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Poverty Ridge

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(a) The Poverty Ridge study area in the Diablo Mountains on the east side of the Santa Clara Valley, California. Locations of the two seismograph station lines (labeled 1 and 2) are shown within the rectangular box. Individual stations are indicated by triangles. Lines through the stations and a third line parallel to the ridge axis on its northeast side show the locations of topographic profiles in Figure 2. S1 and S2 are locations of two simulated earthquake sources. (b) A regional location map of the study area. (c) A location map of the closer earthquake sources to Poverty Ridge used in this study, with numerical labels from Table 2 for the events of special consideration. Events 8 and 22 lie off the map in the directions indicated by the arrows. The trend of epicenters follows the Calaveras fault. Station locations are indicated by plus symbols. The color version of this figure is available only in the electronic edition.
Published: 26 November 2013
Figure 1. (a) The Poverty Ridge study area in the Diablo Mountains on the east side of the Santa Clara Valley, California. Locations of the two seismograph station lines (labeled 1 and 2) are shown within the rectangular box. Individual stations are indicated by triangles. Lines through
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Model parameters for a 1D profile through the crest of Poverty Ridge, taken from the 3D velocity model used in the finite‐element simulation of ground motion.
Published: 26 November 2013
Figure 11. Model parameters for a 1D profile through the crest of Poverty Ridge, taken from the 3D velocity model used in the finite‐element simulation of ground motion.
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(a, b) HVSR as a function of position on Poverty Ridge, using 35 min of ambient noise for station lines 1 and 2, (c) HVSR as a function of position on Poverty Ridge, using 1 yr of ambient noise for station line 2, (d) comparison between earthquake based amplification spectra at the ridge crest station RDG23, using the reference site method, earthquake‐based spectra using the HVSR method, and the HVSR method using ambient noise. The color version of this figure is available only in the electronic edition.
Published: 26 November 2013
Figure 9. (a, b)  HVSR as a function of position on Poverty Ridge, using 35 min of ambient noise for station lines 1 and 2, (c)  HVSR as a function of position on Poverty Ridge, using 1 yr of ambient noise for station line 2, (d) comparison between earthquake based amplification spectra
Journal Article
Published: 26 November 2013
Bulletin of the Seismological Society of America (2014) 104 (1): 451–466.
...Figure 1. (a) The Poverty Ridge study area in the Diablo Mountains on the east side of the Santa Clara Valley, California. Locations of the two seismograph station lines (labeled 1 and 2) are shown within the rectangular box. Individual stations are indicated by triangles. Lines through...
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Azimuthal variability of site amplification. (a) Reference site spectral ratios and HVSR using the rms of the horizontal components of ground motion (rms) and the maximum spectrum of the horizontal components (max) (Shoja‐Taheri and Bolt, 1977). Event 10 is approximately in line with the major axis of Poverty Ridge, and event 22 is approximately perpendicular. See Figure 1c for the source locations. (b) The fundamental resonance peak near 1 Hz at station RDG23 is relative to reference site RDG21, using the rms of the horizontal components of ground motion. The resonance peak is minimized for sources perpendicular to the major axis of Poverty Ridge (230°). The color version of this figure is available only in the electronic edition.
Published: 26 November 2013
with the major axis of Poverty Ridge, and event 22 is approximately perpendicular. See Figure  1c for the source locations. (b) The fundamental resonance peak near 1 Hz at station RDG23 is relative to reference site RDG21, using the rms of the horizontal components of ground motion. The resonance peak
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Velocity waveforms for event 10 (Table 2) recorded at station line 2 (Fig. 2b). Horizontal components are rotated to 50° and 140° from north, or approximately perpendicular and parallel with the major trend of Poverty Ridge. Peak amplitudes are given in units of cm/s.
Published: 26 November 2013
Figure 4. Velocity waveforms for event 10 (Table  2 ) recorded at station line 2 (Fig.  2b ). Horizontal components are rotated to 50° and 140° from north, or approximately perpendicular and parallel with the major trend of Poverty Ridge. Peak amplitudes are given in units of cm/s.
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Earthquake ground‐motion directional response as a function of position on Poverty Ridge for station line 1. Spectra are calculated using the rms of the two horizontal components of ground motion and the reference site method relative to station RDG21. The amplification factor is given by the graded scale to the right of each frame. The color version of this figure is available only in the electronic edition.
Published: 26 November 2013
Figure 10. Earthquake ground‐motion directional response as a function of position on Poverty Ridge for station line 1. Spectra are calculated using the rms of the two horizontal components of ground motion and the reference site method relative to station RDG21. The amplification factor is given
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A finite‐element calculation of the maximum value of the vector sum of the two horizontal components of ground velocity plotted over the topography of Poverty Ridge for sources S1 and S2. See Figure 1a for the source locations. The view is from the northeast. Station locations are indicated by dots. All distance scales are in meters. The color version of this figure is available only in the electronic edition.
Published: 26 November 2013
Figure 12. A finite‐element calculation of the maximum value of the vector sum of the two horizontal components of ground velocity plotted over the topography of Poverty Ridge for sources S1 and S2. See Figure  1a for the source locations. The view is from the northeast. Station locations
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Earthquake‐based amplification spectra as a function of position on Poverty Ridge using (a) rms of horizontal components relative to the reference site RDG21 for station line 1, (b) rms of horizontal components relative to the reference site RDG21 for station line 2, and (c) HVSR for station line 2. See Table 2 and Figure 1c for information on earthquake locations. The color version of this figure is available only in the electronic edition.
Published: 26 November 2013
Figure 8. Earthquake‐based amplification spectra as a function of position on Poverty Ridge using (a) rms of horizontal components relative to the reference site RDG21 for station line 1, (b) rms of horizontal components relative to the reference site RDG21 for station line 2, and (c)  HVSR
Journal Article
Published: 01 April 2006
Environmental & Engineering Geoscience (2006) 12 (4): 301–314.
... slopes on all sides of the Poverty Hills ascend to an undulating, gently eastward-dipping plain 200–300 m above the Owens Valley floor ( Figure 2 ). Ridges and hillocks across the hills are rounded and mantled by soil with abundant rock fragments. Rock outcrops are generally scarce, except on the east...
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Journal Article
Published: 01 June 2023
Jour. Geol. Soc. India (2023) 99 (6): 743–746.
... not sustain in the rain-deficient plains of extra-peninsula and Peninsular India, rather proved unsustainable in many ways. By and large, the benefits of major irrigation projects, and poverty alleviation schemes did not reach the poor and rural population who constitute nearly 70% of country’s population...
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Journal Article
Published: 01 October 2012
Journal of Foraminiferal Research (2012) 42 (4): 305–326.
...Stephen J. Culver; Reanna L. Camp; John P. Walsh; Bruce W. Hayward; D. Reide Corbett; Clark R. Alexander Abstract ABSTRACT Foraminiferal assemblages were used to investigate the nature of sedimentation on the tectonically active Poverty continental margin (PCM) of New Zealand. Recent research...
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Journal Article
Journal: GSA Bulletin
Published: 01 November 2007
GSA Bulletin (2007) 119 (11-12): 1415–1432.
... and 10A ), is imprinted on the depositional record ca. 1.925, 1.5, and 0.575 ka. The earlier coseismic landsliding event also is recorded in Lake Tutira ( Eden and Page, 1998 ) and in alluvium and emergent beach ridges on the Poverty Bay Flats ( Pullar and Penhale, 1970 ; Pullar and Warren, 1968 ). All...
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Journal Article
Published: 01 March 2015
Jour. Geol. Soc. India (2015) 85 (3): 386–389.
... resurgence, led to the adoption of several measures such as construction of large reservoirs for irrigation and hydropower generation, soil conservation, various poverty alleviation programs like national drought prone area development, green revolution, technology missions with sustainable safe and pure...
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First thumbnail for: Tale of a Watershed: Vision for Tomorrow’s India
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Journal Article
Published: 01 October 2023
Jour. Geol. Soc. India (2023) 99 (10): 1478–1481.
..., the concept of integrated watershed management (IWSD) linked to environment and ecosystem conservation. This has received wide response from scientists, academicians and policy makers viewing and interpreting this concept in broader perspectives of ‘Green energy’ and ‘Poverty alleviation’ as relevant to UN’s...
Journal Article
Journal: Geology
Published: 28 October 2019
Geology (2020) 48 (1): 56–61.
... south to north with changes in subduction setting, including: wedge morphology, convergence rate, seafloor roughness, and sediment thickness on the incoming Pacific plate. Overall, focused seepage manifests most commonly above the deforming backstop, is common on thrust ridges, and is largely absent...
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Journal Article
Journal: Elements
Published: 01 October 2017
Elements (2017) 13 (5): 307–312.
... in poverty, illustrated by “Nearly 1 billion people taken out of extreme poverty in 20 years” ( The Economist 2013 ), there will be an inevitable increase in production of mineral commodities to meet the increased needs for a better quality of life. In response to the realisation that a secure supply...
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Journal Article
Published: 20 December 2016
Bulletin of the Seismological Society of America (2017) 107 (1): 344–358.
... a nearly flat response from 0.7 to 3.0 Hz, suggesting that its location experiences a continuum of resonances between these frequencies. This character is different from observations in Paper I for the nearby Poverty Ridge where a broader ridgetop was instrumented. The spectral peak between 2 and 3 Hz...
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Figure 1. (A) Map of major Quaternary faults in the northern Eastern California shear zone and southern and central Walker Lane, as well as the locations of the Owens Valley fault. Faults are modified from Reheis and Dixon (1996) and Wesnousky (2005). Faults (F) and fault zones (FZ): AHF—Anchorite Hills; HVF—Huntoon Valley; RF—Rattlesnake; EF—Excelsior; CF—Candelaria; CFS—Coaldale; MLF—Mono Lake; SLF—Silver Lake; HSF—Hartley Springs; HCF—Hilton Creek; RVF—Round Valley; IF—Independence; SNFF—Sierra Nevada frontal—WMFZ—White Mountain; OVFZ—Owens Valley; IMF—Inyo Mountains; S IMF—southern Inyo Mountains; DSF—Deep Springs; EVF—Eureka Valley; SV-HMFZ—Saline Valley–Hunter Mountain; EMF—Emigrant; PVFZ—Panamint Valley; FLVFZ—Fish Lake Valley; NDVFZ—northern Death Valley; FCFZ—Furnace Creek; BMFZ—Black Mountain; SDVFZ—southern Death Valley; LLFZ—Little Lake; AFZ; Argus; BWFZ—Black Water. (B) Generalized fault and geology map of south-central Owens Valley, showing the A.D. 1872 Owens Valley fault rupture and major fault zones in the valley (modified from Hollett et al. [1991] and Beanland and Clark [1994]). Abbreviations: OVFZ—Owens Valley fault zone from Vittori et al. (1993) and Beanland and Clark (1994); White Mountain fault zone (WMFZ), Sierra Nevada Frontal faults (SNFF), and northern and southern Inyo Mountains fault (N. and S. IMFZ) from Bacon et al. (2005), Centennial Flat fault (CCF) from A.S. Jayko (2006, personal commun.); Red Ridge fault (RRF) from Vittori et al. (1993); PH—Poverty Hills; CM—Crater Mountain.
Published: 01 July 2007
and Clark (1994) ; White Mountain fault zone (WMFZ), Sierra Nevada Frontal faults (SNFF), and northern and southern Inyo Mountains fault (N. and S. IMFZ) from Bacon et al. (2005) , Centennial Flat fault (CCF) from A.S. Jayko (2006, personal commun.); Red Ridge fault (RRF) from Vittori et al. (1993) ; PH
Journal Article
Published: 01 March 2009
Journal of Sedimentary Research (2009) 79 (3): 97–124.
... microcontinent. B) Arrangement of the major morphostructural elements of the Hikurangi subduction margin in the North Island, including the Hikurangi Trough, the imbricate frontal wedge emergent in the coastal ranges, the Neogene forearc basin domain, the axial ranges of the frontal ridge, the backarc basin...
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