American plate and Caribbean plate, which extends from the Puerto Rico Trench at the Puerto Rico–Virgin Islands microplate through the Cayman Trough at the Gonâve microplate to the Middle America Trench at the Cocos plate. Constituting the deepest points in the Atlantic Ocean, the trench is long and has a maximum documented depth between and . The deepest point is commonly referred to as the Milwaukee Deep, with the Brownson Deep naming the seabed surrounding it. However, more recently, the latter term has also ...
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List Of Tectonic Plates
This is a list of tectonic plates on Earth#Surface, Earth's surface. Plate tectonics, Tectonic plates are pieces of Earth's crust and uppermost mantle (geology), mantle, together referred to as the lithosphere. The plates are around thick and consist of two principal types of material: oceanic crust (also called ''Sima (geology), sima'' from silicon and magnesium) and continental crust (''sial'' from silicon and aluminium). The composition of the two types of crust differs markedly, with mafic basaltic rocks dominating oceanic crust, while continental crust consists principally of lower-density felsic granite, granitic rocks. Current plates Geologists generally agree that the following tectonic plates currently exist on Earth#Surface, Earth's surface with roughly definable boundaries. Tectonic plates are sometimes subdivided into three fairly arbitrary categories: ''major'' (or ''primary'') ''plates'', ''minor'' (or ''secondary'') ''plates'', and ''microplates'' (or ''tertiary ...
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Subduction
Subduction is a geological process in which the oceanic lithosphere and some continental lithosphere is recycled into the Earth's mantle at the convergent boundaries between tectonic plates. Where one tectonic plate converges with a second plate, the heavier plate dives beneath the other and sinks into the mantle. A region where this process occurs is known as a subduction zone, and its surface expression is known as an arc-trench complex. The process of subduction has created most of the Earth's continental crust. Rates of subduction are typically measured in centimeters per year, with rates of convergence as high as 11 cm/year. Subduction is possible because the cold and rigid oceanic lithosphere is slightly denser than the underlying asthenosphere, the hot, ductile layer in the upper mantle. Once initiated, stable subduction is driven mostly by the negative buoyancy of the dense subducting lithosphere. The down-going slab sinks into the mantle largely under its own ...
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Global Positioning System
The Global Positioning System (GPS) is a satellite-based hyperbolic navigation system owned by the United States Space Force and operated by Mission Delta 31. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. It does not require the user to transmit any data, and operates independently of any telephone or Internet reception, though these technologies can enhance the usefulness of the GPS positioning information. It provides critical positioning capabilities to military, civil, and commercial users around the world. Although the United States government created, controls, and maintains the GPS system, it is freely accessible to anyone with a GPS receiver. Overview The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft was launched in 1978 an ...
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