2 edition of Ground shaking in San Francisco found in the catalog.
Ground shaking in San Francisco
United States Geological Survey
by For sale by USGS Information Services
Written in English
|The Physical Object|
A large part of the region’s population lives within 50 miles of the San Andreas fault and could be exposed to very strong levels of ground shaking in a major earthquake. Many other faults, such as the San Jacinto fault, create smaller, yet more frequent earthquakes. The earthquake that shook San Francisco sent out a wake-up call that continues to echo across the country. Produced by Retro Report Read the story here.
Deep beneath the surface, our planet is a reactor, and one of the ways you'll feel this activity is when there's an earthquake. Learn what an earthquake is and how an earthquake happens. Get this from a library! On shaky ground. Supplement: a guide to assessing impacts of future earthquakes using ground shaking hazard maps for the San Francisco Bay Area. [Jeanne B Perkins; Association of Bay Area Governments.].
Earthquake Ground Shaking and its Potential Effects in the San Francisco Bay Region for a Repeat of the Great Earthquake Part 1: (18 slides, minutes) and Earthquake Damage. San Francisco's risk for a local source tsunami is low. Quick Tips: Move inland and head to higher ground during a tsunami. If you are in a coastal area and feel an earthquake with strong shaking lasting a minute or more, drop, cover, and hold on until the shaking stops, then move immediately to higher ground.
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Near the ground surface, strong shaking can result in nonlinear soil behavior or raise pore fluid pressure causing liquefaction. Likewise, the geometry of a man-made structure, the construction materials, the type of ground, and its anchorage in the ground affect its vulnerability to damage during the shaking.
The columns failed partially in response to ground shaking from the 17 October Loma Prieta earthquake amplified by loose sediments near the Oakland waterfront. 41 people were killed in the collapse. Image by H.G. Wilshire, U.S.
Geological Survey. Below is an image from the Marina District in San Francisco. New earthquake model shows 'significantly increased ground shaking' in 2 Bay Area locations By Amy Graff, SFGATE Published am PST, Friday, Decem ISBN: OCLC Number: Language Note: In English.
Notes: Shows simplified geology on aerial photographic base. Accompanied by text: Colorful map shows which areas of San Francisco shake the most in large earthquakes.
Anna Kramer is a business and tech reporting intern for the San Francisco Chronicle. Before she joined the Chronicle, she covered privacy and technology for. Areas situated in sediment-filled valleys sustained stronger shaking than nearby bedrock sites, and the strongest shaking occurred in areas where ground reclaimed from San Francisco Bay failed in the earthquake.
Modern seismic-zonation practice accounts for the differences in seismic hazard posed by varying geologic conditions. Shaking of the ground caused by the passage of seismic waves, especially surface waves near the epicentre of the earthquake are responsible for the most damage during an earthquake.
The intensity of ground shaking depends on: conditions of the local geology influence events: solid bedrock is far less subject to intense shaking than loose sediment. On Octoa magnitude earthquake hit the San Francisco Bay Area, killing 67 people and causing more than $5 billion in damages.
Despite the fact. Ground view of collapsed building and burned area at Beach and Divisadero Streets, Marina District, San Francisco, following the Octo Loma Prieta earthquake. At p.m. (PDT), the magnitude (moment magnitude; surface-wave magnitude, ) earthquake severely shook the San Francisco and Monterey Bay regions.
The San Andreas fault event was preceded from to by 18 earthquakes of M ≥ and was followed by quiescence, with only three earthquakes of M ≥ until Shaking was most intense in Santa Rosa and San Francisco.
In San Francisco, broken water mains kept firefighters from battling the fires that swept through the city and contributed to the devastation shown in this photograph (looking south) taken by George Lawrence by his “Captive Airship,” or kite train 5 weeks after the earthquake.
A more thorough analysis of the soils under the San Jose and Walnut Creek areas prompted the USGS to increase shaking estimates by 10. San Francisco earthquake ofa major earthquake and fire that destroyed s buildings and killed more than 3, people. The shaking was felt from Los Angeles in the south to Coos Bay, Oregon, in the north.
Damage was severe in San Francisco and in other towns situated near the San. The simulations show how ground moved on the two sides of the San Andreas fault and how seismic waves radiated away from the fault to produce the shaking. The earthquake, which began 2 miles offshore from the City of San Francisco, ultimately grew to cause shaking and damage along more than miles of the San Andreas Fault.
The Marina District was the part of San Francisco most heavily damaged in the Loma Prieta earthquake because it was built on uncompacted, sandy ground in an area with a shallow water table. These conditions caused shaking to be amplified and some areas of ground to "liquefy.".
Little was known about the San Andreas fault before a massive earthquake struck San Francisco in But that changed when a team of scientists mapped the fault and produced a.
Sporting Green // San Francisco Giants Joey Bart’s emotional reaction to becoming a Giant: ‘I was shaking for like 30 minutes’ John Shea Aug. 20, Updated: Aug. 20, 7 p.m. Ground shaking in San Francisco / U.S.
Department of the Interior, U.S. Geological Survey ; by Jack Boatwright, Linda Seekins, and Manuel G. Bonilla ; cartographic production by. Figure Seismograms of a magnitude aftershock of the Loma Prieta earthquake on Octoat three temporary stations at the north end of San Francisco Peninsula, showing amplification of ground motion in two soil sites in the Marina district (PUC, LMS).
Above: Frame from the recently released computer simulation shows where and how hard the ground was shaking 15 seconds after the start of the San Francisco earthquake. Red colors indicate greater shaking.
The earthquake lasted about 60 seconds, during which it spread to cause shaking and damage along more than miles of the San Andreas Fault.
During the first quake, weak shaking was felt in San Francisco, Oakland and San Jose, per the USGS. A magnitude foreshock also took place 10 minutes earlier near Pleasant Hill.If you were building a home in San Francisco, on what type of material would you build in order to minimize potential earthquake damage?
A) sand and gravel B) bay mud C) stream deposits ground cracking D) ground shaking. D. This is a precursor of all earthquakes. A) unusual animal behavior. San Francisco lives with the certainty that the Big One will come.
But the city is also putting up taller and taller buildings clustered closer and closer together because of the state’s severe.