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Journal Article

Seismic Evaluation of Unreinforced Masonry Structures with Flexible Diaphragms

Arturo Tena-Colunga, M.EERI
Published: 01 May 1992
Earthquake Spectra (1992) 8 (2): 305–318.
DOI: https://doi.org/10.1193/1.1585683
... static condensation. Soil-structure interaction effects can be easily incorporated in the method. The applicability of the method in the study of the dynamic response of a URM structure with flexible diaphragms is presented. The structure, an old firehouse located at Gilroy, California, has been...
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Journal Article

Seismic activity on the southern Calaveras Fault in central California

William H. Bakun
Published: 01 August 1980
Bulletin of the Seismological Society of America (1980) 70 (4): 1181–1197.
DOI: https://doi.org/10.1785/BSSA0700041181
... in the trace at the south end of Anderson Lake and along linear segments of the fault than near right-stepping offsets and bends in the trace and intersections of the Calaveras with other faults. Rupture expansion for the August 6, 1979 Coyote Lake sequence main shock, 10 km NNE of Gilroy, California...
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Journal Article

Creep on the Sargent Fault over the Past 50 Yr from Alignment Arrays with Implications for Slip Transfer between the Calaveras and San Andreas Faults, California

Daniel D. Mongovin, Belle Philibosian
Published: 29 June 2021
Bulletin of the Seismological Society of America (2021) 111 (6): 3189–3203.
DOI: https://doi.org/10.1785/0120210041
...Daniel D. Mongovin; Belle Philibosian ABSTRACT The 55‐km‐long Sargent fault connects the creeping Calaveras fault with the locked San Andreas fault through the Santa Cruz Mountains west of Gilroy, California. The position of the Sargent fault between these two faults may have implications for slip...
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View PDF for article title, Creep on the Sargent Fault over the Past 50 Yr from Alignment Arrays with Implications for Slip Transfer between the Calaveras and San Andreas Faults, <span class="search-highlight">California</span>
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Includes: Supplemental Content
Journal Article

Vertical axis rotations in the Mojave: Evidence from the Independence dike swarm: Comment and Reply

Keith A. Howard, R. Forrest Hopson, Hagai Ron, Amos Nur
Journal: Geology
Published: 01 November 1997
Geology (1997) 25 (11): 1051–1052.
DOI: https://doi.org/10.1130/0091-7613(1997)025<1051:VARITM>2.3.CO;2
View PDF for article title, Vertical axis rotations in the Mojave: Evidence from the Independence dike swarm: Comment and Reply
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Journal Article

Dynamic analysis of a slope failure from the 6 August 1979 Coyote Lake, California, earthquake

Raymond C. Wilson, David K. Keefer
Published: 01 June 1983
Bulletin of the Seismological Society of America (1983) 73 (3): 863–877.
DOI: https://doi.org/10.1785/BSSA0730030863
...Raymond C. Wilson; David K. Keefer abstract The Coyote Lake, California, earthquake of 6 August 1979 ( M L = 5.7) provided a rare opportunity to perform a dynamic numerical analysis of a seismically induced slope failure using actual strong-motion records. The earthquake displaced a preexisting...
View PDF for article title, Dynamic analysis of a slope failure from the 6 August 1979 Coyote Lake, <span class="search-highlight">California</span>, earthquake
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Journal Article

A seismic refraction study of the Santa Clara Valley and southern Santa Cruz Mountains, west-central California

Walter D. Mooney, James H. Luetgert
Published: 01 June 1982
Bulletin of the Seismological Society of America (1982) 72 (3): 901–909.
DOI: https://doi.org/10.1785/BSSA0720030901
...Walter D. Mooney; James H. Luetgert abstract Two seismic refraction profiles were recorded in the Santa Clara Valley region of central California to determine the upper crustal seismic velocity structure. A reversed, 8-km-long profile was recorded across the valley near Gilroy and an unreversed 38...
View PDF for article title, A seismic refraction study of the Santa Clara Valley and southern Santa Cruz Mountains, west-central <span class="search-highlight">California</span>
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Journal Article

Implications of upper Mesozoic conglomerate for suspect terrane in western California and adjacent areas

VICTOR M. SEIDERS, CHARLES D. BLOME
Journal: GSA Bulletin
Published: 01 March 1988
GSA Bulletin (1988) 100 (3): 374–391.
DOI: https://doi.org/10.1130/0016-7606(1988)100<0374:IOUMCF>2.3.CO;2
...- sedimentary-rock clasts derived from the western edge of the Sierra Nevada and transported westward by relatively small distribution systems. Conglomerate rich in chert and quartzite in suspect terrane of the Golden Gate-Gilroy and Nacimiento blocks of central California may have been deposited by a large...
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Journal Article

The Morgan Hill Earthquake of April 24, 1984—Strong-Motion Records

A. Gerald Brady, M.EERI, Anthony F. Shakal, M.EERI
Published: 01 May 1985
Earthquake Spectra (1985) 1 (3): 419–443.
DOI: https://doi.org/10.1193/1.1585274
...A. Gerald Brady, M.EERI; Anthony F. Shakal, M.EERI Seventy-two strong-motion accelerograph stations, mostly from within the permanent networks of the U. S. Geological Survey and the California Division of Mines and Geology, were triggered during the Morgan Hill earthquake, April 24, 1984. Among...
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Journal Article

Seismological notes

Published: 01 July 1944
Bulletin of the Seismological Society of America (1944) 34 (3): 175–177.
DOI: https://doi.org/10.1785/BSSA0340030175
.... A similar report was received from the Rosicrucian planetarium. Gilroy, California, March 15, 1944A small earthquake was recorded on the seismographs of the San Francisco Bay district at 1:15 A.M., P.W.T., March 15. The earthquake was moderate but of greater intensity than the shock recorded in that area...
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Image
Acceleration time histories recorded during (a) the 1995 Kobe, Japan, earthquake, north–south component of the Takarazuka record, together with a symmetric Ricker wavelet; (b) the 1979 Coyote Lake, California, earthquake, fault‐normal component of Gilroy Array 6 record, together with an antisymmetric Ricker wavelet; (c) the 1973 Lefkada, Greece, earthquake, Organization of Greek Telecommunications (OTE) record, together with a one‐cycle sine pulse.

Acceleration time histories recorded during (a) the 1995 Kobe, Japan, earth...

Published: 12 January 2016
Figure 4. Acceleration time histories recorded during (a) the 1995 Kobe, Japan, earthquake, north–south component of the Takarazuka record, together with a symmetric Ricker wavelet; (b) the 1979 Coyote Lake, California, earthquake, fault‐normal component of Gilroy Array 6 record, together
Image

Far-fault ground motion database used in this study ≠ Even...

Published: 01 November 2015
0.20 E7 Imperial Valley 1979 El Centro #13, Strobel Residence 6.9 D 230 0.14 E8 Imperial Valley 1979 Calexico, Fire Station 6.9 D 225 0.27 E9 Morgan Hill 1984 Gilroy, Gavilon College Phys. Sci. Bldg. 6.1 C 67 0.11 E10 Morgan Hill 1984 Gilroy #6, San Ysidro Microwave Site
Image
National Elevation Dataset (NED) shaded relief topography of the southern Santa Cruz Mountains overlain with Quaternary Fault and Fold Database (see Data and Resources) showing the location of the Sargent fault alignment arrays as well as the relative positions of the Sargent fault, San Andreas fault, and Calaveras fault. Inset of California with box showing location of the main figure. Focal mechanisms from the Northern California Earthquake Data Center labeled LPEQ, CLEQ, and GEQ indicate the epicenters of the 1989 Loma Prieta, 1979 Coyote Lake, and 2002 Gilroy earthquakes, respectively (see Data and Resources). Sargent fault creep rates are from this study; locations of alignment arrays and respective creep rates from Galehouse and Lienkaemper (2003) are shown with small black triangles. The color version of this figure is available only in the electronic edition.

National Elevation Dataset (NED) shaded relief topography of the southern S...

Published: 29 June 2021
, San Andreas fault, and Calaveras fault. Inset of California with box showing location of the main figure. Focal mechanisms from the Northern California Earthquake Data Center labeled LPEQ, CLEQ, and GEQ indicate the epicenters of the 1989 Loma Prieta, 1979 Coyote Lake, and 2002 Gilroy earthquakes
Journal Article

A Study of Possible Ground-Motion Amplification at the Coyote Lake Dam, California

David M. Boore, Vladimir M. Graizer, John C. Tinsley, Anthony F. Shakal
Published: 01 August 2004
Bulletin of the Seismological Society of America (2004) 94 (4): 1327–1342.
DOI: https://doi.org/10.1785/012003144
... 13 , 243 - 257 . Fumal , T. E. , J. F. Gibbs , and E. F. Roth ( 1987 ). Near-surface geology and seismic-wave velocities at six strong-motion stations near Gilroy, California , in The Morgan Hill, California, Earthquake of April 24, 1984 , Seena N. Hoose (Editor), U.S...
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View PDF for article title, A Study of Possible Ground-Motion Amplification at the Coyote Lake Dam, <span class="search-highlight">California</span>
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Journal Article

The attenuation of seismic shear waves in quaternary alluvium in Santa Clara Valley, California

James F. Gibbs, David M. Boore, William B. Joyner, Thomas E. Fumal
Published: 01 February 1994
Bulletin of the Seismological Society of America (1994) 84 (1): 76–90.
DOI: https://doi.org/10.1785/BSSA0840010076
... at Gilroy no. 2, S and P waves 76 The Attenuation of Seismic Shear Waves in Quaternary Alluvium in Santa Clara Valley, California 77 were recorded at 2.5-m intervals to a depth of 40 m and cm) ABS sewer pipe, and backfilled (between the casing then at every 5 m to a depth of 120 m. The overall method...
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Journal Article

The site response of two rock and soil station pairs to strong and weak ground motion

Robert B. Darragh, Anthony F. Shakal
Published: 01 October 1991
Bulletin of the Seismological Society of America (1991) 81 (5): 1885–1899.
DOI: https://doi.org/10.1785/BSSA0810051885
... A MONTEREY '~ BAY MONTEREY~ 56.5~02°-2.I.50a FIG. 2. A map of the central region of California showing the location of the Gilroy Array and the epicenters of the Loma Prieta, Morgan Hill, and Coyote Lake mainshocks. Gilroy #1 and Gilroy @2 (rock and stiff-soil sites, respectively) are located 2 km from each...
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Journal Article

Index to volume 23

Published: 01 October 1933
Bulletin of the Seismological Society of America (1933) 23 (4): 183–189.
DOI: https://doi.org/10.1785/BSSA0230040183
..., California 28 Denizli Province, Turkey 173 Dutch Harbor, Alaska 174 Etiwanda, California 27 Fall River, Massachusetts 35 Ferndale, California 27, 31 Florence, Washington 26 Fortson, Washington 28 Fortuna, California 28 (3), 83 French Guiana 135 Fresno, California 136 Gardena, California 130 Gilroy...
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Journal Article

The rupture mechanism of the Coyote Lake earthquake of 6 August 1979 inferred from near-field data

Michel Bouchon
Published: 01 June 1982
Bulletin of the Seismological Society of America (1982) 72 (3): 745–757.
DOI: https://doi.org/10.1785/BSSA0720030745
...Michel Bouchon abstract The Coyote Lake earthquake ( M L = 5.7) occurred within the dense network of seismic instruments of central California and was recorded by numerous accelerograph stations. Two of these stations, located within the fault zone itself, provide particularly remarkable records...
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Journal Article

Index to volume 34

Published: 01 October 1944
Bulletin of the Seismological Society of America (1944) 34 (4): 233–235.
DOI: https://doi.org/10.1785/BSSA0340040233
... 111 Filipstad, Sweden 109 Off Japan 231 Gerede, Turkey 110 Pacific Ocean, near New Zealand . . . . . . . 63 Gilroy, California 175 Pacific Ocean, near the Samoan I s l a n d s . . 63 Guatemala 63 Pacific Ocean, west of Colima, M e x i c o . . . 63 Guayaquil, Ecuador 66, 112 Pasadena, California 230...
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Journal Article

Probabilistic Seismic Hazard Analysis Considering Nonlinear Site Effect

Chu-Chuan Peter Tsai
Published: 01 February 2000
Bulletin of the Seismological Society of America (2000) 90 (1): 66–72.
DOI: https://doi.org/10.1785/0119980187
...Chu-Chuan Peter Tsai Abstract A modified method is proposed for the probabilistic seismic hazard analysis considering nonlinear site effect. A case study is presented to show the hazard curves that consider the nonlinearity of the soil layers at Gilroy #2. Source parameters and an earthquake...
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Journal Article

Northern California earthquakes, January 1 to December 31, 1937

Perry Byerly, John N. Adkins
Published: 01 October 1938
Bulletin of the Seismological Society of America (1938) 28 (4): 263–268.
DOI: https://doi.org/10.1785/BSSA0280040263
...Perry Byerly; John N. Adkins Copyright © 1938, by the Seismological Society of America * Manuscript received for publication October 7, 1938. NORTHERN CALIFORNIA EARTHQUAKES, JANUARY 1 TO DECEMBER 31, 1937" By PERRY BYERLY a n d JOHN N. ADKINS NORTHERN CALIFORNIAEARTHQUAKES...
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