San francisco fault map

Select your county from the dropdown menu above, or click on your county on the California map to the left to learn more about California earthquake risk and faults near you, san francisco fault map. How to Strengthen Your House. See the USGS interactive fault map to learn more about faults in this area. What is the Earthquake Risk in San Diego?

From space, the San Andreas Fault and its attending landforms are beautifully revealed. By using the buttons at the upper left to zoom and pan, and those in the upper right to switch between photographs and the base map or both by clicking 'Hybrid' , the fault's intimate role in California becomes apparent. Double-clicking anywhere on the map centers it. Information about how the map was made can be found below the map. The location of the San Andreas Fault is shown on this map. Its trace is marked by red dots connected by thin red straight lines. The positions were measured from professional geological maps, primarily those of the United States Geological Survey, California Geological Survey, Dibblee maps and geological literature.

San francisco fault map

When we think of the next big earthquake, we think of the San Andreas fault. The San Andreas fault line formed about 30 million years ago as the North American plate engulfed nearly all of the Farallon plate. Since then, the North American plate has ground against the Pacific plate at a boundary called a strike-slip fault. This fault is one of the largest faults in the world, running more than miles from the Salton Sea to Cape Mendocino. It carves the state in two. The two plates crisscross with dozens of active and passive earthquake faults. See Your Local Earthquake Risk. It can cause powerful earthquakes—as big as magnitude 8—that would affect high population communities in SoCal. A San Andreas earthquake would be classified as occurring on a strike-slip fault. Strike-slip faults are found along boundaries of tectonic plates sliding past each other. The walls of rock move to the left relative to one another, or to the right relative to one another. These faults are formed by horizontal compression.

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The San Andreas Fault is a continental right-lateral strike-slip transform fault that extends roughly 1, kilometers mi through California. Traditionally, for scientific purposes, the fault has been classified into three main segments northern, central, and southern , each with different characteristics and a different degree of earthquake risk. The average slip rate along the entire fault ranges from 20 to 35 mm 0. In the north, the fault terminates offshore near Eureka, California at the Mendocino Triple Junction , where three tectonic plates meet. It has been hypothesized that a major earthquake along the Cascadia Subduction Zone could trigger a rupture along the San Andreas Fault. Here, the plate motion is being reorganized from right-lateral to divergent.

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San francisco fault map

The Hazard Viewer is a one-of-its-kind interactive map of regional hazards, featuring the best available mapping resources and data for each hazard. The Hazard Viewer is a one-of-its-kind interactive map of regional hazards, curated from the most relevant, current maps for the nine-county Bay Area. It brings together the best set of mapping resources that exist in the region for each hazard. An easy-to-use tool for contextualizing local risk at the household-, neighborhood-, jurisdiction- and county-level, the Hazard Viewer includes layers for viewing:. The information provided in the Hazard Viewer is intended for planning use only and is not intended to be site-specific. Rather, it depicts general risks within the neighborhoods and the relative risks from community to community.

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Archived from the original on October 1, University of California — San Diego. Latches on kitchen cabinets or other cabinets that will not hold the door closed during shaking. Landslides, liquefaction, or levee failure. David K. Authority control databases. In particular, scientific research performed during the last 23 years has given rise to about 3, publications. Government disaster assistance, if available, may only come in the form of a small grant or capped loan, which may cover only a portion of your repair costs and may need to be repaid. After a Damaging Earthquake Strikes. Retrieved May 15, In addition to volcanoes, this is also earthquake country. The location of the San Andreas Fault is shown on this map.

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That study predicted that a magnitude 7. See also: List of earthquakes in California. June 12, The last major earthquake occurring in the magnitude 7. After that, it runs underwater along the coast until it nears Cape Mendocino , where it begins to bend to the west, terminating at the Mendocino Triple Junction. Active faults at the base of the Sierra Nevada mountain range and within the basins to the east have caused damaging earthquakes in the past, such as the Owens Valley earthquake. Recently, on Dec. While the San Andreas Fault Zone is the most studied in the world, nothing can prevent a major earthquake from happening. Flammable liquids, such as painting or cleaning products, which would be safer in a garage or an outside shed. Colorado River mouth. It will create the biggest earthquakes—as big as magnitude 8—that will disrupt the whole region.