P-wave first-motion polarity determination of waveform data in western Japan using deep learning [PDF]
Earth, Planets and Space, 2019 P-wave first-motion polarity is the most useful information in determining the focal mechanisms of earthquakes, particularly for smaller earthquakes.
Shota Hara +2 more
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Applied Sciences, 2023 P-wave first-motion polarity is important for the inversion of earthquake focal mechanism solutions. The focal mechanism solution can further contribute to our understanding of the source rupture process, the fault structure, and the regional stress ...
Shuai Li +5 more
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Acoustic emission features and P-wave first-motion polarity of tensile fractures in the rock
工程科学学报, 2022 To investigate the acoustic emission (AE) characteristics of tensile fracture in the rock, an AE experiment of granite, marble, and red sandstone using an expanding agent for fracture generation was designed.
Xi-ling LIU +4 more
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A Novel Time–Frequency Similarity Method for P-Wave First-Motion Polarity Detection [PDF]
SensorsP-wave first-motion polarity is a critical parameter for determining earthquake focal mechanisms. Extracting relative P-wave arrival times and polarity information using waveform cross-correlation techniques can enhance the accuracy of earthquake ...
Yanji Yao +4 more
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Study on the influence of the seafloor soft soil layer on seismic ground motion [PDF]
Natural Hazards and Earth System Sciences, 2021 In the complex medium system of the sea area, the overlying seawater and the surface soft soil have a significant impact on the seafloor ground motion, which brings great seismic risk to the safety of offshore-engineering structures.
J. Lan, J. Liu, X. Song
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Reliability of Focal Mechanism Solutions for Small and Medium Earthquakes Based on Different Methods
Taiyuan Ligong Daxue xuebao, 2022 Three representative small and medium earthquakes in Shanxi seismic belt in recent years were taken as examples. By using different methods, such as the first motion of P-wave, first motion of P-wave combining P/SV/SH amplitude ratio, CAP (Cut and Past),
Penghu GUAN +4 more
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Continuous prediction method of earthquake early warning magnitude for high-speed railway based on support vector machine [PDF]
Railway Sciences, 2022 Purpose – Using the strong motion data of K-net in Japan, the continuous magnitude prediction method based on support vector machine (SVM) was studied. Design/methodology/approach – In the range of 0.5–10.0 s after the P-wave arrival, the prediction time
Jindong Song, Jingbao Zhu, Shanyou Li
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Earthquake Science, 2023 In recent years, artificial intelligence technology has exhibited great potential in seismic signal recognition, setting off a new wave of research. Vast amounts of high-quality labeled data are required to develop and apply artificial intelligence in ...
Ming Zhao +3 more
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An Evolutionary Shaking‐Forecast‐Based Earthquake Early Warning Method
Earth and Space Science, 2023 Here we propose a methodology for Earthquake Early Warning (EEW) able to issue the alert based on the real‐time estimation of the epicentral area where a peak ground Intensity measure is expected to exceed a user‐set ground shaking level.
Aldo Zollo +3 more
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Numerical study of double-chambered perforated caisson with a top cover based on SPH method
Frontiers in Marine Science, 2023 The Smoothed Particle Hydrodynamics (SPH) method modified by Corrective Smoothed Particle Method (CSPM) and Riemann solution is employed to simulate the interaction between double-chambered perforated caissons and waves. The accuracy and applicability of
Xiaocheng Tang +5 more
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