As a precautionary health measure for our support specialists in light of COVID-19, we're operating with a limited team. Those maps number in the hundreds and were cumbersome to search before they were digitized. Stay up to date on the coronavirus outbreak by signing up to our newsletter today. Assessments in January 2008[6] suggest that the northern Calaveras fault (the portion between Sunol and Danville) may be more likely to fail in the next few decades than previously thought. (Here is a regional map courtesy of Xerox PARC.) State of California. The Pacific Plate is a major section of the Earth's crust, gradually expanding by the eruption of magma along the East Pacific Rise to the southeast. [1] It runs east of the San Andreas, diverging from it in the vicinity of Hollister, California, and is responsible for the formation of the Calaveras Valley there. To the east lies the Clayton-Marsh Creek-Greenville Fault. Hollister, California is located South of the San Francisco Bay area. Menu Contact Search "Hayward, Calaveras faults may be connected, geologist says", Tracking the Elusive Calavaras Fault from Sunol to San Ramon, https://en.wikipedia.org/w/index.php?title=Calaveras_Fault&oldid=1003652521, Creative Commons Attribution-ShareAlike License, This page was last edited on 30 January 2021, at 00:54. Vacaville-Winters earthquake . ABAG earthquake scenario maps. It is one of the fastest creeping fault segments in the San Francisco Bay Region. Research on the Calaveras fault. California has been required by state law to map the known active surface faults since the 1970s. All are right lateral-moving strike-slip faults. Maps found for Calaveras Fault Trail. The faults also must be well-defined enough to be detected at or near the surface by a state geologist. Help ... You can customize the map before you print! "Up until now, the issue for people wanting to use the maps has been determining which one of the 547 maps we've produced suits their needs. Map search results for Calaveras Fault Trail. In 2019, the U.S. Geological Survey (USGS) released new earthquake hazard maps that raised the risk of earthquake damage in San Jose and the South Bay communities. The light grey mesh highlights the newly established connection between the two faults. When you have eliminated the JavaScript , whatever remains must be an empty page. It passes through or near the cities of Alamo, Danville, San Ramon, Dublin, Pleasanton, Sunol, Milpitas, San Jose, Gilroy, and Hollister. Between the San Andreas Fault and the Calaveras Fault lies the Hayward Fault, which diverges from the Calaveras Fault east of San Jose, California. … If true, this would have significant implications for the potential maximum strength of earthquakes on the Hayward, since this strength is determined by the maximum length of the fault rupture and this rupture could extend beyond the juncture point to include some portion of the Calaveras. Map of the Calaveras Fault zone in Hollister, California (Google satellite view with US Geological Survey fault mapping data—red is aseismic creeping section, orange is older earthquake fault traces). These major faults in California could affect 36 counties and 104 cities, so geologists have tried to make the site as user-friendly as possible. The compressive pressure is manifest in a significant thrust fault nearby on the western slope of the mountain, the Mount Diablo Thrust Fault,[3] the most active of its kind in the region and which is also capable of producing significant local earthquakes affecting the Alamo-Danville area. This Web site from the Association of Bay Area Governments has intensity maps for various scenario earthquakes in the San Francisco Bay Area. It is available from the California Geological Survey. This map was created by a user. Get a map for any place in the world. A fault is a fracture or group of closely associated fractures in the crust of the Earth along which rocks on one side have moved relative to those on the other side. Now that they are online, anyone can search an address with a little help from Google Maps to see if it's within an earthquake surface fault zone. Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep. In an effort to protect lives and homes, California has published an online map of all the state's major faults that could rupture the Earth's surface during an earthquake. Please deactivate your ad blocker in order to see our subscription offer, http://www.quake.ca.gov/gmaps/ap/ap_maps.htm, Massive Chile Quake May Have Set Off California Shaking, 7 Ways the Earth Changes in the Blink of an Eye, SpaceX's Crew-1 astronauts break 47-year US space record. The Hayward fault zone is truncated to the south by the Calaveras fault, which trends about north 10 west, and so forms an oblique east and south boundary. A magnitude 5.6 earthquake occurred on the Calaveras Fault on October 30, 2007 at 20:04 PDT (October 31, at 03:04 UTC), near Alum Rock. The West Napa Fault in Napa County is believed to be a continuation of the Calaveras Fault north of the Carquinez Strait. San Diego. Vacaville, CA. The most dangerous fault in the Bay Area is, as of now, due to fail at any time. To the east of the Hayward-Rodgers Creek fault, the Calaveras fault extends 123 km (76 mi), splaying from the San Andreas fault near Hollister and terminating at Danville at its northern end. Figure 2-1. Forms terrane between 36 deg N and 38 deg 45'N bounded on west by Melones fault zone and Kings-Kaweah suture and on east by rocks of Sierra Nevada batholith. Researchers at several institutions are using small earthquakes to study the behavior of the Calaveras fault. Open in Google Maps; 2. Also under state law, home sellers are required to disclose whether their home is in a fault zone. 9 of 32 10 of 32 Calaveras Fault (zoomed in on northern section) Cities and towns on or near the fault: Alamo, Danville, San Ramon, Dublin, Pleasanton, Kilkare Woods, Sunol . The earthquake fault zone map is online at http://www.quake.ca.gov/gmaps/ap/ap_maps.htm. Only faults that have ruptured the ground in the past 11,000 years are considered active and are included in the maps, said Bill Bryant, senior engineering geologist at the California Geological Survey. COVID-19 vaccines: What does 95% efficacy actually mean? Surface ruptures during that quake devastated California. If a developer wants to build a subdivision, say, they are usually required to build about 50 feet (15 meters) away from the fault to reduce their earthquake risk , Bryant said. To the east of the Hayward lies the Calaveras Fault. Just like searching for directions, someone can search an address and if it's in a fault zone it will be highlighted. Geologic map of the Calaveras Fault To the east of the Hayward-Rodgers Creek fault, the Calaveras fault extends 123 km (76 mi), splaying from the San Andreas fault near … Geologic map of the Calaveras Fault To the east of the Hayward-Rodgers Creek fault, the Calaveras fault extends 123 km (76 mi), splaying from the San Andreas fault near … Position your mouse over the map and use your mouse-wheel to zoom in or out. Although it has been known for some time that the Calaveras and Hayward faults merge in the South Bay region, recent geological studies[5] suggest that the Calaveras and Hayward faults may be even more closely connected horizontally deep beneath the surface, angling toward each other with depth until they become a single fault. Enable JavaScript to see Google Maps. The easternmost zone is … This will help with the geological investigations that are required to obtain a building permit, Bryant said. Close by the city is the Calaveras fault, which winds through eastern Santa Clara county. Ground water studies. We've employed Google Maps address-matching technology to solve that problem," said John Parrish, of the California Geological Survey in Sacramento, in a statement.