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  • 1
    Keywords: China; volcanism; volcanic processes; volcanic fields; volcanic ash; volcanic groups; active volcanoes; magma; magmatic evolution
    Description / Table of Contents: 11 December 2020 --- Volcanic Processes and Magmatic Evolution of Tianchi Volcano, Changbaishan / Haiquan Wei, Bo Zhao, Zhengquan Chen and Hongmei Yu / Geological Society, London, Special Publications, 510, https://doi.org/10.1144/SP510-2020-83 --- 8 December 2020 --- A review of present-day deformation of active volcanoes in China during 1970–2013 / Lingyun Ji, Jiandong Xu, Lei Liu and Wenting Zhang / Geological Society, London, Special Publications, 510, https://doi.org/10.1144/SP510-2019-228 --- Olivine chemistry of the Quaternary Datong basalts of the Trans-North China Orogen: Insights into mantle source lithology and redox–hydration state / Lubing Hong, Zhang Yinhui, Le Zhang, Yi-Gang Xu, Zhe Liu and Pengli He / Geological Society, London, Special Publications, 510, https://doi.org/10.1144/SP510-2020-142 --- 7 December 2020 --- Volcanic geology and petrochemistry of Ashikule volcanic field in western Kunlun mountains of Tibetan plateau / Jiandong Xu, Bo Zhao, Hongmei Yu, Feixiang Wei and Zhengquan Chen / Geological Society, London, Special Publications, 510, https://doi.org/10.1144/SP510-2020-133 --- Eruption history, petrogeochemistry, and geodynamic background of Tengchong volcanoes in Yunnan Province, SW China / Hongmei Yu, Bo Zhao, Zhengquan Chen, Haiquan Wei, Wenjian Yang and Xiang Bai / Geological Society, London, Special Publications, 510, https://doi.org/10.1144/SP510-2020-45 --- The Cenozoic volcanic fields in northern Hainan Island and Leizhou Peninsula, South China: eruption history, magma source and dynamic background / Feixiang Wei, Wei Wei and Hongmei Yu / Geological Society, London, Special Publications, 510, https://doi.org/10.1144/SP510-2020-64 --- 4 December 2020 --- The Impact of Volcanic Ash on the Safety of Aviation Industry-Review of China’s Current Situation / Yiqiang Liang and Jiandong Xu / Geological Society, London, Special Publications, 510, https://doi.org/10.1144/SP510-2020-136 --- 2 December 2020 --- The Late Cenozoic Volcanic Groups in the South Daxing'anling, NE China: Geology, Geochemistry, and Chronology / Ni Li, Yong-Wei Zhao, Li-Wen Gong and Jia-Long Wang / Geological Society, London, Special Publications, 510, https://doi.org/10.1144/SP510-2020-28 --- Magma plumbing system and origin of the intraplate volcanoes in Mainland China: An overview of constraints from geophysical imaging / Weiqian Yu, Wei Wei, Feixiang Wei, Xiang Bai, Songjun Liu and Dan Xu / Geological Society, London, Special Publications, 510, https://doi.org/10.1144/SP510-2020-139 --- 1 December 2020 --- Volcanism in the Longgang Volcanic Field of Northeast China: Insights from eruption history, volcano types, and geochemical characteristics / Bo Zhao, Debin Xu, Zhida Bai and Zhengquan Chen / Geological Society, London, Special Publications, 510, https://doi.org/10.1144/SP510-2020-60
    Pages: Illustrationen, Diagramme, Karten
    Edition: online first
    Language: English
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  • 2
    Publication Date: 2019
    Description: Abstract We use GPS data to show synchronization between the 2011 and 2016 drought cycle in California, accelerated uplift of the Sierra Nevada Mountains, and enhanced magmatic inflation of the Long Valley Caldera (LVC) magmatic system. The drought period coincided with faster uplift rate, changes in gravity seen in the Gravity Recovery and Climate Experiment (GRACE), and changes in standardized relative climate dryness index. These observations together suggest that the Sierra Nevada elevation is sensitive to changes in hydrological loading conditions, which subsequently influences the LVC magmatic system. We use robust imaging of horizontal GPS velocities to derive time‐variable shear and dilatational strain rates in a region with highly variable station distribution. The results show that the highest strain rates are near the eastern margin of the Sierra Nevada and western edge of the Central Walker Lane (CWL) passing directly through LVC. The drought period saw geographic shifts in the distribution in active shear strain in the CWL more than 60 km from the LVC, delineating the minimum extent over which the active magmatic system affects the CWL tectonic environment. We analyze declustered seismicity data to show that locations with higher seismicity rates tend to be (1) areas with higher strain rates and (2) areas in which strain rates increased during drought‐enhanced inflation. We hypothesize that drought conditions reduce vertical surface mass loading, which decreases pressure at depth in the LVC system, in turn enhances magmatic inflation, and drives horizontal elastic stress changes that redistribute active CWL strain and modulate seismicity.
    Print ISSN: 2169-9313
    Electronic ISSN: 2169-9356
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 3
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    Conseil de l'Europe
    In:  Cahiers du Centre Européen de Géodynamique et de Séismologie, Luxembourg, Conseil de l'Europe, vol. 23, no. 50, pp. 131-136, pp. B05S07, (ISBN: 0534351875, 2nd edition)
    Publication Date: 2004
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Geodesy ; USA
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  • 4
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    In:  Geophys. Res. Lett., Warszawa, Elsevier, vol. 33, no. 11, pp. 1-4, pp. L11309, (ISBN: 0-12-018847-3)
    Publication Date: 2006
    Keywords: Detectors ; Magnitude ; Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Geodesy ; Early warning systems (earthquakes, volcanic eruptions, tsunamis etc.) ; Tsunami(s) ; GRL ; 1222 ; Geodesy ; and ; Gravity: ; Ocean ; monitoring ; with ; geodetic ; techniques ; 1240 ; Satellite ; geodesy: ; results ; 1241 ; Satellite ; geodesy: ; technical ; issues ; 4564 ; Oceanography: ; Physical: ; Tsunamis ; and ; storm ; surges ; 7215 ; Seismology: ; Earthquake ; source ; observations
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  • 5
    Publication Date: 2015-05-27
    Description: Real-time high-rate geodetic data have been shown to be useful for rapid earthquake response systems during medium to large events. The 2014 M w 6.1 Napa, California earthquake is important because it provides an opportunity to study an event at the lower threshold of what can be detected with GPS. We show the results of GPS-only earthquake source products such as peak ground displacement (PGD) magnitude scaling, centroid moment tensor (CMT) solution and static slip inversion. We also highlight the retrospective real-time combination of GPS and strong motion data to produce seismogeodetic waveforms that have higher precision and longer period information than GPS-only or seismic-only measurements of ground motion. We show their utility for rapid kinematic slip inversion and conclude that it would have been possible, with current real-time infrastructure, to determine the basic features of the earthquake source. We supplement the analysis with strong motion data collected close to the source to obtain an improved post-event image of the source process. The model reveals unilateral fast propagation of slip to the north of the hypocenter with a delayed onset of shallow slip. The source model suggests that the multiple strands of observed surface rupture are controlled by the shallow soft sediments of Napa Valley and do not necessarily represent the intersection of the main faulting surface and the free surface. We conclude that the main dislocation plane is westward dipping and should intersect the surface to the east, either where the easternmost strand of surface rupture is observed or at the location where the West Napa fault has been mapped in the past.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 6
    Publication Date: 2016-06-21
    Description: Near-global and continuous measurements from satellite altimetry have provided accurate estimates of global mean sea level in the past two decades. Extending these estimates further into the past is a challenge using the historical tide gauge records. Not only is sampling non-uniform in both space and time, tide gauges are also affected by vertical land motion (VLM) that creates a relative sea level change not representative of ocean variability. To allow for comparisons to the satellite altimetry estimated global mean sea level (GMSL), typically the tide gauges are corrected using glacial isostatic adjustment (GIA) models. This approach, however, does not correct other sources of VLM that remain in the tide gauge record. Here, we compare Global Positioning System (GPS) VLM estimates at the tide gauge locations to VLM estimates from GIA models, and assess the influence of non-GIA related VLM on GMSL estimates. We find that the tide gauges, on average, are experiencing positive VLM (i.e. uplift) after removing the known effect of GIA, resulting in an increase of 0.24 +/- 0.08 mm year −1 in GMSL trend estimates from 1900 to present when using GPS-based corrections. While this result is likely dependent on the subset of tide gauges used and the actual corrections used, it does suggest that non-GIA VLM plays a significant role in 20 th century estimates of GMSL. Given the relatively short GPS records used to obtain these VLM estimates, we also estimate the uncertainty in the GMSL trend that results from limited knowledge of non-GIA related VLM. This article is protected by copyright. All rights reserved.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 7
    Publication Date: 2016-05-28
    Description: Journal of the American Chemical Society DOI: 10.1021/jacs.6b01621
    Print ISSN: 0002-7863
    Electronic ISSN: 1520-5126
    Topics: Chemistry and Pharmacology
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  • 8
    Publication Date: 2015-07-07
    Description: Splice modulation therapy has shown great clinical promise in Duchenne muscular dystrophy, resulting in the production of dystrophin protein. Despite this, the relationship between restoring dystrophin to established dystrophic muscle and its ability to induce clinically relevant changes in muscle function is poorly understood. In order to robustly evaluate functional improvement, we used in situ protocols in the mdx mouse to measure muscle strength and resistance to eccentric contraction-induced damage. Here, we modelled the treatment of muscle with pre-existing dystrophic pathology using antisense oligonucleotides conjugated to a cell-penetrating peptide. We reveal that 15% homogeneous dystrophin expression is sufficient to protect against eccentric contraction-induced injury. In addition, we demonstrate a 〉40% increase in specific isometric force following repeated administrations. Strikingly, we show that changes in muscle strength are proportional to dystrophin expression levels. These data define the dystrophin restoration levels required to slow down or prevent disease progression and improve overall muscle function once a dystrophic environment has been established in the mdx mouse model.
    Print ISSN: 0964-6906
    Electronic ISSN: 1460-2083
    Topics: Biology , Medicine
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  • 9
    Publication Date: 2016-08-17
    Description: An onion-peeling technique is developed for inferring the emissivity profile of a stellarator plasma from a two-dimensional image acquired through a CCD or CMOS camera. Each pixel in the image is treated as an integral of emission along a particular line-of-sight. Additionally, the flux surfaces in the plasma are partitioned into discrete layers, each of which is assumed to have uniform emissivity. If the topology of the flux surfaces is known, this construction permits the development of a system of linear equations that can be solved for the emissivity of each layer. We present initial results of this method applied to wide-angle visible images of the Columbia Neutral Torus (CNT) stellarator plasma.
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
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  • 10
    Publication Date: 2015-05-17
    Description: Journal of the American Chemical Society DOI: 10.1021/jacs.5b00275
    Print ISSN: 0002-7863
    Electronic ISSN: 1520-5126
    Topics: Chemistry and Pharmacology
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