1787 Boricua Earthquake
The 1787 Boricua earthquake struck offshore of the island of Puerto Rico on May 2. The magnitude of the earthquake was believed to have been around 8.0–8.5, however there is evidence that it was only about 6.9. The epicenter is thought to have been somewhere north of Puerto Rico, probably on the Puerto Rico Trench.Earthquake History of Puerto Rico and the Virgin Islands
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Puerto Rican José Molinelli considers it "the strongest" in the seismic history of the cou ...
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Puerto Rico
Puerto Rico (; abbreviated PR; tnq, Boriken, ''Borinquen''), officially the Commonwealth of Puerto Rico ( es, link=yes, Estado Libre Asociado de Puerto Rico, lit=Free Associated State of Puerto Rico), is a Caribbean island and Unincorporated territories of the United States, unincorporated territory of the United States. It is located in the northeast Caribbean Sea, approximately southeast of Miami, Florida, between the Dominican Republic and the United States Virgin Islands, U.S. Virgin Islands, and includes the eponymous main island and several smaller islands, such as Isla de Mona, Mona, Culebra, Puerto Rico, Culebra, and Vieques, Puerto Rico, Vieques. It has roughly 3.2 million residents, and its Capital city, capital and Municipalities of Puerto Rico, most populous city is San Juan, Puerto Rico, San Juan. Spanish language, Spanish and English language, English are the official languages of the executive branch of government, though Spanish predominates. Puerto Rico ...
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Ponce Cathedral
Ponce may refer to: *Ponce (surname) * *Ponce, Puerto Rico, a city in Puerto Rico ** Ponce High School ** Ponce massacre, 1937 * USS ''Ponce'', several ships of the US Navy *Manuel Ponce, a Mexican composer active in the 20th century * British slang for a procurer of prostitutes, also used figuratively to refer to an effeminate man. See also *Ponce Inlet, Florida, a town in Florida, US *Ponce de León (other) *Ponce de Leon, Florida, a town in Florida, US *Ponce de Leon, Missouri, an unincorporated community in Missouri, US *Ponce de Leon Avenue, Atlanta, Georgia, US *Ponce de Leon Bay, a bay in Florida, US *Ponce de Leon Springs State Recreation Area Ponce de Leon Springs State Recreation Area is a Florida State Park in Holmes County, Florida, USA. It is located in the town of Ponce de Leon. The park, which was created to provide public outdoor recreation and other park-related uses, was i ...

Earthquakes In Puerto Rico
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 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 a tsunami. Earthquakes c ...
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18th Century In Puerto Rico
18 (eighteen) is the natural number following 17 and preceding 19. In mathematics * Eighteen is a composite number, its divisors being 1, 2, 3, 6 and 9. Three of these divisors (3, 6 and 9) add up to 18, hence 18 is a semiperfect number. Eighteen is the first inverted square-prime of the form ''p''·''q''2. * In base ten, it is a Harshad number. * It is an abundant number, as the sum of its proper divisors is greater than itself (1+2+3+6+9 = 21). It is known to be a solitary number, despite not being coprime to this sum. * It is the number of one-sided pentominoes. * It is the only number where the sum of its written digits in base 10 (1+8 = 9) is equal to half of itself (18/2 = 9). * It is a Fine number. In science Chemistry * Eighteen is the atomic number of argon. * Group 18 of the periodic table is called the noble gases. * The 18-electron rule is a rule of thumb in transition metal chemistry for characterising and predicting the stability of metal complexes. ...
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1787 Earthquakes
Events January–March * January 9 – The North Carolina General Assembly authorizes nine commissioners to purchase of land for the seat of Chatham County. The town is named Pittsborough (later shortened to Pittsboro), for William Pitt the Younger. * January 11 – William Herschel discovers Titania and Oberon, two moons of Uranus. * January 19 – Mozart's '' Symphony No. 38'' is premièred in Prague. * February 2 – Arthur St. Clair of Pennsylvania is chosen as the new President of the Congress of the Confederation.''Harper's Encyclopaedia of United States History from 458 A. D. to 1909'', ed. by Benson John Lossing and, Woodrow Wilson (Harper & Brothers, 1910) p167 * February 4 – Shays' Rebellion in Massachusetts fails. * February 21 – The Confederation Congress sends word to the 13 states that a convention will be held in Philadelphia on May 14 to revise the Articles of Confederation. * February 28 – A charter is gra ...
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1787 In The Caribbean
Events January–March * January 9 – The North Carolina General Assembly authorizes nine commissioners to purchase of land for the seat of Chatham County. The town is named Pittsborough (later shortened to Pittsboro), for William Pitt the Younger. * January 11 – William Herschel discovers Titania and Oberon, two moons of Uranus. * January 19 – Mozart's '' Symphony No. 38'' is premièred in Prague. * February 2 – Arthur St. Clair of Pennsylvania is chosen as the new President of the Congress of the Confederation.''Harper's Encyclopaedia of United States History from 458 A. D. to 1909'', ed. by Benson John Lossing and, Woodrow Wilson (Harper & Brothers, 1910) p167 * February 4 – Shays' Rebellion in Massachusetts fails. * February 21 – The Confederation Congress sends word to the 13 states that a convention will be held in Philadelphia on May 14 to revise the Articles of Confederation. * February 28 – A charter is gra ...
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List Of Earthquakes In The Caribbean
Major earthquakes in the Caribbean are infrequent and are sometimes accompanied by tsunami. Earthquakes See also *List of earthquakes in Cuba *List of earthquakes in the Dominican Republic *List of earthquakes in Haiti *List of earthquakes in Puerto Rico References Sources * Further reading * * * *Megan Torpey Zimmerman; Bingming Shen‐Tu; Khosrow Shabestari; Mehrdad Mahdyiar Bulletin of the Seismological Society of America (2022) 112 (2): 1120–1148. https://doi.org/10.1785/0120210157 External links * {{Caribbean topics, state=collapsed Caribbean Earthquakes 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 ...

List Of Earthquakes In Puerto Rico
Puerto Rico and the Virgin Islands lie at the boundary between the Caribbean and North American plates, making these territories prone to earthquakes. This is a highly active seismic region both surrounded and traversed by numerous fault lines; to the north, the North American plate subducts into the Caribbean plate, while a number of transform fault lines cross the main island of Puerto Rico diagonally from southeast to northeast. Puerto Rico and the Virgin Islands are also located on a microplate that is continuously being trampled by the subduction zone to the north. Puerto Rico is constantly prone to experiencing major earthquakes, superior to 7.0, at any moment. History The region has been seismically active since ancient times. The Great Northern and Great Southern fault zones that cross the main island of Puerto Rico laterally have been active since the Eocene epoch. Earthquakes in the region have been recorded since the early 17th century and some of the first seismi ...
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List Of Earthquakes In 1918
This is a list of earthquakes in 1918. Only magnitude 6.0 or greater earthquakes appear on the list. Lower magnitude events are included if they have caused death, injury or damage. Events which occurred in remote areas will be excluded from the list as they wouldn't have generated significant media interest. All dates are listed according to UTC time. A couple of major events capped a fairly active year. The two major events came within weeks of each other. The largest was a magnitude 8.3 in the Philippines in August. In early September a magnitude 8.1 struck Russia. The deadliest event occurred in February in China when a magnitude 7.3 caused 2,000 deaths. Overall By death toll * Note: At least 10 casualties By magnitude * Note: At least 7.0 magnitude Notable events January February April May June July August September October November December References {{Earthquakes in 1918 1918 1918 This year is n ...
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1918 San Fermín Earthquake
The 1918 San Fermín earthquake, also known as the Puerto Rico earthquake of 1918, struck the island of Puerto Rico at on October 11. The earthquake measured 7.1 on the moment magnitude scale and IX (''Violent'') on the Mercalli intensity scale. The mainshock epicenter occurred off the northwestern coast of the island, somewhere along the Puerto Rico Trench. The earthquake triggered a tsunami with waves measured that swept the west coast of the island. The combined effects of the earthquake and tsunami made it one of the worst natural disasters that have struck the island. The losses resulting from the disaster were approximately 76–118 casualties and $4–29 million in property damage. Earthquake The epicenter of the 1918 San Fermín earthquake was located in the Mona Passage off the northwestern coast of the island. The strongest ground shaking has been estimated at intensity IX on the Mercalli intensity scale. The resulting tsunami affected primarily the west coast towns ...
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1867 Virgin Islands Earthquake And Tsunami
The 1867 Virgin Islands earthquake and tsunami occurred on November 18, at 2.45 p.m. in the Anegada Trough about 20 km southwest of Saint Thomas, Danish West Indies (now U.S. Virgin Islands). The 7.5 earthquake came just 20 days after the devastating San Narciso Hurricane in the same region. Tsunamis from this earthquake were some of the highest ever recorded in the Lesser Antilles. Wave heights exceeded in some islands in the Lesser Antilles. The earthquake and tsunami resulted in no more than 50 fatalities, although casualties in the hundreds is also claimed. Tectonic setting The U.S.Virgin Islands are part of the Greater Antilles that lies parallel to the Puerto Rico Trench; an oblique subduction zone where the North American Plate is underthrusted beneath the Caribbean Plate along the Lesser Antilles subduction zone transits to strike-slip along the Septentrional-Oriente fault zone. Because of this transition, the overriding Caribbean Plate begins to extend, and n ...
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Ocean Floor
The seabed (also known as the seafloor, sea floor, ocean floor, and ocean bottom) is the bottom of the ocean. All floors of the ocean are known as 'seabeds'. The structure of the seabed of the global ocean is governed by plate tectonics. Most of the ocean is very deep, where the seabed is known as the abyssal plain. Seafloor spreading creates mid-ocean ridges along the center line of major ocean basins, where the seabed is slightly shallower than the surrounding abyssal plain. From the abyssal plain, the seabed slopes upward toward the continents and becomes, in order from deep to shallow, the continental rise, slope, and shelf. The depth within the seabed itself, such as the depth down through a sediment core, is known as the “depth below seafloor.” The ecological environment of the seabed and the deepest waters are collectively known, as a habitat for creatures, as the “benthos.” Most of the seabed throughout the world's oceans is covered in layers of marine sediments. ...
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