San francisco fault map

From space, the San Andreas Fault and its attending landforms are beautifully revealed.

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.

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. USGS scenarios project more than 1, deaths, and 50, injuries due to a major Southern San Andreas fault earthquake.

It was formed by a transform boundary. These and numerous other faults are capable of damaging earthquakessimilar to the San Francisco and Loma Prieta earthquakes.

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.

Official websites use. Share sensitive information only on official, secure websites. Real-Time Earthquakes. Earthquakes in Catalog. View past earthquakes in Google Earth. Tectonic Plate Boundaries. Explore multiple Google Earth layers related to the geology and geologic hazards of the greater Bay Area.

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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Contents move to sidebar hide. In other projects. How to prepare for an earthquake While the San Andreas Fault Zone is the most studied in the world, nothing can prevent a major earthquake from happening. Currently, it is believed that the modern San Andreas will eventually transfer its motion toward a fault within the Eastern California Shear Zone. State of California. Geologic feature in California. Retrieved October 26, United States , Mexico. Decrease your risk of San Andreas earthquake damage and injury from an earthquake by identifying possible home hazards: Tall, heavy furniture that could topple, such as bookcases, china cabinets, or modular wall units. Already a CEA policyholder? See the USGS interactive fault map to learn more about faults in this area. Retrieved March 1, Is your house near the San Andreas fault? June 12, Please help improve this article by adding citations to reliable sources in this section.

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This tectonic boundary between the Pacific and North American tectonic plates is still very much active today and reminds us often that we live in earthquake country. The southern segment, which stretches from Parkfield in Monterey County all the way to the Salton Sea , is capable of an 8. Columbia Climate School. Retrieved March 1, The main southern section of the San Andreas Fault proper has only existed for about 5 million years. Hanging plants in heavy pots that could swing free of hooks. San Andreas Fault Salinian Block. In , geologist Thomas Dibblee concluded that hundreds of miles of lateral movement could occur along the fault. Bibcode : GeoJI. December Learn how and when to remove this template message.