Catalog of earthquakes along the San Andreas Fault system in central California, October-December 1973

Lester, F.W.; Kirkman, Sharon L.; Meagher, K.L.

doi:10.3133/ofr76732

Cited by 9 publications

(5 citation statements)

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“…1). These 1971 boundaries lie within enlarged perimeters given for later years (Lester et al 1976, and earlier reports), but to ensure uniformity, we use the smaller region. The earthquakes within these boundaries are uniformly well located, i.e.…”

Section: Thecataloguesmentioning

confidence: 99%

“…This product is essentially uniform over distances from 1 km to more than 20 km. For distances less than 1 km the hypocentre distribution is dominated by Iocation errors; independent estimates of these errors are approximately 1 km, (Lee et al 1971;Lester et al 1976).…”

Section: Xor Imentioning

confidence: 99%

“…In this paper we extend, with some modifications, the investigations made with the Duda catalogue to three available catalogues of California earthquakes: Southern California (Allen e l al. 1965; Hileman, Allen & Nordquist 1973), Northern California (Bolt & Miller 1971, 1975 and Central California (Lee, Eaton & Brabb 1971;Lester, Kirkman & Meagher 1976 which also has references to earlier reports). These catalogues contain many thousands of earthquakes and are probably the best documented, most complete, and most accurate catalogues now in existence.…”

Section: Introductionmentioning

confidence: 96%

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Statistical study of the occurrence of shallow earthquakes

Kagan

Knopoff

1978

Geophysical Journal International

166

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The time-space-magnitude interaction of shallow earthquakes has been investigated for three catalogues: worldwide (M > 7.0), Southern and Northern California (A4 2 4.0) and Central California (A4 2 1 S). The earthquake sequences are considered as a multi-dimensional stochastic point process; the estimates of the parameters for a branching model of the seismic process are obtained by a maximum-likelihood procedure. After applying magnitude-time and magnitude-distance scaling, the pattern of relationship among earthquakes of different magnitude ranges is almost identical. The number of foreshocks diminishes as the magnitude difference between the main shock and the foreshocks increases, while the magnitude distribution of aftershocks has the opposite property. The strongest aftershocks are likely to occur at the beginning of the sequence; later they migrate away with velocities of the order of km/day. The sequences which are composed of smaller aftershocks last longer and there are indications that they remain essentially in the focal region. Foreshocks also appear to migrate, but in this case, toward the main shock. The rate of occurrence of dependent shocks increases as t -' as the origin time of the main shock is approached, effectively making every earthquake a multi-shock event. This interaction of earthquakes was modelled by a Monte-Carlo simulation technique. The statistical inversion of simulated catalogues was undertaken to derive the information we would be able t o retrieve from actual data, as well as possible errors of estimates. The possibility of using these results as a tool for seismic risk prediction is discussed and evaluated.

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Section: Thecataloguesmentioning

confidence: 99%

Section: Xor Imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Statistical study of the occurrence of shallow earthquakes

Kagan

Knopoff

1978

Geophysical Journal International

166

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“…Reservoir was studied by Radbruch-Hall (1968;197*0. In addition, the National Center for Earthquake Research in cooperation with the Atomic Energy Commission has plotted earthquake epicenters along active faults in westcentral California (see Lester et al, 1976).…”

Section: Previous Investigationsmentioning

confidence: 99%

Distribution and petrology of the Anderson-Coyote Reservoir volcanic rocks

Nakata¹

1981

Open-File Report

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“…The evolution of that network north of San Francisco Bay is shown in figure 68. Data-analysis procedures are described by Lester, Kirkman, and Meagher (1976). Preliminary epicenters of earthquakes located by the network are shown in figure 69; most of the earthquakes shown were located in 1975-78 after the network had expanded north to Clear Lake.…”

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confidence: 99%

Research in the Geysers-Clear Lake geothermal area, northern California

McLaughlin¹,

Donnelly‐Nolan²

1981

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DE82 905361 COVER View southeastward at geothermal development in the Geysers steam field. Large steam plumes rise from condensing towers of numerous electrical powerplants: smaller plumes rise from geothermal wellheads. Northwest-flowing Big Sulphur Creek has excavated the canyon that transects the photograph from upper right to lower left. Hydrothermal leakage from the steam reservoir occurs dong faults that cut rocks of the Franciscan assemblage along the northeast side of Big Sulphur Creek canyon. The altered rocks are prone to extensive landslides, many of which are visible here. Prominent flat-topped peak on the central horizon is Cobb Mountain, a 1.1-million year-old silicic volcanic center of the Clear Lake Volcanics. . RESEARCH IN THE GEOTHERMAL=, NORTHERN CALIFORNIA GEYSERS-C-LAKE Landsat image of a part of northwestern California, showing Clear Lake in the center, Lake Berryessa to the southeast, Suisun Bay still farther south (lower right corner), and the Pacific Ocean to the west. Agricultural development in the western Sacramento Valley is visible northeast of Clear Lake. Two smaller closed valleys, visible west of Clear Lake, that are dined along a northwestward trend are Little Lake Valley to the northwest and Ukiah Valley with Lake Mendocino on the southeast.. The present area of geothermal development in the Geysers steam field is encircled. Northwest-trending hogback ridges, composed of late Mesozoic sedimentary rocks of the Sacramento Valley that mark the west side of the Great Valley physiographic province,contrast with the more heterogeneous intricately dissected terrane of the Coast Range province to the west. Sutter Buttes, a center of late Cenozoic volcanism in the center of Sacramento Valley, is visible in the upper right corner. Along the southwest coast can be seen the rift of the San Andreas fault, trending southeast from Point Arena and passing through Bodega Head and Tomales Bay in the lower part of the photograph.

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Catalog of earthquakes along the San Andreas Fault system in central California, October-December 1973

Cited by 9 publications

References 0 publications

Statistical study of the occurrence of shallow earthquakes

Statistical study of the occurrence of shallow earthquakes

Distribution and petrology of the Anderson-Coyote Reservoir volcanic rocks

Research in the Geysers-Clear Lake geothermal area, northern California

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