Historical earthquakes, tsunamis and real-time earthquake monitoring for tsunami advisory in the South China Sea region

Xu, Zhiguo; Liang, Shiming; Rahman, Mohd Nashriq Bin Abd; Li, Hongwei; Shi, Jianyu

doi:10.1007/s11069-021-04605-z

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…Field investigation shows that the shear failure is related to the existence of lamprophyre dike, and the rock mass failure is caused by significant geological shear dislocation. Seismic source mechanism analysis of engineering rock masses forms the foundation for monitoring and early warning systems in surrounding rock masses (Xu et al 2021). Currently, research is actively focused on unveiling the seismic source mechanism using moment tensor theory.…”

Section: Es/ep Analysis Of the Damaged Zonesmentioning

confidence: 99%

Excavation-induced damage zoning of the underground powerhouse with high geostress based on multiple monitoring methods

Xu,

Xiao,

et al. 2024

Environ Earth Sci

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The primary factor restricting the construction of deeply buried underground projects is the imprecise identification of the surrounding rock damage zone. This study examines the Shuangjiangkou underground powerhouse to investigate damage zoning in the surrounding rock mass. The temporal and spatial characteristics of deep rock mass deformation evolution are studied by multipoint extensometers, microseismic (MS) monitoring, acoustic wave testing and borehole TV. Subsequently, a quantitative analysis delineating damage zones is executed by evaluating alterations in displacement, wave velocity volatility, and the distribution of MS events within the surrounding rock mass. The excavation zone of the surrounding rock mass is segmented into distinct sectors: highly-damaged zones (HDZs), excavation-damaged zones (EDZs) and excavation-disturbed zones (EdZs). Additionally, the energy ratio of S-waves to P-waves (Es/Ep) and the moment tensor inversion (MTI) are introduced to reveal the failure mechanism of the surrounding rock mass in each damage zone. The results show that the rock mass fracture around the Shuangjiangkou underground powerhouse presents remarkable zonation characteristics. The spatial depth ranges for the HDZs, EDZs, and EdZs, determined quantitatively based on multivariate monitoring data, are 0-5 m, 5-10 m, and 10-20 m, respectively. The failure mechanisms of surrounding rock mass differ across various damage zones: the HDZ primarily exhibits tensile failure, while the EDZ is mainly characterized by shear failure. The research provides a valuable reference for evaluating the stability of surrounding rock during the excavation of underground caverns of Shuangjiangkou hydropower station.

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Section: Es/ep Analysis Of the Damaged Zonesmentioning

confidence: 99%

Excavation-induced damage zoning of the underground powerhouse with high geostress based on multiple monitoring methods

Xu,

Xiao,

et al. 2024

Environ Earth Sci

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“…Additionally, the SCS is in the convergence zone of the Pacific Plate, the Eurasian Plate, and the Indian Plate. Seismic activities are very frequent in this area [51][52][53]. As a result, there are many submarine landslides triggered by earthquakes in the SCS, especially in the Pearl River Mouth Basin (PRMB).…”

Section: Baiyun Landslide In the South China Seamentioning

confidence: 99%

Three-Dimensional Modeling of Tsunami Waves Triggered by Submarine Landslides Based on the Smoothed Particle Hydrodynamics Method

Dai,

Li,

Lan

2023

JMSE

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Submarine landslides are a global geohazard that can displace huge volumes of loose submarine sediment, thereby triggering enormous tsunami waves and causing a serious threat to coastal cities. To investigate the generation of submarine landslide tsunamis, a three-dimensional numerical model based on the smoothed particle hydrodynamics (SPH) method is presented in this work. The model is first validated through the simulation of two underwater landslide model tests, and is then applied to simulate the movement of the Baiyun landslide in the South China Sea (SCS). The kinetics features of the submarine landslide, including the sliding velocity and runout distance, are obtained from the SPH simulation. The tsunami waves generated by the Baiyun landslide are predicted. In addition, sensitivity analyses are conducted to investigate the impact of landslide volume and water depth on the amplitude of the tsunami waves. The results indicate that the amplitude of tsunami waves triggered by submarine landslides increases with the landslide volume and decreases with the water depth of the landslide.

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Island-based GNSS-IR network for tsunami detecting and warning

Li,

Qiu,

et al. 2024

Coastal Engineering

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Historical earthquakes, tsunamis and real-time earthquake monitoring for tsunami advisory in the South China Sea region

Cited by 7 publications

References 44 publications

Excavation-induced damage zoning of the underground powerhouse with high geostress based on multiple monitoring methods

Excavation-induced damage zoning of the underground powerhouse with high geostress based on multiple monitoring methods

Three-Dimensional Modeling of Tsunami Waves Triggered by Submarine Landslides Based on the Smoothed Particle Hydrodynamics Method

Island-based GNSS-IR network for tsunami detecting and warning

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