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San Francisco Bay Area

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Image:BayareaUSGS.jpg
USGS satellite photo of the San Francisco Bay Area. (Click the image for a description of major features.)
Image:Bayarea.jpg
San Francisco Bay Area highlighted in red on a map of California

The San Francisco Bay Area, colloquially known as the Bay Area or The Bay, is a geographically and ethnically diverse metropolitan region that surrounds the San Francisco Bay in Northern California. It encompasses the cities of San Francisco, Oakland, and San Jose. It also includes the smaller urban and rural areas of the North Bay. Overall, the Bay Area consists of nine counties, 101 cities, and comprises 7,000 square miles.<ref>[1]</ref>. The nine counties are Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma.<ref>[2]</ref>. As of July 2006, the Bay Area is home to 7.2 million people, making it the fifth most populous metropolitan area in the United States, with the majority of the growth due to international immigration.<ref>"After several years of decline, population starts to grow again" [[San Francisco Chronicle article]</ref><ref>Bay Area 2005 Population Census</ref> The Bay Area comprises many cities, towns, military bases, airports, and associated regional, state, and national parks sprawled over nine counties (sometimes defined as ten or eleven counties) and connected by a massive network of roads, highways, railroads, bridges, tunnels and commuter rail.

While San Jose is now the largest city in the Bay Area (having surpassed San Francisco in the 1990 census), for most of its history San Francisco was the most populous city. San Francisco remains the focal point and major cultural center in the region. The Bay Area has the highest median household and per capita income of any metropolitan area in the United States<ref name="US Census Bureau, household and per capita income during the 2000 Census in metro areas"> US Census Bureau, household and per capita income during the 2000 Census in metro areas


. Retrieved on 2007-06-01. </ref> and is also one of the most politically liberal areas in the nation.<ref name="SF Chronicle, most democratic voting bloc in the state, 2003"> SF Chronicle, most democratic voting bloc in the state, 2003


. Retrieved on 2007-06-12. </ref> The cost of living is also one of the highest in the nation (San Francisco Chamber of Commerce, 2007).

Sommaire

Subregions

San Francisco

Image:Golden Gate Panorama.jpg
The Golden Gate Bridge is a suspension bridge spanning the Golden Gate strait, the opening into the San Francisco Bay from the Pacific Ocean. It connects San Francisco with Marin County


The City and County of San Francisco is generally placed in a category by itself in terms of geography and culture even within the Bay Area, and is known locally as "The City". It is separated by water from the north, west and east, and by a county line from its neighbor cities to the South. San Francisco has long served as the cultural, financial and urban center of the region. For most of the Bay Area's history, it has also served as the key population center. However, the limitations of the size of the county (47 square miles, making it the second most densely populated major city in the United States after New York City) constrained the growth of the city and, since the 1906 San Francisco earthquake, other cities and counties have received the larger share of population growth.

North Bay

Image:Lightmatter napa valley.jpg
Napa Valley is most famous for its wine.

The region north of the Golden Gate Bridge is known locally as the North Bay. This area consists of Marin County and extends northward into Sonoma County and Napa County and eastward into Solano County. The city of Vallejo, being part of Solano County, is often considered the eastern most city of the North Bay, though due to a stronger cultural/socioeconomic similarity to many East Bay cities, it is also often considered the northern most city of the East Bay. With few exceptions, this region is quite affluent: Marin County is ranked as the wealthiest in the nation. The North Bay is generally the least urbanized part of the Bay Area, with many areas of undeveloped open space, farmland and vineyards. Santa Rosa in Sonoma County is the North Bay's largest city, with a population of 156,200 and a Metropolitan Statistical Area population of 466,477, making it the fifth largest city in the San Francisco Bay Area. The North Bay is the only section of the Bay Area that is not served by a commuter rail transit service, and Sonoma-Marin service was recently voted down. The lack of transportation services is mainly because of the lack of population mass in the North Bay, and the fact that it is separated completely from the rest of the Bay Area by water, the only access points being the Golden Gate Bridge leading to San Francisco, the Richmond-San Rafael and Carquinez Bridges leading to Richmond, and the Benicia-Martinez Bridge leading to Martinez.

The Peninsula

The area between the City and County of San Francisco and the South Bay is the San Francisco Peninsula, known locally as The Peninsula. This area consists of a series of small cities and suburban communities in San Mateo County and the northwestern part of Santa Clara County, as well as various towns along the Pacific coast, such as Pacifica and Half Moon Bay. This area is extremely diverse, although it contains significant populations of affluent family households with the exception of East Palo Alto and some parts of Redwood City. Many of the cities and towns had originally been centers of rural life until the post-World War II era when large numbers of middle and upper class Bay area residents moved in and developed the small villages. Since the 1980s the area has seen a large growth rate of middle and upper class families who have settled in cities like Palo Alto and Atherton as part of the technology boom of Silicon Valley.The Peninsula is also home to what used to be one of the deadliest cities in the United States, East Palo Alto. Many of these families are of foreign background and have significantly contributed to the diversity of the area.

East Bay

Image:Berkeley-San Francisco-Oakland-Richmond--Panorama.jpg
Looking west from the Berkeley Hills. Visible clockwise around the bay from the distant Golden Gate (upper center) are Marin County (Upper Right). Albany (Lower Right), Berkeley (Center and foreground), Emeryville (Lower Left), Oakland (Far Lower Left), South San Francisco (Far Upper Left) and San Francisco (Upper Left)

The eastern side of the bay, consisting of Alameda and Contra Costa counties, is known locally as the East Bay. The East Bay is split into two regions, the inner East Bay, which sits on the Bay shoreline, and the outer East Bay, consisting of inland valleys separated from the inner East Bay by hills and mountains.

  • The inner East Bay includes the cities of Oakland, Hayward, Fremont, Berkeley, and Richmond, as well as many smaller suburbs such as Alameda, Castro Valley, Newark, Union City, Emeryville, Albany, San Leandro, San Pablo, El Sobrante,Pinole, Piedmont, and El Cerrito. The inner East Bay is more urban, more densely populated, has a much older building stock (built before World War II) and a more ethnically diverse population. Oakland hosts the region's largest seaport and professional sports franchises in basketball, football, and baseball. As with many inner urban areas, the Inner East Bay also features a high accumulation of crime as well as other socio-economic problems. According to the FBI Uniformed Crime Reports, more than 50% of all homicides in the Bay Area in 2002 occurred within the city limits of Oakland and Richmond. The homicide rates have steadily increased, as 2005 had the highest homicide rates for both Richmond and Oakland.
  • The outer East Bay consists the eastern portions of Alameda and Contra Costa counties and includes the cities of Orinda, Walnut Creek, Concord, Martinez, Pittsburg, Antioch, and Pleasant Hill, and Lafayette to the north (also referred as Central Contra Costa County) and the cities of Dublin, Pleasanton, Livermore, Danville, San Ramon to the south (sometimes referred to as the Livermore-Amador Valley or the Tri-Valley), as well as other smaller towns, such as Alamo and Brentwood. They are connected to the inner East Bay by BART, interstates 80 and 580, and highway 24 via the Caldecott Tunnel. The outer East Bay is part suburban, part rural and its infrastructure was mostly built up after World War II. The upper middle-class white population remains the majority in this area, but the Hispanic/Latino portion of the population has grown significantly to comprise upwards of 1/4 to 1/3 of the population in a number of communities.

South Bay

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Looking west over northern San Jose (downtown is at far left) and other parts of Silicon Valley

The communities along the southern edge of the Bay are known as the South Bay, Santa Clara Valley, and Silicon Valley. Some Peninsula and East Bay towns are sometimes included in the latter. It includes the major city of San Jose, and its outlying neighbors, including the cities Morgan Hill, Gilroy, and the high-tech hubs of Santa Clara, Milpitas, Cupertino, Sunnyvale, Palo Alto and Mountain View as well as many other suburbs like Los Altos, Saratoga, Campbell and Los Gatos. Generally, the South Bay is Santa Clara County, but the northwest portion of the county (Palo Alto and Mountain View) is often considered part of the Peninsula instead. Home of Silicon Valley, the South Bay was also an early development of working and middle class families who left the coastal cities of the Eastern Bay south of Oakland and Alameda. Large numbers of families during the post-World War era also moved there for the aerospace industry. This area has long been developed and expanded and is often featured as a stereotype of the typical California suburban city. Today, the growth continues, primarily fueled by technology and cheap immigrant workers. The result has been a huge increase in the value of property forcing many middle class families out of the area or into nascent ghettos in older sections of the region.

Befitting of the title Silicon Valley, this region is home to a vast number of technology sector giants. Some notable tech companies headquartered in the South Bay are Intel, AMD, Cisco Systems, Hewlett-Packard, Apple, Google, eBay,and Yahoo!. As a consequence of the rapid growth of these and other companies, the South Bay has gained increasing political and economic influence both within California and throughout the world.

Santa Cruz and San Benito

The regional governments in the San Francisco Bay Area, including the Association of Bay Area Governments, the Metropolitan Transportation Commission, the Bay Area Air Quality Management District, and the San Francisco Bay Regional Water Quality Control Board include only the nine counties above in their boundaries or membership. (The BAAQMD includes all of the nine counties except the northern portions of Sonoma and Solano; the RWQCB includes all of San Francisco and the portions of the other eight counties that drain to San Francisco Bay or to the Pacific Ocean.)<ref>Regional Water Quality Control Board, San Francisco Bay Region (2) Boundaries Accessed 2007-02-20</ref> However, the United States Census Bureau defines the San Jose-San Francisco-Oakland Consolidated Statistical Area as an eleven-county region, including the nine counties above plus Santa Cruz and San Benito Counties. Meanwhile, the California State Parks Department defines the Bay Area as including ten counties<ref name=parks> Find a park - San Francisco Bay Area Region

. California State Parks  
 

 

. Retrieved on 2006-06-20. </ref>, including Santa Cruz but excluding San Benito. On The Other hand, Santa Cruz and San Benito along with Monterey County are part of a different regional government organization called the Association of Monterey Bay Area Governments.

Some residents of the Santa Cruz Mountains (Boulder Creek, Brookdale, Ben Lomond, Felton, Scotts Valley) do not usually consider themselves to be residents of the Bay Area, rather just of the Santa Cruz Mountains themselves. The Santa Cruz Mountains run along the spine of the San Francisco Peninsula, beginning in San Francisco and continuing down to their terminus near the City of Gilroy, effectively creating the Santa Clara Valley.

The city of Santa Cruz is geographically isolated from the rest of the San Francisco Bay Area, and is usually considered a part of the Monterey Bay area since the city lies on the north end of the Monterey Bay. The city is also sometimes regarded as the northernmost point of the California Central Coast, which extends along the state's coastline to Santa Barbara.

Demographics

Modèle:USCensusPop

As of the 2006 census, there were 6,927,555 people residing in the Bay Area. The racial makeup of the 9 County Bay Area was 47.29% White, 19.83% Asian, 0.67% Pacific Islander, 7.32% African American, 0.87% Native American, 9.46% from other races, and 5.28% from two or more races. 19.89% of the population were Hispanic of any race. 29.6% of the population was foreign born.

As of the 2006 census, there were 7,236,391 people residing in the Greater Bay Area. The racial makeup of the 9 County Bay Area plus Santa Cruz and San Benito Counties was 50.41 White, 19.96% Asian, 0.72% Pacific Islander, 7.35% African American, 0.90% Native American, 10.17% from other races, 5.46% from two or more races. 21.19% of the population were Hispanic of any race. 31.8% of the population was foreign born.

Affluence

The San Francisco Bay Area is one of the wealthiest regions in the United States. According to the United States Census Bureau, of the 280 defined metropolitan areas, the San Francisco Bay Area has the highest median household income in the nation with $62,024 in the year 2000. The Census Bureau also released data in August 2006 citing San José as having the second highest median household income among large cities. Among medium-sized cities, Pleasanton has the highest household income in the country, and Livermore the third highest. Nevertheless, disposable income is very comparable with the rest of the country, mostly because increased cost of living offsets increased income.<ref name=affluence> Pleasanton tops county in median household income

. Inside Bay Area  
 

 

. Retrieved on 2006-10-15. </ref>

While only 26% of households nationwide boast incomes of over $75,000 a year, 48% of households in the San Francisco Bay Area enjoy such incomes.<ref name="Stanford University, study of US Department of Commerce statistics concerning income in California"> Stanford University, study of US Department of Commerce statistics concerning income in California


. Retrieved on 2006-11-06. </ref> The percentage of households with incomes exceeding the $100,000 mark in the Bay Area was double the nationwide percentage. Roughly one third (31%) of households in the San Francisco Bay Area had a six figure income, versus less than 16% at the nationwide level.<ref name="US Census 2005 Economic Survey, income data"> US Census 2005 Economic Survey, income data


. Retrieved on 2006-06-29. </ref> In June 2003, a study by Stanford University reviewing US Census Bureau statistics determined the median household income in the San Francisco Bay Area to be roughly 60% above national average.<ref name="Stanford University, study of US Department of Commerce statistics concerning income in California"> Stanford University, study of US Department of Commerce statistics concerning income in California


. Retrieved on 2006-11-06. </ref> Overall the largest income bracket in the Bay Area were households making between $100,000 and $150,000 annually, who constituted roughly 18% of households.<ref name="Stanford University, study of US Department of Commerce statistics concerning income in California"> Stanford University, study of US Department of Commerce statistics concerning income in California


. Retrieved on 2006-11-06. </ref> On a national level the largest income bracket were households with incomes between $30,000 and $40,000 who constituted 13% of all households nationwide.<ref name="US Census 2005 Economic Survey, income data"> US Census 2005 Economic Survey, income data


. Retrieved on 2006-06-29. </ref>

Six of the top ten California places with the highest per capita income are in the San Francisco Bay Area (Belvedere, Atherton, Woodside, Portola Valley, Diablo). Of the 100 highest income counties by per capita income in the United States, six are in the San Francisco Bay Area (Marin, San Mateo, San Francisco, Santa Clara, Contra Costa, Alameda). According to Forbes Magazine, published in 2005, 12 of the top 50 most expensive Zip Codes are in the Bay Area (Atherton, Ross, Diablo, Belvedere-Tiburon, Nicasio, Portola Valley, Los Altos-Los Altos Hills, Los Gatos-Monte Sereno, the Cow Hollow-Marina District of San Francisco, Alamo, and Burlingame-Hillsborough). [3]

Image:SF vs US Income.jpg
This graph compares the income distribution among Bay Area households to the national level.<ref name="Stanford University, study of US Department of Commerce statistics concerning income in California"> 13.pdf Stanford University, study of US Department of Commerce statistics concerning income in California . Retrieved on 2006-11-06. </ref><ref name="US Census 2005 Economic Survey, income data"> 000.htm US Census 2005 Economic Survey, income data . Retrieved on 2006-06-29. </ref>

Forty-two San Francisco Bay Area residents made the Forbes magazine's 400 richest Americans list, published in 2006<ref>http://www.nbc11.com/news/9910976/detail.html</ref>. Thirteen live within San Francisco proper, placing it seventh among cities in the world. Among the forty-two were several well-known names such as Steve Jobs, George Lucas, and Charles Schwab. The highest-ranking resident is Larry Ellison of Oracle at No. 4. He is worth $19.5 billion.

A study by Claritas indicates that in 2004, 5% of all households within the San Francisco and San José metropolitan areas held $1 million in investable assets [4], and Wells Fargo estimates that there are 180,000 millionaire households in the Bay Area, 10% of which have $5 million or more in assets [5].

Living expenses

The popularity of the region, owing both to its mild weather and its cultural and economic diversity, combined with strong anti-growth sentiment (both local and statewide), has led to high housing costs, especially for ownership and for commercial property leases. Owing to the relatively lower costs of outlying housing and limited public transportation, long, expensive, and often unpleasant automobile commutes are common in the region, and these costs tend to trickle down throughout various activities, making many other activities such as dining out, theater tickets, etc. more expensive than in other areas of the country. For only a limited portion of the population have wages kept pace with the increased expenses and many minimum wage earners, even those holding multiple jobs, (and many families with multiple members employed) are classified as "working poor", while the higher incomes necessary for a satisfactory lifestyle in the region lead to higher taxes, especially at the federal level for persons not qualifying for high mortgage or self employment related deductions. Although most working-class households in the United States earn between $20,000–$30,000 a year, working-class households in the Bay Area earn over $50,000 a year performing the same jobs (such as in the service industry), which would be considered middle-class in other parts of the country. Nevertheless, because of extremely expensive housing costs, disposable income of working-class Bay Area households is only equivalent to the amount of disposable income in other parts of the country because the rest of the income increase goes to pay for an increased cost of living. Therefore, although the great majority of the population is much more affluent (without taking into account the increased costs of living) compared to the rest of the country, the disposable income is nearly identical. This enables such stores such as variety stores to maintain a presence in the Bay Area.

Political views

The Bay Area is relatively renowned as being among the most liberal areas in the country. According to the Cook Partisan Voting Index (CPVI), congressional districts the Bay Area tend to favor Democratic candidates by roughly 23 percentage points, considerably above the mean for Coastal California or California overall. All congressional districts in the region voted for Kerry in the 2004 election with only 25% of votes being cast in support of George W. Bush. CPVI ratings ranged from D +14 in San Jose to D +21 in Marin County and D +38 in Barbara Lee's district encompassing Berkley and Oakland. Nancy Pelosi's district, California's 8th which includes most of the city of San Francisco, had a CPVI rating of D +36 with Bush having received only 14% of votes in the city.

District Location Cook Partisan Index % for Bush, 2004 Median Household Income<ref name="US Census Bureau, 2000 Census income data by congressional district"> US Census Bureau, 2000 Census income data by congressional district


. Retrieved on 2007-05-31. </ref>

Per Capita Income<ref name="US Census Bureau, 2000 Census income data by congressional district"> US Census Bureau, 2000 Census income data by congressional district


. Retrieved on 2007-05-31. </ref>

6th districtMarin and Sonoma CountyD +2128%$59,115$33,036
7th districtRichmond, Vallejo, Vacaville, and PittsburgD +1932%
8th districtCity and County of San FranciscoD +3614%$44,314$25,201
9th districtOakland, Berkeley and the Oakland hillsD +3813%$52,322$34,552
10th districtFairfield, Livermore, Pleasant Hill, and ConcordD +940%
12th districtSan Francisco Peninsula including most of San Mateo CountyD +2227%$70,307$34,448
13th districtSilicon Valley and East Bay, including Fremont, Union city and HaywardD +2228%$62,415$26,076
14th district Silicon Valley, including Redwood City, Mountain View, Sunnyvale, Palo Alto and Santa CruzD +1830%$77,985$43,063
15th districtCity of San Jose (western areas)D +1436%$74,947$32,617
16th districtSan Jose, Morgan HillD +1636%$67,689$25,064
MedianDistricts: 6th, 7th, 8th, 9th, 10th, 12th, 13th, 14th, 15th, 16thD +21.528%$65,052$32,826

Weather

Because the hills, mountains, and large bodies of water produce such vast geographic diversity within this region, the Bay Area offers a significant variety of microclimates. The areas near the Pacific Ocean are generally characterized by relatively small temperature variations during the year, with cool foggy summers and mild rainy winters. Inland areas, especially those separated from the ocean by hills or mountains, have hotter summers and colder overnight temperatures during the winter. Few residential areas ever experience snow, but peaks over 2000 feet are often dusted with snow several times each winter (including Mount St. Helena, Mount Hamilton, Mount Diablo, and Mount Tamalpais). The coast north of San Francisco, where year-round cool, moist conditions enable redwoods to grow, has almost nothing in common with Livermore, just 40 miles inland across the bay, which has desert-like precipitation and heat. San José at the south end of the Bay averages fewer than 15 inches of rain annually, while Napa at the north end of the Bay averages over 30 and parts of the Santa Cruz Mountains just a few miles west of San José get over 55. In the summer, inland regions can be over 40 degrees Fahrenheit (22 degrees Celsius) warmer than the coast. This large temperature contrast induces a strong pressure gradient, which results in brisk coastal winds which help keep the coastal climate cool and typically, foggy during the summer. Additionally, strong winds are produced through gaps in the coastal ranges such as the Golden Gate, the Carquinez Strait, and the Altamont Pass, the latter the site of extensive wind farms. During the fall and winter seasons, when not stormy, a high pressure area is usually present inland, leading to an offshore flow. While negatively impacting air quality this also clears fog away from the Pacific shore, and so the best weather in San Francisco can usually be found from mid September through mid November. Winter storms are typically short, wet, and mild in temperature, being caused by cold fronts sweeping the western Pacific and originating from low pressure systems in the Gulf of Alaska. Occasionally in the late Spring and early Summer a tropical storm near Baja California will bring rare humid weather from the tropics to the Bay Area, and also rare summer thunderstorms.

Image:San Francisco Bay Area Skyline Blvd.jpg
Skyline Boulevard stretches through the Santa Cruz Mountains, here near Palo Alto, California. During winter and spring, the hills surrounding the Bay Area are lush and green.
Image:San Francisco Bay Area Skyline Blvd2.jpg
Rain is rare in the Bay Area during the summer months. As a result, the surrounding hills quickly become dry and golden-hued in grassy areas.

Geology and landforms

Modèle:Seealso

Multiple terranes

The area is well known worldwide for the complexity of its landforms, the region being composed of at least six terranes (continental, seabed, or island arc fragments with distinct characteristics) pushed together over millions of years by the forces of plate tectonics. As a consequence, many types of rock and soil are found in the region. Formations include the sedimentary rocks of sandstone, limestone, and shale in uplifted seabeds, metamorphic serpentine rock, coal deposits, and igneous forms as the basalt flows and ash deposits of extinct volcanos. Pleistocene-era fossils of mammals are abundantly present in some locations.

Vertical relief

The region has considerable vertical relief in its landscapes that are not in the alluvial plains leading to the bay or in inland valleys. In combination with the extensive water regions this has forced the fragmented development of urban and suburban regions and has led to extensive building on poor soils in the limited flatland areas and considerable expense in connecting the various subregions with roads, tunnels, and bridges.

Several mountains are associated with some of the many ridge and hill structures created by compressive forces between the Pacific Plate and the North American plate. These provide spectacular views (in appropriate weather) of large portions of the Bay Area and include Marin County's Mount Tamalpais at 2,571 feet (784 metres). Contra Costa County's Mount Diablo at 3,849 feet (1,173 metres), Alameda County's Mission Peak at 2,517 feet (767 m), and Santa Clara County's Mount Hamilton at 4,213 ft (1,284 m), the latter with significant astronomical studies performed at its crowning Lick Observatory.

The three major ridge structures (part of the Pacific Coast Range) which are all roughly parallel to the major faultlines:

Major waterways

Earthquake faults

Image:Flat eq map anotated.png
Map showing the major faults in the Bay Area. Numerous minor faults are also capable of generating locally destructive earthquakes.

The region is also traversed by at least five major slip-strike fault systems with hundreds of related faults many of which are "sister faults" of the infamous San Andreas Fault, all of which are stressed by the relative motion between the Pacific Plate and the North American Plate or by compressive stresses between these plates. Significant blind thrust faults (faults with near vertical motion and no surface ruptures) are associated with portions of the Santa Cruz Mountains and the northern reaches of the Diablo Range and Mount Diablo.

Natural hazards

Earthquakes

Image:ShakeSuseptBayamateMod.gif
Map showing earthquake amplification due to soil type.

The region is particularly exposed to hazards associated with large earthquakes,<ref>http://quake.abag.ca.gov/ - Maps and information about Bay Area threats including earthquakes, landslides, and tsunamis.</ref> owing to a combination of factors:

  • Numerous major active faults in the region.
  • A combined thirty year probability of a major earthquake in excess of seventy percent.
  • Poorly responding native soil conditions in many places near the bay and in inland valleys, soils which amplify shaking as shown in the map to the right.
  • Large areas of filled marshlands and bay muds that are significantly urbanized, with most subject to liquefaction, becoming unable to support structures.
  • A large inventory of older buildings, many of which are expected to perform poorly in a major earthquake.
  • Extensive building in areas subject to landslide, mudslide, and in some locations directly over active fault surface rubble zones.
  • Most lowrise construction is not fireproof and water systems are likely to be extensively damaged and so large areas are subject to destruction by fire after a large earthquake.
  • The coastal location makes the region vulnerable to Pacific Ocean tsunamis.<ref>Describes Bay Area damage from 1960 tsunami.</ref>

Some of these hazards are being addressed by seismic retrofitting, education in household seismic safety, and even complete replacement of major structures such as the eastern span of the San Francisco-Oakland Bay Bridge.

For an article concerning a typical fault in the region and its associated hazards see Hayward Fault Zone.

Flooding

Some flooding occurs on local drainages under sustained wet conditions when the ground becomes saturated, more frequently in the North Bay area, which tends to receive substantially more rainfall than the South Bay. In one case, the Napa River drainage, floodplain developments are being purchased and removed and natural wetlands restored in the innovative Napa River Flood Project as the previous channelization of insufficient capacity around such developments was causing flooding problems upstream. Many of the local creeks have been channelized, although modern practice and some restoration work includes returning the creeks to a natural state with dry stormwater bypasses constructed to handle flooding. While quite expensive, the restoration of a natural environment is of high priority in the intensively urbanized areas of the region.

Windstorms

A very strong Pacific storm can bring both substantial rainfall and strong wind gusts that can cause trees to fall on power lines. Owing to the wide area involved (sometimes hundreds of miles of coast), service can be interrupted for up to several days in some more remote localities, but service is usually restored quickly in urban areas.

In the spring and fall, strong offshore winds periodically develop. These winds are an especially dangerous fire hazard in the fall when vegetation is at its driest.

Firestorms

Firestorms are rare with large urban fires occurring a few times a century, but owing to wildland/urban interface areas can be a potential problem during some times of the year, particularly with a dry easterly wind in late Summer and early Autumn. This has proved to be a recurring problem in the hills above Berkeley and Oakland.

Mudslides and Landslides

Some areas which are geologically unstable have been extensively urbanized, and can become unstable due to changes in drainage patterns and grading created for development. These are usually confined to small areas, but there have been larger problems in the Santa Cruz Mountains. A small number of houses on cliff edge lots in Daly City are becoming endangered by the slow ocean erosion and periodic sliding of steep sandy bluffs.

Transportation

The Bay Area is served by many public transportation systems, including three international airports (SFO, OAK, SJC), six major overlapping bus transit agencies (AC Transit, Muni, SamTrans, VTA, Golden Gate Transit, County Connection) in addition to dozens of smaller ones, four rapid transit and regional rail systems including BART and CalTrain, two light rail systems (San Francisco Muni Metro and VTA Light-rail). There are also several regional rail lines provided by Amtrak, notable the Capitol Corridor in addition to those there are multiple public and private ferry services (notably Golden Gate Ferry), which are being expanded by the San Francisco Bay Water Transit Authority, the regional ferry hub is Ferry Building. AC Transit and some other agencies provide an extensive network of express "transbay" commuter buses from the suburbs to San Francisco Transbay Terminal.

The freeway and highway system is very extensive; however, many freeways are heavily congested during rush hour, especially the trans-bay bridges.

Higher education

The region is home to many universities and seminaries, most notably Stanford University, the University of California, Berkeley, and the University of California, San Francisco. In 2003, there were approximately 545,000 students enrolled in college or graduate school, while approximately 41 percent of residents aged 25 years and over had a bachelors degree or higher.<ref>U.S. Census Bureau, 2003 American Community Survey, accessed November 5, 2007</ref> The San Francisco Bay Area population is near the top in the Nation for overall education level. The San Francisco and San Jose PMSAs rank third and fourth in college graduates, ahead of Boston and behind only Boulder–Longmont, Co PMSA and Stamford–Norwalk, CT PMSA. Santa Cruz PMSA ranks eighth and the Oakland PMSA eleventh.<ref>2002 American Community Survey, SELECTED POPULATION CHARACTERISTICIS FOR LARGE METROPOLITAN AREAS, accessed November 5, 2007</ref>

Public

Image:Berkeley glade afternoon.jpg
University of California, Berkeley.

Seminaries

Private

Image:Stanford MainQuad.JPG
Stanford University.

Religious life

The San Francisco Bay Area has a very diverse religious life with thousands of churches, mosques, temples, and other religious centers. The Bay Area is home to Christians, Buddhist, Hindu, Jewish, Muslim, Sikh, and numerous other religious communities. San Francisco has historically been predominantly Roman Catholic, mainly due to the Italian and Irish immigrant population of the early 20th century, and Mexicans and Filipinos of the late 20th century; and also due to original Spaniards and the mission system.[citation needed]

Sports

TeamSportLeagueVenue
San Francisco 49ers Football National Football League Monster Park
Oakland Raiders Football National Football League McAfee Coliseum
San Francisco Giants Baseball National League (Major League Baseball) AT&T Park
Oakland Athletics Baseball American League (Major League Baseball) McAfee Coliseum
Golden State Warriors Basketball National Basketball Association Oracle Arena
San Jose Sharks Ice Hockey National Hockey League HP Pavilion at San Jose
San Jose Earthquakes Soccer Major League Soccer No fixed venue yet
San Francisco Nighthawks Soccer Women's Premier Soccer League Kezar Stadium
California Victory Soccer USL First Division Kezar Stadium
San Jose SaberCats Football Arena Football League HP Pavilion at San Jose
San Jose Stealth Lacrosse National Lacrosse League HP Pavilion at San Jose
San Francisco Dragons Lacrosse Major League Lacrosse Kezar Stadium
San Jose Giants Baseball California League (Minor League Baseball) San Jose Municipal Stadium
NCAA Division I College Sports

Music

Modèle:Seealso The San Fransisco Bay Area was home to one of the biggest thrash metal scenes in the United States, along with Tampa Bay, Florida. Containing acts like Slayer, Death Angel, Megadeth, Testament and Metallica (Although Metallica had initially formed in Los Angeles, it wasn't until their relocation to the East Bay area in 1983 that Cliff Burton and Kirk Hammett joined as bassist and lead guitarist, sealing the band's first, formative line-up.), the Bay Area Thrash scene was a huge impact on the Thrash metal world, as well as the Death Metal scene; as Possessed is considered as one of the first death metal bands.

The Bay Area saw a large punk movement from the 70s to the today. Bands such as the Dead Kennedys and Operation Ivy were popular in the 70s and 80s, with later bands such as Rancid, Green Day and AFI all coming out of Berkeley.

The Bay Area is now the home of the hyphy movement, which was started almost 10 years ago. The genre which was originally pioneered by the rappers Mac Dre, Too Short, Keak Da Sneak, and E-40, is now becoming more popular throughout the world. Hyphy themes such as ghost riding, thizzin' and going dumb are now common in other parts of the country. The Bay Area is also home to the Hieroglyphics hip hop crew, which is composed of local artists including the Souls of Mischief and Del tha Funkee Homosapien.

Regional counties, cities and suburbs

Image:SAN FRANCISCO UND UMGEBUNG.png
An early 20th century German map

Counties

Note: San Benito County and Santa Cruz County are sometimes considered not part of the Bay Area.

Cities and municipalities

See also

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Wikimedia Commons propose des documents multimédia libres sur San Francisco Bay Area.

References

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External links

Modèle:California Modèle:SF Bay AreaModèle:Link FA bg:Район на Санфранциския залив de:San Francisco Bay Area es:Área Metropolitana de San Francisco fr:Région urbaine de San Francisco hr:Zaljevsko područje San Francisca it:San Francisco Bay Area nl:San Francisco Bay Area ja:サンフランシスコ・ベイエリア no:San Francisco Bay Area ru:Область залива Сан-Франциско simple:San Francisco Bay Area sv:San Francisco Bay Area vi:Khu vực vịnh San Francisco zh:舊金山灣區