The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Philippe Jousset - One of the best experts on this subject based on the ideXlab platform.
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FAME: Fibre Optic Cables: an Alternative tool for Monitoring volcanic Events
2020Co-Authors: Philippe Jousset, Andy Clarke, Athena Chalari, Thomas Reinsch, Gilda Currenti, Rosalba Napoli, Charlotte Krawczyk, Michael Weber, Ivan Lokmer, Daniele PellegrinoAbstract:<p>In the framework of EUROVOLCs Trans-national grants, we propose the FAME project aiming at validating Distributed Acoustic Sensing (DAS) technology as a complementary and alternative tool for monitoring volcanic and seismic activity at Etna volcano. DAS technology provides records of strain signals with unprecedented spatial and temporal resolution.</p><p>We deployed a Fibre Optic Cable connected to an iDAS (Silixa) interrogator set-up at the Observatory Pizzi Deneri in the summit area. To allow for a continuously recording of the iDAS, a solar panel power system was designed using battery back-up and inverter to supply 200 W at 220 V/AC. An internet connection was set up for a full remote control capability. The iDAS interrogated a 1.5 km long Fibre Cable, buried at a depth of about 30 cm by digging a trench in Piano delle Concazze area. The DAS measurements were validated with conventional measurements from 26 broadband seismometers and 3 arrays of 3 infrasound sensors from the Geophysical Instrument Pool Potsdam (GIPP). We deployed instruments along the Fibre Optic Cable, covering an area of about 0.1 km2. The DAS and conventional sensors acquired data from 4 July to 23 September 2019 without major interruptions.</p><p>Here, we show key features of this the extraordinary multidisciplinary dataset. Thanks to the high spatial resolution (2 m), we could find locations of hypothesized faults in Piano delle Concazze area. Thanks to the long acquisition period, we continuously tracked Etna activity, marked by several eruptive episodes, including ash emissions, strombolian and effusive activities from the summit craters. The most intense and sustained eruptive events occurred in 18-20 July, 27-28 July and 9-13 September. We investigate the application of well-established analysis techniques in volcano-seismology to DAS dataset in order to assess the performance of the system in detecting and characterizing volcanic events.</p><p>Our findings demonstrate that DAS technology can record on a long term basis volcanic activity, which suggests DAS technology can be integrated to volcanic monitoring systems.</p>
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dynamic strain determination using Fibre Optic Cables allows imaging of seismological and structural features
Nature Communications, 2018Co-Authors: Philippe Jousset, Andy Clarke, Thomas Reinsch, Jan Henninges, Hanna Blanck, Michael Weber, T Ryberg, Rufat Aghayev, Gylfi Pall Hersir, Charlotte M KrawczykAbstract:Natural hazard prediction and efficient crust exploration require dense seismic observations both in time and space. Seismological techniques provide ground-motion data, whose accuracy depends on sensor characteristics and spatial distribution. Here we demonstrate that dynamic strain determination is possible with conventional Fibre-Optic Cables deployed for telecommunication. Extending recently distributed acoustic sensing (DAS) studies, we present high resolution spatially un-aliased broadband strain data. We recorded seismic signals from natural and man-made sources with 4-m spacing along a 15-km-long Fibre-Optic Cable layout on Reykjanes Peninsula, SW-Iceland. We identify with unprecedented resolution structural features such as normal faults and volcanic dykes in the Reykjanes Oblique Rift, allowing us to infer new dynamic fault processes. Conventional seismometer recordings, acquired simultaneously, validate the spectral amplitude DAS response between 0.1 and 100 Hz bandwidth. We suggest that the networks of Fibre-Optic telecommunication lines worldwide could be used as seismometers opening a new window for Earth hazard assessment and exploration.
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Crustal Exploration and Monitoring Seismic Events with a Fibre-Optic Cable Deployed at the Ground Surface in Iceland
EAGE DGG Workshop 2017, 2017Co-Authors: Philippe Jousset, Thomas Reinsch, Jan Henninges, Hanna Blanck, Trond RybergAbstract:We present new results of records from a 15 km long Fibre-Optic Cable deployed at the surface in Iceland. We estimate the quality of records of seismic events with the Cable for both exploration and monitoring.
Xu Jia-sheng - One of the best experts on this subject based on the ideXlab platform.
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Feasibility Study on Abandonment Schemes for China-Korea Submarine Fibre-Optic Cable System(West Section)
Coastal Engineering, 2006Co-Authors: Zhang Xiao-long, Xu Jia-shengAbstract:China-Korea submarine Fibre-Optic Cable system was declared to be abandoned in July 2005,and is the first abandoned international submarine Fibre-Optic Cable system in China.In this paper,the abandonment schemes for China-Korea submarine Fibre-Optic Cable system are analyzed,and the advantages,disadvantages and feasibilities of different abandonment schemes are studied.It is shown from the study results that the optimal abandonment scheme is to retrieve the entire submarine Cable in the Cable route area,the next feasible abandonment scheme is to retrieve the submarine Cable only in the territorial sea area,and the in-situ abandonment scheme is an inappropriate scheme for abandoning China-Korea submarine Cable system.
Athena Chalari - One of the best experts on this subject based on the ideXlab platform.
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Distributed Acoustic Sensing of Seismic Properties in a Borehole Drilled on a Fast-Flowing Greenlandic Outlet Glacier
Geophysical Research Letters, 2020Co-Authors: Adam Booth, Poul Christoffersen, Charlotte Schoonman, Andy Clarke, Bryn Hubbard, Robert Law, Samuel H. Doyle, Thomas R. Chudley, Athena ChalariAbstract:Distributed acoustic sensing (DAS) is a new technology in which seismic energy is recorded at high spatial and temporal resolution along a Fibre-Optic Cable. We show analyses from the first glaciol...
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FAME: Fibre Optic Cables: an Alternative tool for Monitoring volcanic Events
2020Co-Authors: Philippe Jousset, Andy Clarke, Athena Chalari, Thomas Reinsch, Gilda Currenti, Rosalba Napoli, Charlotte Krawczyk, Michael Weber, Ivan Lokmer, Daniele PellegrinoAbstract:<p>In the framework of EUROVOLCs Trans-national grants, we propose the FAME project aiming at validating Distributed Acoustic Sensing (DAS) technology as a complementary and alternative tool for monitoring volcanic and seismic activity at Etna volcano. DAS technology provides records of strain signals with unprecedented spatial and temporal resolution.</p><p>We deployed a Fibre Optic Cable connected to an iDAS (Silixa) interrogator set-up at the Observatory Pizzi Deneri in the summit area. To allow for a continuously recording of the iDAS, a solar panel power system was designed using battery back-up and inverter to supply 200 W at 220 V/AC. An internet connection was set up for a full remote control capability. The iDAS interrogated a 1.5 km long Fibre Cable, buried at a depth of about 30 cm by digging a trench in Piano delle Concazze area. The DAS measurements were validated with conventional measurements from 26 broadband seismometers and 3 arrays of 3 infrasound sensors from the Geophysical Instrument Pool Potsdam (GIPP). We deployed instruments along the Fibre Optic Cable, covering an area of about 0.1 km2. The DAS and conventional sensors acquired data from 4 July to 23 September 2019 without major interruptions.</p><p>Here, we show key features of this the extraordinary multidisciplinary dataset. Thanks to the high spatial resolution (2 m), we could find locations of hypothesized faults in Piano delle Concazze area. Thanks to the long acquisition period, we continuously tracked Etna activity, marked by several eruptive episodes, including ash emissions, strombolian and effusive activities from the summit craters. The most intense and sustained eruptive events occurred in 18-20 July, 27-28 July and 9-13 September. We investigate the application of well-established analysis techniques in volcano-seismology to DAS dataset in order to assess the performance of the system in detecting and characterizing volcanic events.</p><p>Our findings demonstrate that DAS technology can record on a long term basis volcanic activity, which suggests DAS technology can be integrated to volcanic monitoring systems.</p>
Andy Clarke - One of the best experts on this subject based on the ideXlab platform.
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Distributed Acoustic Sensing of Seismic Properties in a Borehole Drilled on a Fast-Flowing Greenlandic Outlet Glacier
Geophysical Research Letters, 2020Co-Authors: Adam Booth, Poul Christoffersen, Charlotte Schoonman, Andy Clarke, Bryn Hubbard, Robert Law, Samuel H. Doyle, Thomas R. Chudley, Athena ChalariAbstract:Distributed acoustic sensing (DAS) is a new technology in which seismic energy is recorded at high spatial and temporal resolution along a Fibre-Optic Cable. We show analyses from the first glaciol...
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FAME: Fibre Optic Cables: an Alternative tool for Monitoring volcanic Events
2020Co-Authors: Philippe Jousset, Andy Clarke, Athena Chalari, Thomas Reinsch, Gilda Currenti, Rosalba Napoli, Charlotte Krawczyk, Michael Weber, Ivan Lokmer, Daniele PellegrinoAbstract:<p>In the framework of EUROVOLCs Trans-national grants, we propose the FAME project aiming at validating Distributed Acoustic Sensing (DAS) technology as a complementary and alternative tool for monitoring volcanic and seismic activity at Etna volcano. DAS technology provides records of strain signals with unprecedented spatial and temporal resolution.</p><p>We deployed a Fibre Optic Cable connected to an iDAS (Silixa) interrogator set-up at the Observatory Pizzi Deneri in the summit area. To allow for a continuously recording of the iDAS, a solar panel power system was designed using battery back-up and inverter to supply 200 W at 220 V/AC. An internet connection was set up for a full remote control capability. The iDAS interrogated a 1.5 km long Fibre Cable, buried at a depth of about 30 cm by digging a trench in Piano delle Concazze area. The DAS measurements were validated with conventional measurements from 26 broadband seismometers and 3 arrays of 3 infrasound sensors from the Geophysical Instrument Pool Potsdam (GIPP). We deployed instruments along the Fibre Optic Cable, covering an area of about 0.1 km2. The DAS and conventional sensors acquired data from 4 July to 23 September 2019 without major interruptions.</p><p>Here, we show key features of this the extraordinary multidisciplinary dataset. Thanks to the high spatial resolution (2 m), we could find locations of hypothesized faults in Piano delle Concazze area. Thanks to the long acquisition period, we continuously tracked Etna activity, marked by several eruptive episodes, including ash emissions, strombolian and effusive activities from the summit craters. The most intense and sustained eruptive events occurred in 18-20 July, 27-28 July and 9-13 September. We investigate the application of well-established analysis techniques in volcano-seismology to DAS dataset in order to assess the performance of the system in detecting and characterizing volcanic events.</p><p>Our findings demonstrate that DAS technology can record on a long term basis volcanic activity, which suggests DAS technology can be integrated to volcanic monitoring systems.</p>
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dynamic strain determination using Fibre Optic Cables allows imaging of seismological and structural features
Nature Communications, 2018Co-Authors: Philippe Jousset, Andy Clarke, Thomas Reinsch, Jan Henninges, Hanna Blanck, Michael Weber, T Ryberg, Rufat Aghayev, Gylfi Pall Hersir, Charlotte M KrawczykAbstract:Natural hazard prediction and efficient crust exploration require dense seismic observations both in time and space. Seismological techniques provide ground-motion data, whose accuracy depends on sensor characteristics and spatial distribution. Here we demonstrate that dynamic strain determination is possible with conventional Fibre-Optic Cables deployed for telecommunication. Extending recently distributed acoustic sensing (DAS) studies, we present high resolution spatially un-aliased broadband strain data. We recorded seismic signals from natural and man-made sources with 4-m spacing along a 15-km-long Fibre-Optic Cable layout on Reykjanes Peninsula, SW-Iceland. We identify with unprecedented resolution structural features such as normal faults and volcanic dykes in the Reykjanes Oblique Rift, allowing us to infer new dynamic fault processes. Conventional seismometer recordings, acquired simultaneously, validate the spectral amplitude DAS response between 0.1 and 100 Hz bandwidth. We suggest that the networks of Fibre-Optic telecommunication lines worldwide could be used as seismometers opening a new window for Earth hazard assessment and exploration.
Dong Xiang-hua - One of the best experts on this subject based on the ideXlab platform.
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Analysis of Effect of Marine Route Survey on Submarine Fibre-Optic Cable Engineering
Coastal Engineering, 2007Co-Authors: Dong Xiang-huaAbstract:In this paper, the marine route survey factors, such as water depth, bottom slope, soil shearing strength, tidal current and thunderstorm and their roles in the submarine Fibre-Optic Cable engineering are introduced, and their roles and necessities in the Cable construction are also appraised, which will make the combination of marine route survey with construction demand closer and the marine route survey be aimed at the Cable engineering practice.