| 台风“烟花”对江苏地区台基噪声自相关函数卓越周期的影响 |
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| 引用本文： | 杨驰,王俊,李正楷,朱峰.台风“烟花”对江苏地区台基噪声自相关函数卓越周期的影响[J].地震地磁观测与研究,2022,43(4):80-86. |
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| 作者姓名： | 杨驰 王俊 李正楷 朱峰 |
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| 作者单位： | 中国南京 210008 江苏省地震局 |
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| 基金项目： | 省级非天然地震事件信息专报产出平台研究（项目编号：202107147960） |
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| 摘 要： | 2021年第6号台风“烟花”是2021年度对江苏地区影响最强烈的台风。地震台站台基噪声是影响观测质量的关键因素，为了探究台风“烟花”对江苏地区地震台站台基噪声的影响，利用江苏地震台网2021年7月1日至8月3日记录的连续波形数据，通过计算波形自相关函数卓越周期与台基噪声水平的速度均方根有效振幅（RMS），研究其与台风参数之间的关系。结果表明：①在台风“烟花”初始发育阶段，卓越周期由平时的2—4 s逐步上升到4—7 s，随着台风影响范围逐渐向陆地转移，卓越周期缓慢降低，随着台风完全登陆并不断减弱，卓越周期又恢复到正常水平；②在台风“烟花”的整个进程中，绝大多数台站的RMS值变化幅度不超过正常值的15%，各台站RMS值变化幅度在正常波动范围内。
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| 关 键 词： | 台风 台基噪声 卓越周期 |
Influences of typhoon "Yanhua" on predominant period of autocorrelation function of seismic noise in Jiangsu Province |
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| YANG Chi,WANG Jun,LI Zhengkai,ZHU Feng.Influences of typhoon "Yanhua" on predominant period of autocorrelation function of seismic noise in Jiangsu Province[J].Seismological and Geomagnetic Observation and Research,2022,43(4):80-86. |
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| Authors: | YANG Chi WANG Jun LI Zhengkai ZHU Feng |
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| Institution: | Jiangsu Earthquake Agency, Nanjing 210008, China |
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| Abstract: | The No. 6 typhoon "Yanhua" in 2021 is the typhoon with the strongest impact on Jiangsu in 2021. Seismic noise is a key factor affecting the quality of seismic observations. In order to explore the impacts of typhoon "Yanhua" on seismic noise in Jiangsu area, we use the continuous waveform data of the Jiangsu seismic network from 30th July to 3rd August for the experiments and analysis. The relationship between the seismic noise and the typhoon parameters is studied by calculating the predominant period value of waveform autocorrelation function and the root mean square of the seismic noise effective amplitude value (RMS). The research showed that: ①In the initial development stage of typhoon "Yanhua", the predominant period gradually increased from the usual 3 s to 4-6 s. As the influence range of typhoon gradually shifted to the land, the predominant period slowly decreased. Finally, the typhoon completely landed and weakened, and the predominant period returned to the normal level; ② During the whole life cycle of the typhoon, the variation range of the RMS value of most stations did not exceed 15% of the normal value, and the variation range of the RMS value of each station is within the normal fluctuation range. |
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| Keywords: | typhoon seismic noise predominant period |
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