首页|First-Arrival Picking Method for Active Source Data with Ocean Bottom Seismometers Based on Spatial Waveform Variation Characteristics

First-Arrival Picking Method for Active Source Data with Ocean Bottom Seismometers Based on Spatial Waveform Variation Characteristics

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The precision and reliability of first-arrival picking are crucial for determining the accuracy of geological structure in-version using active source ocean bottom seismometer(OBS)refraction data.Traditional methods for first-arrival picking based on sample points are characterized by theoretical errors,especially in low-sampling-frequency OBS data because the travel time of seismic waves is not an integer multiple of the sampling interval.In this paper,a first-arrival picking method that utilizes the spatial wave-form variation characteristics of active source OBS data is presented.First,the distribution law of theoretical error is examined;adjacent traces exhibit variation characteristics in their waveforms.Second,a label cross-correlation superposition method for extracting high-frequency signals is presented to enhance the first-arrival picking precision.Results from synthetic and field data verify that the pro-posed approach is robust,successfully overcomes the limitations of low sampling frequency,and achieves precise outcomes that are comparable with those of high-sampling-frequency data.

first-arrival pickingspatial waveform variationlabel cross-correlation superposition method

LIU Hongwei、XING Lei、ZHU Henghua、ZHANG Jin、ZHANG Jing、LIU Huaishan

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Key Laboratory of Submarine Geosciences and Prospecting Techniques,Ministry of Education,College of Marine Geosciences,Ocean University of China,Qingdao 266100,China

College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China

Laboratory for Marine Mineral Resources,Qingdao Marine Science and Technology Center,Qingdao 266071,China

Shandong Institute of Geological Survey,Jinan 250014,China

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Major Research Plan on West-Pacific Earth System Multispheric InteractionsMajor Research Plan on West-Pacific Earth System Multispheric InteractionsNational Natural Science Foundation of China(NSFC)Shiptime Sharing ProjectKey Research and Development Program of Shandong Province

9185821591958206419495812019GHY112019

2024

10.1007/s11802-024-5691-0

中国海洋大学学报(自然科学英文版)
中国海洋大学

中国海洋大学学报(自然科学英文版)

CSTPCD
影响因子：0.268
ISSN：1672-5182
年,卷(期)：2024.23(4)