The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform

Tomochika Tokunaga - One of the best experts on this subject based on the ideXlab platform.

  • Ultrahigh Resolution Fiber Bragg Grating Sensors for Quasi-Static Crustal Deformation Measurement
    Journal of Lightwave Technology, 2017
    Co-Authors: Zuyuan He, Jiageng Chen, Tomochika Tokunaga
    Abstract:

    Recently developed ultrahigh resolution optical fiber grating sensors provide powerful tools for Crustal Deformation monitoring thanks to their unique advantages such as high resolution, low cost, easy deployment, and capability of remote and multiplexed sensing. This paper reviews the development of several types of fiber-optic sensors with ultrahigh resolution in quasi-static domain, including a fiber Bragg grating sensor interrogated with a narrow-linewidth wavelength-sweeping laser, a fiber grating based Fabry-Perot interferometer sensor by using Pound-Drever-Hall technique, sensors interrogated with sideband interrogation method, and the realization of time division multiplexed ultrahigh resolution fiber sensors. The implementation of fiber grating sensors for in situ measurement of Crustal Deformation are also introduced.

  • sensing the earth Crustal Deformation with nano strain resolution fiber optic sensors
    Optics Express, 2015
    Co-Authors: Zuyuan He, Tomochika Tokunaga
    Abstract:

    Crustal Deformation measurement with a high resolution on the order of nano-strains in static to low frequency region is required for geophysical research. Optical fiber sensors are very attractive in this research field due to their unique advantages including high resolution, small size and easy deployment. In this paper, a fiber optic strain sensor with nano-strain-resolution and large measurement range for sensing the earth Crustal Deformation is reported. With this sensor the tide induced Crustal Deformation and the seismic wave were successfully recorded in field experiments.

  • Sensing the Earth Crustal Deformation with Nano-strain Resolution Fiber-optic Sensors
    Light Energy and the Environment, 2014
    Co-Authors: Zuyuan He, Tomochika Tokunaga
    Abstract:

    Recent development of fiber optic strain sensors with nano-strain-resolution and large measurement range for sensing the Earth Crustal Deformation is reviewed. In field experiment, tide induced Crustal Deformation and the seismic wave were successfully recorded.

  • Sensing the Earth Crustal Deformation with Fiber Optics
    Frontiers in Optics, 2013
    Co-Authors: Zuyuan He, Tomochika Tokunaga
    Abstract:

    Fiber optic strain sensors with nano-strain-resolution for sensing the Earth Crustal Deformation have been developed. With the sensors, oceanic tide induced Crustal Deformation and seismic wave were successfully recorded in field experiments.

  • Crustal Deformation measurement using an optical fiber strain sensor
    CLEO: 2013, 2013
    Co-Authors: Tomochika Tokunaga, Zuyuan He
    Abstract:

    We report an optical fiber strain sensor with ultra-high resolution, large measurement range and fast response for geophysical applications. Crustal Deformation caused by ocean tide and by seismic wave was successfully recorded in field experiments.

Mahmut Arikan - One of the best experts on this subject based on the ideXlab platform.

  • recent advances in sar interferometry time series analysis for measuring Crustal Deformation
    Tectonophysics, 2012
    Co-Authors: Andrew Hooper, David Bekaert, Karsten Spaans, Mahmut Arikan
    Abstract:

    Abstract Synthetic aperture radar (SAR) interferometry is a technique that permits remote detection of Deformation at the Earth's surface, and has been used extensively to measure displacements associated with earthquakes, volcanic activity and many other Crustal Deformation phenomena. Analysis of a time series of SAR images extends the area where interferometry can be successfully applied, and also allows detection of smaller displacements, through the reduction of error sources. Here, we review recent advances in time series SAR interferometry methods that further improve accuracy. This is particularly important when constraining displacements due to processes with low strain rates, such as interseismic Deformation. We include examples of improved algorithms applied to image Deformation associated with the 2010 eruption of Eyjafjallajokull volcano in Iceland, slow slip on the Guerrero subduction zone in Mexico, and tectonic Deformation in western Anatolia, Turkey.

  • Recent advances in SAR interferometry time series analysis for measuring Crustal Deformation
    Tectonophysics, 2012
    Co-Authors: Andrew Hooper, David Bekaert, Karsten Spaans, Mahmut Arikan
    Abstract:

    Synthetic aperture radar (SAR) interferometry is a technique that permits remote detection of Deformation at the Earth's surface, and has been used extensively to measure displacements associated with earthquakes, volcanic activity and many other Crustal Deformation phenomena. Analysis of a time series of SAR images extends the area where interferometry can be successfully applied, and also allows detection of smaller displacements, through the reduction of error sources. Here, we review recent advances in time series SAR interferometry methods that further improve accuracy. This is particularly important when constraining displacements due to processes with low strain rates, such as interseismic Deformation. We include examples of improved algorithms applied to image Deformation associated with the 2010 eruption of Eyjafjallajökull volcano in Iceland, slow slip on the Guerrero subduction zone in Mexico, and tectonic Deformation in western Anatolia, Turkey. © 2011 Elsevier B.V.

Zuyuan He - One of the best experts on this subject based on the ideXlab platform.

  • Ultrahigh Resolution Fiber Bragg Grating Sensors for Quasi-Static Crustal Deformation Measurement
    Journal of Lightwave Technology, 2017
    Co-Authors: Zuyuan He, Jiageng Chen, Tomochika Tokunaga
    Abstract:

    Recently developed ultrahigh resolution optical fiber grating sensors provide powerful tools for Crustal Deformation monitoring thanks to their unique advantages such as high resolution, low cost, easy deployment, and capability of remote and multiplexed sensing. This paper reviews the development of several types of fiber-optic sensors with ultrahigh resolution in quasi-static domain, including a fiber Bragg grating sensor interrogated with a narrow-linewidth wavelength-sweeping laser, a fiber grating based Fabry-Perot interferometer sensor by using Pound-Drever-Hall technique, sensors interrogated with sideband interrogation method, and the realization of time division multiplexed ultrahigh resolution fiber sensors. The implementation of fiber grating sensors for in situ measurement of Crustal Deformation are also introduced.

  • sensing the earth Crustal Deformation with nano strain resolution fiber optic sensors
    Optics Express, 2015
    Co-Authors: Zuyuan He, Tomochika Tokunaga
    Abstract:

    Crustal Deformation measurement with a high resolution on the order of nano-strains in static to low frequency region is required for geophysical research. Optical fiber sensors are very attractive in this research field due to their unique advantages including high resolution, small size and easy deployment. In this paper, a fiber optic strain sensor with nano-strain-resolution and large measurement range for sensing the earth Crustal Deformation is reported. With this sensor the tide induced Crustal Deformation and the seismic wave were successfully recorded in field experiments.

  • Sensing the Earth Crustal Deformation with Nano-strain Resolution Fiber-optic Sensors
    Light Energy and the Environment, 2014
    Co-Authors: Zuyuan He, Tomochika Tokunaga
    Abstract:

    Recent development of fiber optic strain sensors with nano-strain-resolution and large measurement range for sensing the Earth Crustal Deformation is reviewed. In field experiment, tide induced Crustal Deformation and the seismic wave were successfully recorded.

  • Sensing the Earth Crustal Deformation with Fiber Optics
    Frontiers in Optics, 2013
    Co-Authors: Zuyuan He, Tomochika Tokunaga
    Abstract:

    Fiber optic strain sensors with nano-strain-resolution for sensing the Earth Crustal Deformation have been developed. With the sensors, oceanic tide induced Crustal Deformation and seismic wave were successfully recorded in field experiments.

  • Crustal Deformation measurement using an optical fiber strain sensor
    CLEO: 2013, 2013
    Co-Authors: Tomochika Tokunaga, Zuyuan He
    Abstract:

    We report an optical fiber strain sensor with ultra-high resolution, large measurement range and fast response for geophysical applications. Crustal Deformation caused by ocean tide and by seismic wave was successfully recorded in field experiments.

Yuhang Li - One of the best experts on this subject based on the ideXlab platform.

  • Active Crustal Deformation in southeastern Tibetan Plateau: The kinematics and dynamics
    Earth and Planetary Science Letters, 2019
    Co-Authors: Yujiang Li, Yuhang Li, Lianwang Chen
    Abstract:

    Abstract Crustal Deformation in southeastern Tibetan Plateau has been attributed to tectonic extrusion and gravitational spreading. Here we analyzed the present-day strain partitioning in this region using GPS data. The results show highly localized shear strain along the Xianshuihe-Anninghe-Xiaojiang strike-slip faults, as expected by the model of tectonic extrusion. However, the localized shear strain along strike-slip faults ends in southern Yunnan and transfers to Crustal extension in Yunnan and contraction in Myanmar. We developed three-dimensional visco-elastoplastic finite element models to investigate the causes of the observed Crustal Deformation. Our results indicate that the present-day Crustal Deformation in southeastern Tibetan Plateau can be largely explained by gravitational spreading.

  • present day Crustal Deformation and strain transfer in northeastern tibetan plateau
    Earth and Planetary Science Letters, 2018
    Co-Authors: Yuhang Li, Qingliang Wang
    Abstract:

    Abstract The three-dimensional present-day Crustal Deformation and strain partitioning in northeastern Tibetan Plateau are analyzed using available GPS and precise leveling data. We used the multi-scale wavelet method to analyze strain rates, and the elastic block model to estimate slip rates on the major faults and internal strain within each block. Our results show that shear strain is strongly localized along major strike-slip faults, as expected in the tectonic extrusion model. However, extrusion ends and transfers to Crustal contraction near the eastern margin of the Tibetan Plateau. The strain transfer is abrupt along the Haiyuan Fault and diffusive along the East Kunlun Fault. Crustal contraction is spatially correlated with active uplifting. The present-day strain is concentrated along major fault zones; however, within many terranes bounded by these faults, intra-block strain is detectable. Terranes having high intra-block strain rates also show strong seismicity. On average the Ordos and Sichuan blocks show no intra-block strain, but localized strain on the southwestern corner of the Ordos block indicates tectonic encroachment.

Andrew Hooper - One of the best experts on this subject based on the ideXlab platform.

  • recent advances in sar interferometry time series analysis for measuring Crustal Deformation
    Tectonophysics, 2012
    Co-Authors: Andrew Hooper, David Bekaert, Karsten Spaans, Mahmut Arikan
    Abstract:

    Abstract Synthetic aperture radar (SAR) interferometry is a technique that permits remote detection of Deformation at the Earth's surface, and has been used extensively to measure displacements associated with earthquakes, volcanic activity and many other Crustal Deformation phenomena. Analysis of a time series of SAR images extends the area where interferometry can be successfully applied, and also allows detection of smaller displacements, through the reduction of error sources. Here, we review recent advances in time series SAR interferometry methods that further improve accuracy. This is particularly important when constraining displacements due to processes with low strain rates, such as interseismic Deformation. We include examples of improved algorithms applied to image Deformation associated with the 2010 eruption of Eyjafjallajokull volcano in Iceland, slow slip on the Guerrero subduction zone in Mexico, and tectonic Deformation in western Anatolia, Turkey.

  • Recent advances in SAR interferometry time series analysis for measuring Crustal Deformation
    Tectonophysics, 2012
    Co-Authors: Andrew Hooper, David Bekaert, Karsten Spaans, Mahmut Arikan
    Abstract:

    Synthetic aperture radar (SAR) interferometry is a technique that permits remote detection of Deformation at the Earth's surface, and has been used extensively to measure displacements associated with earthquakes, volcanic activity and many other Crustal Deformation phenomena. Analysis of a time series of SAR images extends the area where interferometry can be successfully applied, and also allows detection of smaller displacements, through the reduction of error sources. Here, we review recent advances in time series SAR interferometry methods that further improve accuracy. This is particularly important when constraining displacements due to processes with low strain rates, such as interseismic Deformation. We include examples of improved algorithms applied to image Deformation associated with the 2010 eruption of Eyjafjallajökull volcano in Iceland, slow slip on the Guerrero subduction zone in Mexico, and tectonic Deformation in western Anatolia, Turkey. © 2011 Elsevier B.V.