Results 1 to 10 of about 14,278,833 (245)
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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CFM: a convolutional neural network for first-motion polarity classification of seismic records in volcanic and tectonic areas [PDF]
Frontiers in Earth Science, 2023 First-motion polarity determination is essential for deriving volcanic and tectonic earthquakes’ focal mechanisms, which provide crucial information about fault structures and stress fields. Manual procedures for polarity determination are time-consuming
Giovanni Messuti +7 more
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PolarCAP – A deep learning approach for first motion polarity classification of earthquake waveforms
Artificial Intelligence in Geosciences, 2022 The polarity of first P-wave arrivals plays a significant role in the effective determination of focal mechanisms specially for smaller earthquakes. Manual estimation of polarities is not only time-consuming but also prone to human errors.
Megha Chakraborty +6 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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Frontiers in Earth Science, 2023 Accurate P-wave first-motion-polarity (FMP) information can contribute to solving earthquake focal mechanisms, especially for small earthquakes, to which waveform-based methods are generally inapplicable due to the computationally expensive high ...
Ming Zhao +8 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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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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Stick‐Slip Tremor Beneath an Alpine Glacier
Geophysical Research Letters, 2021 Sliding of glacial ice over its base is typically described by a frictionless or slowly deforming bed. This view is challenged by recent seismic observations of stick‐slip motion at the ice‐bed interface.
J. Umlauft +6 more
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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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The role of photospheric converging motion in initiation of solar eruptions
Frontiers in Astronomy and Space Sciences, 2022 It is well-known that major solar eruptions are often produced by active regions with continual photospheric shearing and converging motions. Here, through high-accuracy magnetohydrodynamics simulation, we show how solar eruption is initiated in a single
Xinkai Bian +2 more
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