San francisco fault map

When we think of the next big earthquake, we think of the San Andreas fault, san francisco fault map. The San Andreas fault line formed about 30 million years ago as the North American plate engulfed san francisco fault map 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.

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.

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. 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? What is the Earthquake Risk in San Francisco. Already a CEA policyholder? Manage your policy. Learn about Personal Preparedness. Translate Translate. North Coast. What You Need To Know.

The aim was to collect core samples and make direct geophysical and geochemical observations to better understand fault behavior at depth. Colorado River Valley.

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. In this region known as the Salton Trough , the plate boundary has been rifting and pulling apart, creating a new mid-ocean ridge that is an extension of the Gulf of California.

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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. Hazard levels are less likely to be accurate if your neighborhood is on or near the border between zones. The information in this map application is not a substitute for a site-specific investigation by a licensed professional. You are here. Hazard Viewer.

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The San Andreas fault is the longest fault in California and can cause powerful earthquakes—as big as magnitude 8—that can still generate strong shaking levels in San Diego. The Elsinore and San Jacinto faults cut through East County and can also generate moderately-sized but potentially damaging earthquakes. Double-clicking anywhere on the map centers it. San Andreas Fault Salinian Block. Get a premium estimate now Evaluating Geologic Hazards Near Your House Find out about the primary geologic hazards where you live could affect your home during an earthquake. Northwest of Frazier Park, the fault runs through the Carrizo Plain , a long, treeless plain where much of the fault is plainly visible. However, according to some of his reports from and , he actually named it after the surrounding San Andreas Valley. In other projects. The San Andreas began to form in the mid Cenozoic about 30 Mya million years ago. Retrieved March 19,

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The lake was created from an extensional step over in the fault, which created a natural depression where water could settle. What You Need To Know. 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. Major seismically active faults of North America. Studies of the relative motions of the Pacific and North American plates have shown that only about 75 percent of the motion can be accounted for in the movements of the San Andreas and its various branch faults. Retrieved May 28, What is the Earthquake Risk in San Francisco. Make or purchase an earthquake safety kit. 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. Life After a Big Quake Without earthquake insurance, you will be responsible for all costs to repair or rebuild — or to live and eat elsewhere — if an earthquake forces you from your home. Retrieved October 26,