基于短周期地震观测的远震中频面波相速度提取

doi:10.13209/j.0479-8023.2025.083

北京大学学报（自然科学版） ›› 2025, Vol. 61 ›› Issue (5): 915-924.DOI: 10.13209/j.0479-8023.2025.083

基于短周期地震观测的远震中频面波相速度提取

温景充¹, 王敬香¹, 赵志远², 宁杰远^1,†, 吕国军^2,†, 韩晓飞^3,†

1. 北京大学地球与空间科学学院, 深地探测与矿产勘查全国重点实验室, 北京 100871 2. 河北省地震局, 石家庄 050021 3. 山西省地震局, 太原 030021

收稿日期:2024-11-12 修回日期:2025-08-30 出版日期:2025-09-20 发布日期:2025-09-20
通讯作者: 宁杰远, E-mail: njy(at)pku.edu.cn, 吕国军, E-mail: 13483188538(at)163.com, 韩晓飞, E-mail: 38094048(at)qq.com
基金资助:
深地国家科技重大专项(2024ZD1001100)、河北省重点研发计划社会公共事业创新专项(22375406D)、河北省地震科技星火计划项目(DZ2021110500002)和山西省震灾风险防治中心委托项目“晋中市活断层探测深部地震构造环境分析”资助

Extracting Teleseismic Mid-frequency Surface Wave Phase Velocity Based on Short-Period Seismic Observations

WEN Jingchong¹, WANG Jingxiang¹, ZHAO Zhiyuan², NING Jieyuan^1,†, LÜ Guojun^2.†, HAN Xiaofei^3,†

1. State Key Laboratory of Deep Earth and Mineral Exploration, School of Earth and Space Sciences, Peking University, Beijing 100871 2. Earthquake Administration of Hebei Province, Shijiazhuang 050021 3. Earthquake Administration of Shanxi Province, Taiyuan 030021

Received:2024-11-12 Revised:2025-08-30 Online:2025-09-20 Published:2025-09-20
Contact: NING Jieyuan, E-mail: njy(at)pku.edu.cn, LÜ Guojun, E-mail: 13483188538(at)163.com, HAN Xiaofei, E-mail: 38094048(at)qq.com

摘要/Abstract

摘要：

将远震面波双台法应用于山西省晋中市短周期地震仪组成的超密集台阵。对远震记录进行滤波和仪器响应校正后, 提取出中频(5~15 s)面波信号, 通过筛选, 获取其中信噪比高的记录, 从Z分量截取瑞利波震相后, 获得台站对的平均频散曲线, 并反演S波速度结构。结果表明, 通过滤波及不同仪器间的仪器响应校正, 可以从短周期地震仪的记录中提取出中频瑞利面波相速度; 尽管观测时间短, 但反演得到的S波速度结构与当地断裂构造符合较好, 说明短周期地震仪提取的中频地震信号可用于远震面波地下结构的反演。

关键词: 短周期地震仪, 远震面波, 双台法, 相速度

Abstract:

The teleseismic surface wave two-station method was applied to an ultra-dense array of short-period seismometers in Jinzhong City, Shanxi Province. After the teleseismic records were filtered and corrected for instrument responses, mid-frequency (5–15 s) surface wave signals were extracted. High signal-to-noise ratio records were selected through screening. The Rayleigh wave phases were extracted from the Z component, and average dispersion curves for station pairs were obtained. The S-wave velocity structure was subsequently inverted. The results demonstrate that appropriate filtering and cross-instrument response correction enable the extraction of mid-frequency Rayleigh wave phase velocities from short-period seismometer recordings. Although the observation period is extremely limited, the inverted S-wave velocity structure aligns well with local fault tectonics. This confirms that mid-frequency seismic signals derived from short-period instruments are viable for subsurface inversion via teleseismic surface waves.

Key words: short-period seismometer, teleseismic surface wave, two-station method, phase velocity

温景充, 王敬香, 赵志远, 宁杰远, 吕国军, 韩晓飞. 基于短周期地震观测的远震中频面波相速度提取[J]. 北京大学学报（自然科学版）, 2025, 61(5): 915-924.

WEN Jingchong, WANG Jingxiang, ZHAO Zhiyuan, NING Jieyuan, LÜ Guojun, HAN Xiaofei. Extracting Teleseismic Mid-frequency Surface Wave Phase Velocity Based on Short-Period Seismic Observations[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2025, 61(5): 915-924.

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链接本文: https://xbna.pku.edu.cn/CN/10.13209/j.0479-8023.2025.083

https://xbna.pku.edu.cn/CN/Y2025/V61/I5/915

基于短周期地震观测的远震中频面波相速度提取

Extracting Teleseismic Mid-frequency Surface Wave Phase Velocity Based on Short-Period Seismic Observations

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