1973, 1989; Greene 1977, 1990; McCulloch and Greene 199… A side-scan sonar survey was conducted of Monterey Canyon and the San Gregorio fault zone, off shore of Monterey Bay. This zone appears to connect with faults mapped on land near Ano Nuevo Point and Point Sur. Archived report (descriptions no longer maintained) San Gregorio fault zone, San Gregorio section (Class A) No. This map was created by a user. The southern end of the fault is in southern Monterey Bay, and the northern end is about 20 km northwest of San Francisco, near Bolinas Bay, where the San Gregorio intersects the San Andreas Fault. The San Andreas fault is third at 22 percent. The San Gregorio Fault zone occurs predominantly in the offshore and extends 400 km from Point Conception on the south to Bolinas and Point Reyes on the north (Dickinson and others, 2005), coming onland at coastal promontories such as Pescadero Point in the map area and Pillar Point, a few km north of Half Moon Bay (sheet 9). Most of the San Gregorio fault trace is located offshore beneath the waters of Monterey Bay, Half Moon Bay, and the Pacific Ocean, though it cuts across land near Point Año Nuevo and Pillar Point. [2], "The Northern San Gregorio Fault Zone: Evidence for the Timing of Late Holocene Earthquakes near Seal Cove, California", Rescue Lineament-Bear Mountains fault zone, https://en.wikipedia.org/w/index.php?title=San_Gregorio_Fault&oldid=944060999, Creative Commons Attribution-ShareAlike License, This page was last edited on 5 March 2020, at 13:45. The peninsula then started migrating north along the San Gregorio fault to merge alongside the San Andreas Fault along which it now travels. [1] The movement of the San Gregorio is right-lateral strike-slip, and the slip rate is estimated to be 4 to 10 mm/year (0.2 to 0.4 inch/year). [2], The Hosgri Fault is a component of the San Andreas Fault system. Introduction The San Gregorio fault zone is the principal tectonic structure west of the San Andreas fault in the coastal region of central California between Monterey Bay and Bolinas La- goon. The San Gregorio fault is the principal active fault west of the San Andreas fault in central coastal California, yet it remains the largest known fault in the region whose seismogenic potential is not known. Like the San Andreas fault, the San Gregorio is a right lateral strike slip fault. Using Google Maps, go to 37°30’13.9” 122°29’47.4” (37.503861, -122.496500). 85 Boulders of serpentinite and greenstone can be viewed along the paths and in the walls around the Vista Point. The acoustic character and morphology of the sonar images, enhanced by SeaBeam bathymetry, show the path of the San Gregorio fault zone across the shelf, upper slope, and Monterey Canyon. Which describes the reason for more potential damage from earthquakes in the Bay Area than south of the Bay Area? Filed Under: Carmel Valley, Earthquake, Earthquakes, Quake, San Gregorio Fault… Rodgers Creeks Fault. The Palo Colorado-San Gregorio fault zone parallels the Hayward fault and resembles that fault in length, seismicity, and sense of movement. Sea level rise also may bring changes to our park. The fault system (including its … The San Gregorio fault is the westernmost major fault that is part of the San Andreas Fault system. The faults shown here are represented by simple lines which do not show how deep and large they are. USGS Show More Show Less 21 of 21 San Gregorio Fault. The San Andreas fault is the primary feature of the system and the longest fault in California, slicing through Los Angeles County along the north side of the San Gabriel Mountains. The Monterey Bay-Tularcitos faults, and many other area fault zones are both in the bay and on land: San Gregorio fault zone, Cypress Point fault, Reliz fault zone, San Andreas fault zone, Zayante-Vergeles fault zone, and Butano fault. The MBNMS is located along the active transform boundary (the San Andreas fault system) separating the Pacific Plate from the North American Plate. Like the San Andreas fault, the San Gregorio is a right lateral strike slip fault. The most recent major earthquake along the fault occurred some time between 1270-1775 AD, with an estimated magnitude of 7 to 7.25. It's a Not chosen size geocache, with difficulty of 1.5, terrain of 1.5. [1] The fault system (including its branches) is some 260 mi (420 km) long, and is a right-lateral strand of the San Andreas Fault system. San Gregorio Fault. This is the Santa Cruz coastline and you have seen this area in past labs. The Hunting Creek, Berryessa, Green Valley, Concord fault system right behind at 16 percent and the San Gregorio fault line follows at 6 percent. The Hosgri Fault (also Hosgri Fault Zone, San Gregorio-Hosgri Fault Zone) is an offshore fault zone located near the Central Coast of California in San Luis Obispo County.The main fault stretches for about 87 miles (140 km), and is located nearest to the coastal communities of Cambria, San Simeon, Morro Bay, Baywood Park-Los Osos and Avila Beach. Length: N/A. The fault is located primarily offshore, with strands intersecting the coastline at only two locations: between Pt. The San Andreas Fault and other Bay Area fault zones are on both sides of the bay: San Jose fault, Berrocal fault zone, Hayward fault zone, Chabot fault, San Gregorio fault zone and others. San Gregorio Fault: | The |San Gregorio Fault| is an active |earthquake fault| located off the coast of |Northe... World Heritage Encyclopedia, the aggregation of the largest online encyclopedias available, and the most definitive collection ever assembled. The San Andreas fault system is creeping in the bay area. As of January 12, 2017, the USGS maintains a limited number of metadata fields that characterize the Quaternary faults and folds of the United States. [1] The November 4, 1927 Lompoc earthquake (magnitude 7.1) is thought to have occurred (uncertainty) on this fault.[4]. The faults shown here are represented by simple lines which do not show how deep and large they are. Learn how to create your own. The San Gregorio fault is the westernmost major fault that is part of the San Andreas Fault system. The most significant of these faults is the San Andreas Fault, a 750-mile-long transform fault that runs across California. • San Gregorio fault: The San Gregorio fault runs west of the San Andreas, roughly off the coast of the Bay Area and along seashore areas of Marin … movement on San Gregorio Fault The San Andreas Fault, considered a long transform fault, passes to the east of Monterey Bay in west-central California, USA. Largest recorded earthquake: Possibly earthquakes with magnitude 7.0 (A lot less is known about the San Gregorio Fault … Here the fault system is over 100 km wide and incorporates faults in the offshore, including those of the Palo Colorado-San Gregorio and Monterey Bay fault zones (Figure 2). The San Gregorio Fault is an active, 209 km (130 mi) long fault located off the coast of Northern California. The main fault stretches for about 87 miles (140 km), and is located nearest to the coastal communities of Cambria, San Simeon, Morro Bay, Baywood Park-Los Osos and Avila Beach. It can cause powerful earthquakes—as big as magnitude 8. For the most up-to-date information, please refer to the interactive fault map. The San Andreas Fault sits at 22 percent, with the Concord Fault at 16 percent, and the San Gregorio Fault at six percent. San Gregorio Fault Last updated February 20, 2019 U.S. Geological Survey map showing the trace of the San Gregorio Fault in yellow, lower center.. Filed Under: Carmel Valley, Earthquake, Earthquakes, Quake, San Gregorio is a right strike., Earthquake, Earthquakes, Quake, San Gregorio fault viewed along the fault lies 2½... More recently in 2008, yet another even closer fault was discovered the. 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