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    (A) Study of deformation around the Korea strait prior to Mw9.0 Tohoku earthquake

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    https://www.riss.kr/link?id=T15519339

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    On 11 March 2011, a great earthquake with magnitude 9.0 has occurred in Tohoku, Japan, more than 1,000 km from South Korea. In fact, seismicity rate in South Korea has increased since the 2011 Tohoku earthquake, although detailed evaluation of its effects on the Korean Peninsula remains incomplete. Now, the high precision space geodesy techniques play a key role in monitoring the crustal strain state and energy variation. This study attempts to evaluate crustal deformation around the Korean Strait after 2011 Tohoku earthquake through a detailed analysis recorded by GPS. Moreover, this study found a different fault characteristics in Japan affect the station displacement prior to GPS data observed among 2011 to 2012. After a year, the strain in Japan found in direction WNW-ESE, while in Korea found in direction WSW-ENE. This finding suggest the likelihood of the existence of a certain tectonic line between the southern part of Korea peninsula and Japan.
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    On 11 March 2011, a great earthquake with magnitude 9.0 has occurred in Tohoku, Japan, more than 1,000 km from South Korea. In fact, seismicity rate in South Korea has increased since the 2011 Tohoku earthquake, although detailed evaluation of its eff...

    On 11 March 2011, a great earthquake with magnitude 9.0 has occurred in Tohoku, Japan, more than 1,000 km from South Korea. In fact, seismicity rate in South Korea has increased since the 2011 Tohoku earthquake, although detailed evaluation of its effects on the Korean Peninsula remains incomplete. Now, the high precision space geodesy techniques play a key role in monitoring the crustal strain state and energy variation. This study attempts to evaluate crustal deformation around the Korean Strait after 2011 Tohoku earthquake through a detailed analysis recorded by GPS. Moreover, this study found a different fault characteristics in Japan affect the station displacement prior to GPS data observed among 2011 to 2012. After a year, the strain in Japan found in direction WNW-ESE, while in Korea found in direction WSW-ENE. This finding suggest the likelihood of the existence of a certain tectonic line between the southern part of Korea peninsula and Japan.

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    목차 (Table of Contents)

    • Chapter 1. INTRODUCTION 1
    • Chapter 2. PRINCIPLE OF GLOBAL POSITIONING SYSTEM AND STRAIN CALCULATION 3
    • 2.1. Operation Principle 3
    • 2.1.1 User Segment 4
    • 2.2. GPS Signals 4
    • Chapter 1. INTRODUCTION 1
    • Chapter 2. PRINCIPLE OF GLOBAL POSITIONING SYSTEM AND STRAIN CALCULATION 3
    • 2.1. Operation Principle 3
    • 2.1.1 User Segment 4
    • 2.2. GPS Signals 4
    • 2.3. GPS Observables 6
    • 2.4. GPS Error Sources 9
    • 2.4.1 Orbital Error 10
    • 2.4.2 Satellite and Receiver Clock Errors 10
    • 2.4.3 Tropospheric and Ionospheric Delays 11
    • 2.4.4 Receiver Noise 12
    • 2.4.5 Multipath 13
    • 2.5. Differential GPS 13
    • 2.5.1 Single Differencing 13
    • 2.5.2 Double Differencing 16
    • 2.6. Algorithm for Kinematic GPS 17
    • 2.6.1 Kalman Filter Algorithm 17
    • 2.6.2 Least Squares Algorithm 20
    • 2.7. GPS and Strain Analysis 22
    • 2.7.1 2-Dimensional Analysis 22
    • Chapter 3. RESULTS AND DISCUSSIONS 30
    • 3.1. Research Workflow and Study Area 30
    • 3.2. Time Series Analysis 32
    • 3.3. Horizontal Velocity 37
    • 3.4. Strain 39
    • Chapter 4. CONCLUSIONS 44
    • REFERENCES 45
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