福建省地震局,福建 福州 350003
张燕明(1993—),女,工程师,硕士。主要从事测震分析与地震自动编目方面的工作。E‑mail:674257016@qq.com
廖诗荣(1977—),男,正高级工程师。主要从事地震数据实时处理算法研究与软件系统研发。E-mail: liaoshirong@fjea.gov.cn
收稿:2023-11-29,
修回:2024-04-04,
纸质出版:2025-04-28
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张燕明,廖诗荣,陈惠芳等.RISP系统在2018年台湾海峡MS6.2地震序列中的应用研究[J].防灾减灾工程学报,2025,45(02):357-364.
ZHANG Yanming,LIAO Shirong,CHEN Huifang,et al.Application of RISP System to MS6.2 Taiwan Strait Earthquake Sequence in 2018[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(02):357-364.
张燕明,廖诗荣,陈惠芳等.RISP系统在2018年台湾海峡MS6.2地震序列中的应用研究[J].防灾减灾工程学报,2025,45(02):357-364. DOI: 10.13409/j.cnki.jdpme.20231129005.
ZHANG Yanming,LIAO Shirong,CHEN Huifang,et al.Application of RISP System to MS6.2 Taiwan Strait Earthquake Sequence in 2018[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(02):357-364. DOI: 10.13409/j.cnki.jdpme.20231129005.
为评估实时智能地震处理系统(RISP)对台网条件较差海域地震序列的处理能力,离线处理了2018年11月26日台湾海峡
M
S
6.2地震前后21天的连续波形数据,对比分析了自动处理结果与人工编目结果,定量评估了系统产出自动地震目录的完备性以及震源位置、震级大小、震相到时等信息的可靠性。系统共产出407条台湾海峡地震目录,与人工多台目录匹配93条,匹配率为100%;与人工单台目录匹配200条,匹配率为93.9%;其余114条地震目录均为人工漏分析的台湾海峡地震序列事件。匹配事件地震参数统计结果表明,发震时刻偏差小于1.0 s占比96.77%;震中位置偏差小于10 km占比100%;震源深度偏差小于10 km占比50.54%;震级偏差小于0.5占比98.92%。RISP系统可快速产出台湾海峡地震序列目录,目录完备性明显优于人工目录,地震参数的精度与人工目录相当。利用系统自动处理结果反演主震震源机制解,并对
M
L
≥3.0的地震进行精定位,认为台湾海峡
M
S
6.2地震发震构造可能为一条近东西向的隐伏断裂。RISP系统自动处理结果可用于快速判断发震断层,服务于地震预测预报、地震应急处置等工作。根据RISP系统产出地震序列分布特征以及主震震源机制解对于了解本次地震序列发震构造等研究具有重要意义。
To evaluate the performance of the Real-Time Intelligent Seismic Processing (RISP) system in processing earthquake sequences in marine areas with poor seismic station coverage
continuous waveform data for 21 days before and after the
M
S
6.2 earthquake in the Taiwan Strait on November 26
2018
were processed offline. A comparative analysis was conducted between the automated processing results and manual cataloging results. The comp
leteness of the automated earthquake catalogs generated by the system and the reliability of parameters
including hypocenter location
magnitude
and seismic phase arrival time
were quantitatively evaluated. A total of 407 earthquake catalogs were generated by the RISP system. Among these
93 matched the multi-station manual catalogs (100% matching rate)
and 200 matched the single-station manual catalogs (93.9% matching rate). The remaining 114 catalogs were events of the Taiwan Strait earthquake sequence that were undetected by manual cataloging. Statistical results of the matched events showed that 96.77% had origin time deviations less than 1.0 s
100% showed epicenter location deviations less than 10 km
50.54% had focal depth deviations less than 10 km
and 98.92% exhibited magnitude deviations less than 0.5. The RISP system could rapidly generate earthquake sequence catalogs for the Taiwan strait
with significantly better completeness than manual cataloging and comparable accuracy of seismic parameters to manual cataloging. Using the automated processing results
this study inverted the focal mechanism solution of the mainshock and performed precise relocation for earthquakes with
M
L
≥3.0. It was believed that the seismogenic structure of
M
S
6.2 Taiwan Strait earthquake was likely an east-west trending blind fault. The automated processing results of the RISP system enable rapid identification of seismogenic faults
providing support for earthquake prediction and forecasting
along with emergency response operations. The distribution characteristics of the earthquake sequence and the focal mechanism of the mainshock generated by the RISP are of great significance for understanding the seismogenic structure of this earthquake sequence.
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