The Calaveras Fault and lost seismograms . PDF U. c. 20555 Meeting of Subcommittee on GETR, San However, the broader net . The earthquakes are strike-slip events within the Calaveras Fault zone near the north end of the Pleasanton Fault. It can cause powerful earthquakes—as big as magnitude 8. "Every earthquake has its own aftershock sequence," Oppenheimer said. Calaveras Fault - strike-slip faults .. Info | About | Wh The good news is that the San Andreas fault complex (including the Hayward, Calaveras, Pleasanton faults , etc) does produce periodic clusters of quakes like this, without the clusters necessarily meaning a larger quake in imminent. The Pleasanton Fault is a seismically active geological structure in Alameda County and Contra Costa County, California, USA. Cities resting on the fault include Alamo, Danville, San Ramon, Dublin, Pleasanton, Sunol, Milpitas, San Jose, Gilroy, and Hollister. Pleasanton Fault - Wikipedia It is safe peaceful and beautiful. PDF Basin Setting The San Andreas fault is located approximately 27 miles to the southwest. And who can forget the Loma Prieta . Strain accumulation along the San Andreas fault system ... 3 The active faults4 in or near the Pleasanton Planning Area include the Calaveras, Concord-Green Valley, Green Valley, Greenville, Hayward, Mt. SITE CONDITIONS The fault map of California (1973) shows one major earthquake northwest of Pleasanton on the Calaveras fault in 1861, and a zone of active creep west of the GETR site. Hayward fault zone. Diablo Thrust, and San Andreas Faults. This fissure extended south to within a . It's worth a picture or two. Location. Parks, is difficult to locate precisely . Several magnitude 2 and 3 earthquakes rumbled through the San Francisco Bay Area on Friday. [1] It runs east of the San Andreas, diverging from it . Diablo and Telsa faults are examples. Calaveras 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 . We all remember the 1992 Northridge Earthquake in Southern California. As a result of that initial review anc a trench investigation which revealed the existence of a low angle thrust fault near the reactor, a Show Cause Order was issued on October 24, 1977. USGS Show More Show . "The San Ramon Valley does experience what are known as earthquake swarms - where there can be dozens of earthquakes over days and weeks," said USGS geophysicist Brian Kilgore. That's where the Calaveras Fault and the smaller Pleasanton Fault run southward, and the more deadly Hayward Fault lies not far away. Books, Study Tools and Lexicons. A study by the U.S. Geological Survey indicates that a portion of . The bad news is that such clusters also remind us that the stress in the rocks of the Bay Area is continually growing and shifting. pleasanton fault line . Even among scientists, few appreciate that the San Andreas fault is a transient, evolving system that, as seen today, is younger than the Grand Canyon and key to our understanding of earthquakes worldwide. In the Danville area, the fault zone transitions and steps over to the Concord fault, which continues north into Concord, Philibosian said. UC Berkeley reports that there is potential for larger earthquakes in the San Francisco Bay Area due to the direct connection between the Hayward and Calaveras faults. 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. Fault surface of calaveras fault near pleasanton, south of castleridge golf course. The City of Pleasanton experienced earthquakes in its past of magnitudes 6.0 - 6.9 in 1864, 1858 along the Calaveras Fault. In 1835, José María Amador . The Calaveras Fault is a major branch of the San Andreas Fault System that is located in northern California in the San Francisco Bay Area.Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep.The last large event was the 1984 Morgan Hill event and the last moderate earthquake was the 2007 Alum Rock event. The Hayward fault is located approximately 7¾ miles to the southwest. In the San Francisco Bay Area, movement across this plate boundary is concentrated on the SAF but also distributed, to a lesser extent, across several other faults including the Hayward and Calaveras faults. Hayward Fault, Calaveras Fault, etc. Most previous swarms in this area occurred on left-lateral faults that are nearly perpendicular to the Calaveras Fault. how . The Calaveras and Verona Faults are the only faults within the Planning To the east are the Calaveras and Greenville fault lines. Calaveras Fault. Diablo Thrust, and San Andreas Faults. Analysis of the area is complicated by the presence of two branches of the Pleasanton fault in addition to the Calaveras-Sunol fault. It can cause powerful earthquakes—as big as magnitude 8. Earthquake Storms - John Dvorak - 2021-11-15 "Dvorak has done earthquake science sterling service by . The U.S . Two other faults in the vicinity of the site are suspected as being active faults. The Calaveras Fault is a major branch of the San Andreas Fault System that is located in northern California in the San . The largest was a preliminary 3.6 quake that struck last Monday. The USGS says the quakes and subsequent aftershocks were likely part of the Calaveras Fault system, possibly centered on the Pleasanton Fault and that this could be the beginning of a long period of shakes. Uncategorized. "We have definitely had similar swarms along the Calaveras fault, Alamo, Danville, Pleasanton," Hellweg said. North American Plate, located east of the fault. 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 Hollister and terminating at Danville at its northern end. bounded on the west side by the Calaveras fault system and on the east by a less continuous syster of diverging and en echelon faults, of which the Greenville-Mt. The earthquake locations in the current swarm are diffuse and do not permit discrimination between faults, parallel to the Calaveras and Pleasanton faults and . The Calaveras Fault runs along the Danville - Pleasanton - Fremont corridor; The Hayward Fault runs along the Berkeley - Oakland - Fremont corridor ; In 2003, the United States Geological Survey (USGS) estimated that, in the next 30 years, an earthquake with a 6.7 magnitude or greater will strike the San Francisco Bay Area with a 62% probability. USGS Show More Show . Communication . Earthquake magnitude is a measure of overall earthquake size at the epicenter, and is recorded by the Richter Scale . It passes through or near the cities of San Jose, Milpitas, Fremont, Santa Clara, Danville, San Ramon, Dublin, Pleasanton, Sunol, Alamo, Gilroy, and Hollister. For the purposes of Table 5 , we used the location of the planned Cottonwood Creek Bridge - site coordinates are N 37.7033 °, W 121.8280°. calaveras fault pleasanton. It's the latest seismic activity to add to a swarm of 60 earthquakes greater than magnitude 1 to hit the Danville area in the past week. The Calaveras and Hayward faults extend up the east side of the San Francisco Bay. Based on present creep rates, the fault can be divided into two overall segments; that south of the Calaveras Reservoir, and the San Ramon segment (Kelson, et al, 1992), between Sunol and Danville. The good news is that the San Andreas fault complex (including the Hayward, Calaveras, Pleasanton faults , etc) does produce periodic clusters of quakes like this, without the clusters necessarily meaning a larger quake in imminent. Farther north, neither the gravity . The geometry of the Camp Parks network is adequate to isolate observed deformation to a particular fault (Fig. 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. It passes through or near the cities of Alamo, Danville, San Ramon, Dublin, Pleasanton, Sunol, Milpitas, San Jose, Gilroy, and Hollister. Nevertheless, given its structural position, In the San Ramon area, the fault is typified and Geologic Investigation, Castleridge Development, Foothill Road, Pleasanton, the western terminus of Alcosta Boulevard, as Harding (1973) originally suggested. I have also taken a group of youth on this hike. Other active faults in the vicinity of the site include the Hayward fault southeast extension, located about 11½ miles to the northwest; Hayward fault, located about 25½ miles to the northwest, the San Andreas fault, situated about • on the west by northwesterly trending ridges of the California Coast Ranges (including Pleasanton Ridge) and the Calaveras Fault, • on the north by stratigraphic and structural changes associated with relatively shallow bedrock and thin, clay -rich deposits sourced from the steeply-dipping bedrock of the Tassajara Uplands, • on the east by bedrock outcrops, thin alluvial deposits, and . The Hayward fault slices the football stadium at the University of California in half. I have made it to the top several times. Public Safety Element Adopted 07 21 09; Amended 02 05 13 5-4 widespread damage, striking the San Francisco Bay Area region before 2032.3 The active faults in or near the Pleasanton Planning Area include the Calaveras, Concord-Green Valley, Greenville, Hayward, Mt. The Pleasanton Ridge is a great place to hike by yourself to clear your head. The good news for Pleasanton is that the USGS thinks the largest earthquake possible on the Hayward Fault is a M7.3 and on the Calaveras Fault is a M6.9. You also can walk part of it and still get a nice workout. nearest active fault is the Calaveras fault, located about 3 miles to the southeast. West of Pleasanton (km 50 to 40), gravity data suggest that the CF dips steeply SW beneath the outcropping Great Valley sequence strata. As you approach the park on Calaveras Road, you are driving pretty much directly on the Calaveras fault, which stretches from the Hollister area north past Pleasanton. It runs east of the . The results of this investigation will help improve probability estimates for future earthquake occurrence in the San Francisco Bay area. Is Pacifica on a fault line? Pleasanton Fault. 2005 Pleasanton Plan 2025 5. The fault cuts through the towns of Walnut Creek, San Ramon, Dublin, Pleasanton, Sunol, and Hollister. Internacionalni medicinski časopis iz oblasti biomedicinskih nauka * International medical journal in the field of biomedical sciences * ISSN 2683-6254 (Štampano izd.) Download. The temblor was widely felt throughout the Bay Area. Calaveras and Las Positas faults are located approximately 2 miles southwest and 4 miles east of the study area, respectively. Then there's a long fun downhill followed by some very gentle rollers. The fault cuts through the towns of Walnut Creek, San Ramon, Dublin, Pleasanton, Sunol, and Hollister. Table 5 presents approximate distances to active faults in the site vicinity based on mapping by as CGS presented in an online fault database maintained by Caltrans. This is another good section for pacelines and enjoying . The report indicates the need for a replacement on the section on a steep, 26 percent sloping, hillside in the Sunol Valley immediately northeast of the Calaveras Fault, just southeast of I-680 . Figure V-2 shows active earthquake faults in the Bay Area and earthquake magnitudes. It was a major undertaking. Calaveras Fault. That set of mountains is a splinter of crustal rocks raised by the interaction of the Calaveras and Hayward faults on either side. So, in the long run, clusters . The park's bedrock geology is a . The Calaveras Fault is nearby. History . (Pleasanton Ridge). The San Ramon segment of the fault is bounded by Sunol and Danville. It passes through or near the cities of Alamo, Danville, San Ramon, Dublin, Pleasanton, Sunol, Milpitas, San Jose, Gilroy, and Hollister. With a slip rate of about 15 mm/yr (0.6 in/yr) and a length of about 100 km (60 mi), the Calaveras is highly active and certainly capable of a M7+ earthquake. The property is in the immediate vicinity of the Calaveras Fault, a potentially active The San Andreas Fault is the primary plate-boundary structure and extends northwest across the map area; it intersects the shoreline 10 km north of the map area at Pacifica . pleasanton fault line. The Calaveras Fault is on the west side of Pleasanton, much of it running adjacent to and under Foothill Road. The Greenville fault is located approximately 10 miles to the east. 0. calaveras fault pleasanton . active fault is the Calaveras fault, located about 2½ miles to the northeast. MOBILE, November 1, 2019 November 20, 2019. Near Calaveras . He recalled a 4.4 magnitude earthquake in the Alamo area . Calaveras Fault creep in downtown Hollister in April 2009. Initially, seismologists thought the Thursday quake occurred on the Calaveras Fault, which runs through the region. The San Ramon segment (Figure 1) is the dominant structural . It's due east of Fremont, behind Mission and Monument Peaks. Its northern boundary is also the boundary with Contra Costa County and is San Ramon's southern boundary. The USGS gave the Hayward Fault a 27% . Since that time, GE has continued to acquire data to better establish the mode of origin of the faults, their locations, degree of recurrent activity, and potential . As you approach the park on Calaveras Road, you are driving pretty much directly on the Calaveras fault, which stretches from the Hollister area north past Pleasanton. . Download Unionpedia on your Android™ device! This report is the second of a two part study addressing the seismic risk or hazard of the special nuclear materials (SNM) facility of the General Electric Vallecitos Nuclear Center at Pleasanton, California. This line shapefile contains fault lines in the offshore area of Pacifica, California. 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 Calaveras Fault and lost seismograms . Dublin is on the Calaveras Fault, which is a minor fault line in the Bay Area that begins near Calaveras Reservoir to the south and travels north through Pleasanton and western Dublin.
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