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. [5] More recently in 2008, yet another even closer fault was discovered, the Shoreline Fault 1 mile from the NPP. 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. 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 fault is located primarily offshore, with strands intersecting the coastline at only two locations: between Pt. These fault zones are seismically active, and in many places offset the seafloor or Quaternary sedimentary rocks (Greene et al. USGS Show More Show Less 21 of 21 San Gregorio Fault. Like the San Andreas fault, the San Gregorio is a right lateral strike slip fault. This is the Santa Cruz coastline and you have seen this area in past labs. Early-Morning Magnitude 3.5 Earthquake Shakes Carmel Valley Along San Gregorio Fault. For the most up-to-date information, please refer to the interactive fault map. [2], The Hosgri Fault is a component of the San Andreas Fault system. Concord Fault. In fact, the fault lies only 2½ miles offshore from the nuclear power plant. The San Gregorio Fault is an active, 209 km (130 mi) long fault located off the coast of Northern California. Point Reyes National Seashore is a park on the move, currently docked at Olema and Point Reyes Station, but destined to continue to move. [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. Seismologists monitor activity on the Hosgri fault constantly because of its physical proximity to the nuclear Diablo Canyon Power Plant. However, it is actually a wide fault zone with several different smaller faults from the San Gregorio fault offshore of Monterey Bay in the west to western Nevada in the east (figure 1). [1] The November 4, 1927 Lompoc earthquake (magnitude 7.1) is thought to have occurred (uncertainty) on this fault.[4]. Coordinates: 35°07′N 119°39′W / 35.117°N 119.650°W / 35.117; -119.650, Geological Society of America:STRUCTURAL ANALYSIS OF THE SAN SIMEON FAULT ZONE, CALIFORNIA: IMPLICATIONS FOR TRANSFORM TECTONICS, "A Seismological Shoot-Out at Diablo Canyon", American Association for the Advancement of Science, Rescue Lineament-Bear Mountains fault zone, https://en.wikipedia.org/w/index.php?title=Hosgri_Fault&oldid=993327880, Geology of San Luis Obispo County, California, San Luis Obispo County, California geography stubs, Creative Commons Attribution-ShareAlike License, This page was last edited on 10 December 2020, at 01:26. Archived report (descriptions no longer maintained) San Gregorio fault zone, San Gregorio section (Class A) No. 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's located in California, United States.Along the Big Sur coastline, just an easy walk from the highway, lies an easily accessible fault to explore! The San Andreas fault is third at 22 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.. During Tuesday’s presentation, Ladinsky plans to discuss the complexity of the fault line and how it has influenced the surrounding landscape. The Hunting Creek, Berryessa, Green Valley, Concord fault system right behind at 16 percent and the San Gregorio fault line follows at 6 percent. 60a The fault system (including its … The Palo Colorado-San Gregorio fault zone parallels the Hayward fault and resembles that fault in length, seismicity, and sense of movement. The San Andreas Fault sits at 22 percent, with the Concord Fault at 16 percent, and the San Gregorio Fault at six percent. 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