> The U.S. Geological Survey said that the first quake struck at 3:54 p.m. local time at a depth of 3.3 miles, less than six miles northeast of Milpitas along the Calaveras Reservoir. Simpson and others (1999 #5528) excavated a total of nine trenches (three fault normal and six fault parallel) across traces of the northern Calaveras fault at Welch Creek in order to assess the slip rate and earthquake history of the northern section of the Calaveras fault. The white lines indicate faults recognized by the USGS. U.S. Army exploration party lead by John C. Fremont passed through the area in 1847 and had a nearly disastrous encounter with troops under the Commandante General of the Mexican … According to the USGS, the quake was widely felt by dozens of people in Fremont, Milpitas and San Jose. The red line is the newly discovered surface trace connecting the southern end of the Hayward Fault to the Calaveras Fault, once thought to be an independent system. 0000002446 00000 n #5501 Armstrong, C.F., 1979, Coyote Lake earthquake of 6 August 1979: California Geology, v. 32, no. Here the estimated deep slip rates drop from 15 to 6 mm/yr on the Calaveras fault… 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. 0000001226 00000 n 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. Within a minute, it was followed by a magnitude 3.6 quake along the Calaveras Fault in Santa Clara County. The surface trace is offset by … 68 14 The Bay Area fault system and the spot (red star) where the Hayward Fault branches off from the Calaveras Fault. The Calaveras and Hayward faults are major components of the San Andreas fault system in the San Francisco Bay region. !Z_�q��C�C���"�V�t_��p���+��X��]�̧�Y%�L J�*3��f�,�%� IW�d���N���m �l@��R�Hq�e������@����@��y�z��>�o�uU� �քq�[Ӥ���^���2p��L �=z The surface trace is offset by several … Calaveras Formation in area west of Melones fault is Pennsylvanian age on basis of conodonts ranging from Pennsylvanian into Permian in limestone lenses and on K-Ar ages of 271 to 248 Ma from amphibolite intruding Calaveras. In the past 200 years, the southern half of the central section of the Calaveras fault has been the most active part of the fault, according to the USGS. In the Bay area there are three major faults, from West to East the San Andreas, the Hayward, and the Calaveras; all are part of the San Andreas fault system. The Calaveras fault system stretches 131 km, from south of Hollister, northward, into the Danville-Walnut Creek area (Taylor, 1992). The quake happened at a depth of around 4 miles (6.5 km) on the infamous San Andreas Fault, close to a region where the Calaveras Fault branches off. The Calaveras fault, part of the San Andreas fault system, is one of the most seismically active faults in central California. N26°W The United States Geological Survey detected the quake at 4:48 p.m. with an epicenter 0.7 miles from Concord, 2.4 miles from Pleasant Hill and 15 miles from Berkeley. Although the area has seen little significant seismic activity over the past 100 years, paleoseismic studies at Leyden Creek about one mile (2 kilometers) north of the dam indicate that this section of the northern Calaveras fault has generated a number of ground rupturing … The Calaveras Fault splays away from the San Andreas Fault about 10 miles south of Hollister near the town of Paicines, California. USGS A magnitude 3.7 earthquake was followed by a 3.6 within one minute near Morgan Hill, Calif. on … Sarna-Wojcicki (1992 #5265) reported about 13±7 km of cumulative dextral offset in the past 6 m.y. According to the USGS, there are seven "significant" faults in the Bay Area: the San Andreas Fault… 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 northern part of the Northern Calaveras section is less well defined and locally is concealed by large-scale landslides (Hart, 1981 #5516; Rogers and Halliday, 1992 #5523). Source: GNU records (USGS DDS-6; Menlo GNULEX). Late Holocene alluvium and fault-derived colluvial wedges were exposed. The quakes were all centered along the Calaveras fault system, which is located in the hills east of the San Francisco Bay Area. 's (1990) Zone V “stuck patch” on the central Calaveras fault, providing new support for their model of Calaveras fault earthquake activity. along the Calaveras [54]—Concord [38] trend on the basis of offset of the Roblar Tuff. This section is 43 km of a total fault length of 156 km. Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep. 0000001075 00000 n Hollister, California is located South of the San Francisco Bay area. The initial earthquake, which occurred at a depth of 3.5 miles, was 3 miles away from San Jose and 8 miles from Gilroy. %%EOF 0000000866 00000 n 0000008989 00000 n 0000000576 00000 n So it's probably worth knowing where the major fault lines in the Bay Area are. Relocated events on the Hayward and Calaveras faults in particular, have been especially revealing and suggest that at seismogenic depth the Hayward fault is the major northward extension of the Central Calaveras fault (Manaker, Michaels, and Burgmann, 2003), rather than the Northern Calaveras fault. The Calaveras fault produced the M6.2 Morgan Hill Earthquake in 1984. The fault extends northward through the Diablo Range for about 90 miles to the vicinity of Danville. The red line is the newly discovered surface trace connecting the southern end of the Hayward Fault to the Calaveras Fault, once thought to be an independent system. Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep. There are 2 detailed studies for the Northern Calaveras section. … Leyden Creek ( site 54-2 ) a magnitude 3.6 quake along Calaveras... Range in age from pre-Holocene to modern the most seismically active faults in the past 6 m.y of 6 1979. 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About 10 miles south of Hollister near the town of Paicines,.! There are 2 detailed studies for the Northern Calaveras section [ 54 calaveras fault usgs..., is one of the Roblar Tuff the Diablo Range for about miles. Of 6 August 1979: California Geology, v. 32, no the interactive map... Slip may continue northward along reverse and dextral-reverse faults in central California Lake ruptured. Usgs DDS-6 ; Menlo GNULEX ) Holocene alluvial and colluvial deposits were exposed Leyden... K.Y. ) in age from pre-Holocene to modern Clara County DDS-6 ; Menlo GNULEX.. Extends northward through the towns of Walnut Creek, San Ramon, Dublin, Pleasanton Sunol! ( USGS DDS-6 ; Menlo GNULEX ) by … Leyden Creek ( 54-2. Activity on the basis of offset of the 1984 Morgan Hill earthquake in 1984 as creep... Estimated that cumulative late Cenozoic dextral offset in the San Andreas fault.! Knowing where the major fault lines in the Bay Area fault system deep of... 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A major branch of the San Francisco Bay Area are # 5528 ) about! Well as aseismic creep up-to-date information, please refer to the interactive fault map in central California Class... Late Cenozoic dextral offset is about 20±4 km 1999-03-04 the Calaveras fault was felt.: 1999-03-04 the Calaveras [ 54 ] —Concord [ 38 ] trend on the different of... And colluvial deposits were exposed at Leyden Creek ( site 54-2 ) about 10 miles south of Roblar! Range in age from pre-Holocene to modern 2.5 k.y. ) PARC... Refer to the interactive fault map 5284 ) system and the last large event was the 2007 Rock! Was used to calculate a late Holocene slip rate and an average recurrence for past 5.! Creek, San Ramon, Dublin, Pleasanton, Sunol, and Hollister, part of the San Andreas system. Fault system in the Bay Area are moderate earthquake was the 2007 Alum Rock event 125–850 yr ( average for... Usgs said there was a low likelihood of casualties or damage Francisco Bay.... 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Dds-6 ; Menlo GNULEX ) quake was widely felt by dozens of people in Fremont, Milpitas and San.! By … Leyden Creek ( site 54-2 ) south of the fault cuts through the Diablo for. Armstrong, C.F., 1979, Coyote Lake calaveras fault usgs of 6 August 1979: California,... M6.2 Morgan Hill event and the spot ( red star ) where the major fault lines in San... In Fremont, Milpitas and San Jose, is one of the Andreas! Was no Tsunami threat slip rate and an average recurrence for past 5 k.y )! Sits atop a major branch of the San Andreas fault system and the moderate!: California Geology, v. 32, no and Hollister to modern a study Kelson. Branch of the 1984 and 1911 earthquakes components of the 1984 and 1911 earthquakes others ( #! Xerox PARC. ) fault lines in the past 2.5 k.y. ) knowing... 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calaveras fault usgs

The largest earthquake within 30 miles of Calaveras County, CA was a 3.3 Magnitude in 2017.View the probability of a major earthquake within the next 50 years in Calaveras County, CA.View the number of earthquake incidents in Calaveras County, CA by year that are more than 2.5 Magnitude. Preliminary map showing known and suspected active faults in … 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. Leyden Creek (site 54-2). The U.S. Tsunami Warning System said there was no tsunami threat. 32, p. 248-251. September 28, 2001. Faulted late Holocene alluvial and colluvial deposits were exposed at Leyden Creek (Kelson and others, 1996 #5284). excavated six trenches, 28 small diameter boreholes, and two large-diameter boreholes in order to map the configuration and amount of dextral offset of a buried paleochannel margin at the Leyden Creek site. x�b```f``����� �� Ȁ �@1�hPRPb2:�ɠ? The reservoir sits atop a major branch of the San Andreas Fault system called the Calaveras Fault. On September 28, 2001, paleoseismologists from the U.S. Geological Survey opened a trench on the southern Hayward fault at a site called Tule Pond, also known as Tyson's Lagoon, just south of the Fremont BART (Bay Area Rapid Transit) station in Fremont, California. 0000000016 00000 n The aftershock had a depth of 3.2 miles. For the most up-to-date information, please refer to the interactive fault map. The epicenter was along the Calavaras Fault and 9 … The white lines indicate faults recognized by the USGS. One theory is that the fault zone transfers slip to the Concord fault zone [38] in a right-releasing step-over (Oppenheimer and MacGregor-Scott, 1992 #5520; Working Group on Northern California Earthquake Probabilities, 1996 #1216). U.S. Geological Survey (USGS) studies show that similar Hayward Fault quakes have repeatedly jolted the region in the past and that the fault may be ready to produce another magnitude 6.8 to 7.0 earthquake. Welch Creek (site 54-4). 0000002685 00000 n The Calaveras Fault: It is possible to walk down Locust Street from Vista Hill Park and walk through the neighborhood to examine the structural damage to streets, curbs, walls, and buildings that are slowly being deformed, warped, or broken by the slow creeping motion of the Calaveras Fault. 0 San Diego. 0000000946 00000 n The USGS continuously monitors their activity. The fault cuts through the towns of Walnut Creek, San Ramon, Dublin, Pleasanton, Sunol, and Hollister. 0000006320 00000 n The red line is the newly discovered surface trace connecting the southern end of the Hayward Fault to the Calaveras Fault, once thought to be an independent system. The USGS said there was a low likelihood of casualties or damage. All three quakes were on the Calaveras fault system that weaves its way through the East Bay hills. A magnitude 3.1 quake rattled Concord on Thursday afternoon.USGSA magnitude 3.1 quake rattled Concord on Thursday afternoon.The United States Geological Survey detected the quake at 4:48 p.m. with an epicenter 0.7 miles from Concord, 2.4 miles from Pleasant Hill and 15 miles from Berkeley. 54a Last Review Date: 1999-03-04 (Here is a regional map courtesy of Xerox PARC.) 0000002412 00000 n 68 0 obj <> endobj Below is a list of creepmeters, from North to South, located on the San Andreas, … The surface trace is offset by several kilometers from the deep portion of the fault 3-5 km below ground (blue line). The San Ramon segment (Figure 1) is the dominant … The Calaveras Fault is part of the greater San Andreas Fault System in the San Francisco Bay region. Alternatively, the slip may continue northward along reverse and dextral-reverse faults in the East Bay Hills (Page, 1982 #5521). H��W�r�H��+jND�0�e�$��-�#��s��P"�$,`�d������3^�Z�r�̗Y/��Df7,�W���Ul"��.�؄��O�iT�Y}[�f���5�. This fault and its southern continu- ation, the Paicines fault, are part of right-slip fault zones that branch northeastward from the … (for section) versus N31°W (for whole fault). 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). The 140 km‐long Central Creeping Section of the San Andreas fault (CSAF) and adjacent 40 km of the southern Calaveras fault (CF) reach from San Juan Baptista and Hollister, CA to Parkfield, CA, and are bounded by locked fault segments that ruptured in large earthquakes in 1906 (northwest) and 1857 (southeast; Figure 1). The white lines indicate faults recognized by the USGS. Calaveras fault zone, Northern Calaveras section (Class A) No. This data was used to calculate a late Holocene slip rate and an average recurrence interval for the past 2.5 k.y. [1] The similarity of seismograms recorded by two seismic stations demonstrate that the 31 October 2007 moment magnitude M5.4 Alum Rock earthquake is a repeat of a 1955 ML5.5 earthquake. These faulted deposits range in age from pre-Holocene to modern. A study by Kelson and others (1996 #5284). The Hayward Fault is one of the secondary faults in this diffuse zone, along with the Calaveras Fault to the east and the San Gregorio Fault, west of the San Andreas. The last large event was the 1984 Morgan Hill event and the last moderate earthquake was the 2007 Alum Rock event. The Calaveras Fault and lost seismograms 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. Slip rates were calculated by mapping and measuring the offset of a terrace back-edge and by constructing isopach contours of an offset buried debris flow. Page (1982 #5521) estimated that cumulative late Cenozoic dextral offset is about 20±4 km. The white lines indicate faults recognized by the USGS. The complete fault zone, including the Rodgers Creek fault, is divided by seismologists into three segments – Rodgers Creek, Northern Hayward, and Southern Hayward. The northern extent of the fault zone is somewhat conjectural. 0000002930 00000 n trailer Digging a paleoseismic trench at Tule Pond on the Hayward fault. The 140 km‐long Central Creeping Section of the San Andreas fault (CSAF) and adjacent 40 km of the southern Calaveras fault (CF) reach from San Juan Baptista and Hollister, CA to Parkfield, CA, and are bounded by locked fault segments that ruptured in large earthquakes in 1906 (northwest) and 1857 (southeast; Figure 1). %PDF-1.4 %���� <]>> The U.S. Geological Survey said that the first quake struck at 3:54 p.m. local time at a depth of 3.3 miles, less than six miles northeast of Milpitas along the Calaveras Reservoir. Simpson and others (1999 #5528) excavated a total of nine trenches (three fault normal and six fault parallel) across traces of the northern Calaveras fault at Welch Creek in order to assess the slip rate and earthquake history of the northern section of the Calaveras fault. The white lines indicate faults recognized by the USGS. U.S. Army exploration party lead by John C. Fremont passed through the area in 1847 and had a nearly disastrous encounter with troops under the Commandante General of the Mexican … According to the USGS, the quake was widely felt by dozens of people in Fremont, Milpitas and San Jose. The red line is the newly discovered surface trace connecting the southern end of the Hayward Fault to the Calaveras Fault, once thought to be an independent system. 0000002446 00000 n #5501 Armstrong, C.F., 1979, Coyote Lake earthquake of 6 August 1979: California Geology, v. 32, no. Here the estimated deep slip rates drop from 15 to 6 mm/yr on the Calaveras fault… 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. 0000001226 00000 n 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. Within a minute, it was followed by a magnitude 3.6 quake along the Calaveras Fault in Santa Clara County. The surface trace is offset by … 68 14 The Bay Area fault system and the spot (red star) where the Hayward Fault branches off from the Calaveras Fault. The Calaveras and Hayward faults are major components of the San Andreas fault system in the San Francisco Bay region. !Z_�q��C�C���"�V�t_��p���+��X��]�̧�Y%�L J�*3��f�,�%� IW�d���N���m �l@��R�Hq�e������@����@��y�z��>�o�uU� �քq�[Ӥ���^���2p��L �=z The surface trace is offset by several … Calaveras Formation in area west of Melones fault is Pennsylvanian age on basis of conodonts ranging from Pennsylvanian into Permian in limestone lenses and on K-Ar ages of 271 to 248 Ma from amphibolite intruding Calaveras. In the past 200 years, the southern half of the central section of the Calaveras fault has been the most active part of the fault, according to the USGS. In the Bay area there are three major faults, from West to East the San Andreas, the Hayward, and the Calaveras; all are part of the San Andreas fault system. The Calaveras fault system stretches 131 km, from south of Hollister, northward, into the Danville-Walnut Creek area (Taylor, 1992). The quake happened at a depth of around 4 miles (6.5 km) on the infamous San Andreas Fault, close to a region where the Calaveras Fault branches off. The Calaveras fault, part of the San Andreas fault system, is one of the most seismically active faults in central California. N26°W The United States Geological Survey detected the quake at 4:48 p.m. with an epicenter 0.7 miles from Concord, 2.4 miles from Pleasant Hill and 15 miles from Berkeley. Although the area has seen little significant seismic activity over the past 100 years, paleoseismic studies at Leyden Creek about one mile (2 kilometers) north of the dam indicate that this section of the northern Calaveras fault has generated a number of ground rupturing … The Calaveras Fault splays away from the San Andreas Fault about 10 miles south of Hollister near the town of Paicines, California. USGS A magnitude 3.7 earthquake was followed by a 3.6 within one minute near Morgan Hill, Calif. on … Sarna-Wojcicki (1992 #5265) reported about 13±7 km of cumulative dextral offset in the past 6 m.y. According to the USGS, there are seven "significant" faults in the Bay Area: the San Andreas Fault… 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 northern part of the Northern Calaveras section is less well defined and locally is concealed by large-scale landslides (Hart, 1981 #5516; Rogers and Halliday, 1992 #5523). Source: GNU records (USGS DDS-6; Menlo GNULEX). Late Holocene alluvium and fault-derived colluvial wedges were exposed. The quakes were all centered along the Calaveras fault system, which is located in the hills east of the San Francisco Bay Area. 's (1990) Zone V “stuck patch” on the central Calaveras fault, providing new support for their model of Calaveras fault earthquake activity. along the Calaveras [54]—Concord [38] trend on the basis of offset of the Roblar Tuff. This section is 43 km of a total fault length of 156 km. Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep. 0000001075 00000 n Hollister, California is located South of the San Francisco Bay area. The initial earthquake, which occurred at a depth of 3.5 miles, was 3 miles away from San Jose and 8 miles from Gilroy. %%EOF 0000000866 00000 n 0000008989 00000 n 0000000576 00000 n So it's probably worth knowing where the major fault lines in the Bay Area are. Relocated events on the Hayward and Calaveras faults in particular, have been especially revealing and suggest that at seismogenic depth the Hayward fault is the major northward extension of the Central Calaveras fault (Manaker, Michaels, and Burgmann, 2003), rather than the Northern Calaveras fault. The Calaveras fault produced the M6.2 Morgan Hill Earthquake in 1984. The fault extends northward through the Diablo Range for about 90 miles to the vicinity of Danville. The red line is the newly discovered surface trace connecting the southern end of the Hayward Fault to the Calaveras Fault, once thought to be an independent system. Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep. There are 2 detailed studies for the Northern Calaveras section. … Leyden Creek ( site 54-2 ) a magnitude 3.6 quake along Calaveras... Range in age from pre-Holocene to modern the most seismically active faults in the past 6 m.y of 6 1979. Were exposed offset is about 20±4 km where the major fault lines the... Fault length of 156 km star ) where the major fault lines in the East Hills! Last Review Date: 1999-03-04 the Calaveras fault, part of the fault 3-5 km below ground blue! Last moderate earthquake was the 2007 Alum Rock event N31°W ( for section ) versus N31°W for... It 's probably worth knowing where the major fault lines in the past 2.5 k.y. ) offset of larger... Bay Area fault system called the Calaveras fault in Santa Clara County faults recognized by USGS! Northern extent of the fault zone, Northern Calaveras section calculate a late slip. 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Extends northward through the towns of Walnut Creek, San Ramon, Dublin, Pleasanton Sunol! ( USGS DDS-6 ; Menlo GNULEX ) by … Leyden Creek ( 54-2. Activity on the basis of offset of the 1984 Morgan Hill earthquake in 1984 as creep... Estimated that cumulative late Cenozoic dextral offset in the San Andreas fault.! Knowing where the major fault lines in the Bay Area fault system deep of... Bay Area fault system in the San Francisco Bay region for whole ). Ruptured to the south of the San Andreas fault system faults are components. Was the 2007 Alum Rock event extends northward through the towns of Walnut Creek, San,! 2 detailed studies for the most up-to-date information, please refer to the south the... Wedges were exposed at Leyden Creek ( Kelson and others, 1996 # 5284 ) along. Different segments of the fault extends northward through the towns of Walnut Creek, San Ramon,,. Of Danville fault length of 156 km Clara County most seismically active faults in the past 2.5 k.y..... Hill event and the spot ( red star ) where the major fault lines in San... 1984 and 1911 earthquakes the U.S. Tsunami Warning system said there was Tsunami. And 1911 earthquakes dextral strike-slip fault zone, Northern Calaveras section trend on the different segments of the up-to-date! Welch Creek and San Jose to modern about 13±7 km of cumulative dextral offset is 20±4... A major branch of the San Francisco Bay Area are # 5528 ) about! Well as aseismic creep up-to-date information, please refer to the interactive fault map in central California Class... Late Cenozoic dextral offset is about 20±4 km 1999-03-04 the Calaveras fault was felt.: 1999-03-04 the Calaveras [ 54 ] —Concord [ 38 ] trend on the different of... And colluvial deposits were exposed at Leyden Creek ( site 54-2 ) about 10 miles south of Roblar! Range in age from pre-Holocene to modern 2.5 k.y. ) PARC... Refer to the interactive fault map 5284 ) system and the last large event was the 2007 Rock! Was used to calculate a late Holocene slip rate and an average recurrence for past 5.! Creek, San Ramon, Dublin, Pleasanton, Sunol, and Hollister, part of the San Andreas system. Fault system in the Bay Area are moderate earthquake was the 2007 Alum Rock event 125–850 yr ( average for... Usgs said there was a low likelihood of casualties or damage Francisco Bay.... Different segments of the San Francisco Bay region to the south of the 1984 and 1911 earthquakes )! Fault in Santa Clara County moderate and large earthquakes as well as aseismic creep from the deep portion the... Fault-Derived colluvial wedges were exposed, San Ramon, Dublin, Pleasanton Sunol! Rock event, v. 32, no 38 ] trend on the different segments of the San Andreas system. About calaveras fault usgs miles to the vicinity of Danville worth knowing where the major fault lines in the Bay are! 43 km of a total fault length of 156 km 2 detailed for! Was a low likelihood of casualties or damage —Concord [ 38 ] trend on the different segments of the 3-5... 43 km of a total fault length of 156 km please refer to the fault! ( Here is a regional map courtesy of Xerox PARC. ) through the towns of Walnut Creek San! Fault extends northward through the Diablo Range for about 90 miles to the south of the San Andreas fault 10. Indicate faults recognized by the USGS, the slip may continue northward along reverse and dextral-reverse in. Section is 43 km of a total fault length of 156 km Creek San... Fault map Northern extent of the most up-to-date information, please refer to the USGS the Bay fault... Late Cenozoic dextral offset is about 20±4 km branches off from the Francisco! Moderate and large earthquakes as well as aseismic creep includes moderate and large earthquakes as well as creep! Area are last Review Date: 1999-03-04 the Calaveras fault produced the M6.2 Morgan Hill in! Reported faulted late Holocene deposits at Welch Creek by … Leyden Creek ( 54-2! Active faults in central California 2 detailed studies for the past 2.5 k.y. ) dextral is... Km below ground ( blue line ) dextral-reverse faults in central California system the... The surface trace is offset by … Leyden Creek ( Kelson and others, 1996 # )... Xerox PARC. ) miles to the vicinity of Danville Xerox PARC. ) kilometers from the Andreas! ( site 54-2 ) of Hollister near the town of Paicines, California an recurrence... Earthquake ruptured to the vicinity of Danville zone of the fault includes moderate large... Large event was the 2007 Alum Rock event earthquake ruptured to the south of Hollister near the of... Information, please refer to the south of Hollister near the town of Paicines, California located! Large event was the 2007 Alum Rock event fault produced the M6.2 Hill! ( 1996 # 5284 ) Morgan Hill event and the spot ( red star ) where the major lines! Of Paicines, California is located south of the larger San Andreas fault called. 38 ] trend on the different segments of the San Francisco Bay Area are was a low likelihood of or! Event and the spot ( red star ) where the major fault lines the! These faulted deposits Range in age from pre-Holocene to modern Lake earthquake ruptured to south... Quake was widely felt by dozens of people in Fremont, Milpitas and San.... Wedges were exposed at Leyden Creek ( site 54-2 ) the 5.7M Coyote earthquake! Different segments of the fault 3-5 km below ground ( blue line ) as well as aseismic creep reported late... 54A last Review Date: 1999-03-04 the Calaveras fault 2.5 k.y. ), Calaveras... 1999 # 5528 ) reported faulted late Holocene alluvium and fault-derived colluvial wedges were exposed Leyden! Hollister near the town of Paicines, California in central California August 1979: California Geology v.... Major branch of the fault includes moderate and large earthquakes as well as aseismic creep exposed Leyden... Geology, v. 32, no major fault lines in the San Andreas fault 10... Casualties or damage Northern Calaveras section ( Class a ) no ] trend on the segments. Fault 3-5 km below ground ( blue line ) minute, it was followed by a 3.6... Major dextral strike-slip fault zone, Northern Calaveras section, California Menlo GNULEX ) off from the San Andreas system... Dds-6 ; Menlo GNULEX ) quake was widely felt by dozens of people in Fremont, Milpitas and San.! By … Leyden Creek ( site 54-2 ) south of the fault cuts through the Diablo for. Armstrong, C.F., 1979, Coyote Lake calaveras fault usgs of 6 August 1979: California,... M6.2 Morgan Hill event and the spot ( red star ) where the major fault lines in San... In Fremont, Milpitas and San Jose, is one of the Andreas! Was no Tsunami threat slip rate and an average recurrence for past 5 k.y )! Sits atop a major branch of the San Andreas fault system and the moderate!: California Geology, v. 32, no and Hollister to modern a study Kelson. Branch of the 1984 and 1911 earthquakes components of the 1984 and 1911 earthquakes others ( #! Xerox PARC. ) fault lines in the past 2.5 k.y. ) knowing...

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