San Francisco

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San Francisco (initials SF (/ˌsæn frənˈsɪsk/Spanish for Saint Francis; Spanish: [san franˈsisko]), officially the City and County of San Francisco, is the cultural, commercial, and financial center of Northern California. The consolidated city-county covers an area of about 47.9 square miles (124 km2) at the north end of the San Francisco Peninsula in the San Francisco Bay Area. It is the fourth-most populous city in California, and the 13th-most populous in the United States, with a 2016 census-estimated population of 870,887. The population is projected to reach 1 million by 2033.

San Francisco was founded on June 29, 1776, when colonists from Spain established Presidio of San Francisco at the Golden Gate and Mission San Francisco de Asís a few miles away, all named for St. Francis of Assisi. The California Gold Rush of 1849 brought rapid growth, making it the largest city on the West Coast at the time. San Francisco became a consolidated city-county in 1856. After three-quarters of the city was destroyed by the 1906 earthquake and fire, San Francisco was quickly rebuilt, hosting the Panama-Pacific International Exposition nine years later. In World War II, San Francisco was a major port of embarkation for service members shipping out to the Pacific Theater. It then became the birthplace of the United Nations in 1945. After the war, the confluence of returning servicemen, massive immigration, liberalizing attitudes, along with the rise of the “hippie” counterculture, the Sexual Revolution, the Peace Movement growing from opposition to United States involvement in the Vietnam War, and other factors led to the Summer of Love and the gay rights movement, cementing San Francisco as a center of liberal activism in the United States. Politically, the city votes strongly along liberal Democratic Party lines.

A popular tourist destination, San Francisco is known for its cool summers, fog, steep rolling hills, eclectic mix of architecture, and landmarks, including the Golden Gate Bridgecable cars, the former Alcatraz Federal PenitentiaryFisherman’s Wharf, and its Chinatown district. San Francisco is also the headquarters of five major banking institutions and various other companies such as Levi Strauss & Co.Gap Inc.FitbitSalesforce.comDropboxRedditSquare, Inc.DolbyAirbnbWeeblyPacific Gas and Electric CompanyYelpPinterestTwitterUberLyftMozillaWikimedia FoundationCraigslist and Weather Underground. It is home to number of educational and cultural institutions, such as the University of California, San Francisco (UCSF), the De Young Museum, the San Francisco Museum of Modern Art, and the California Academy of Sciences.

San Francisco has several nicknames, including “The City by the Bay”, “Golden Gate City”, “Frisco”, “SF”, “San Fran”, “Fog City”, and as well as older ones like “The City that Knows How”, “Baghdad by the Bay”, “The Paris of the West”, or simply “The City”. As of 2017, San Francisco is ranked high on world liveability rankings.

Geography

San Francisco is located on the West Coast of the United States at the north end of the San Francisco Peninsula and includes significant stretches of the Pacific Ocean and San Francisco Bay within its boundaries. Several picturesque islandsAlcatrazTreasure Island and the adjacent Yerba Buena Island, and small portions of Alameda IslandRed Rock Island, and Angel Island—are part of the city. Also included are the uninhabited Farallon Islands, 27 miles (43 km) offshore in the Pacific Ocean. The mainland within the city limits roughly forms a “seven-by-seven-mile square”, a common local colloquialism referring to the city’s shape, though its total area, including water, is nearly 232 square miles (600 km2).

There are more than 50 hills within city limits. Some neighborhoods are named after the hill on which they are situated, including Nob HillPotrero Hill, and Russian Hill. Near the geographic center of the city, southwest of the downtown area, are a series of less densely populated hills. Twin Peaks, a pair of hills forming one of the city’s highest points, forms a popular overlook spot. San Francisco’s tallest hill, Mount Davidson, is 928 feet (283 m) high and is capped with a 103-foot (31 m) tall cross built in 1934. Dominating this area is Sutro Tower, a large red and white radio and television transmission tower.

The nearby San Andreas and Hayward Faults are responsible for much earthquake activity, although neither physically passes through the city itself. The San Andreas Fault caused the earthquakes in 1906 and 1989. Minor earthquakes occur on a regular basis. The threat of major earthquakes plays a large role in the city’s infrastructure development. The city constructed an auxiliary water supply system and has repeatedly upgraded its building codes, requiring retrofits for older buildings and higher engineering standards for new construction. However, there are still thousands of smaller buildings that remain vulnerable to quake damage. USGS has released the California earthquake forecast which models earthquake occurrence in California.

San Francisco’s shoreline has grown beyond its natural limits. Entire neighborhoods such as the MarinaMission Bay, and Hunters Point, as well as large sections of the Embarcadero, sit on areas of landfill. Treasure Island was constructed from material dredged from the bay as well as material resulting from tunneling through Yerba Buena Island during the construction of the Bay Bridge. Such land tends to be unstable during earthquakes. The resulting soil liquefaction causes extensive damage to property built upon it, as was evidenced in the Marina district during the 1989 Loma Prieta earthquakeMost of the city’s natural watercourses, such as Islais Creek and Mission Creek, have been culverted and built over, although the Public Utilities Commission is studying proposals to daylight or restore some creeks.

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