河北红山台宽频带地震记录区域叠加研究

纪春玲; 张合; 董博; 马广庆

doi:10.11899/zzfy20230219

河北红山台宽频带地震记录区域叠加研究

doi: 10.11899/zzfy20230219

纪春玲^{1, 2,},
张合^{1, 2, ,},
董博^{1, 2},
马广庆^{1, 2}

1.
河北红山巨厚沉积与地震灾害国家野外科学观测研究站, 河北邢台 054000
2.
河北省地震局, 石家庄 050021

基金项目: 河北省重点研发计划项目（21375411D）；河北省地震科技星火计划攻关项目（DZ2021121700019）

详细信息

作者简介:
纪春玲，女，生于1987年。工程师。现从事地震监测预报工作。E-mail：279694644@qq.com

通讯作者:
张合，男，生于1979年。高级工程师。主要从事震害防御，地震应急。E-mail：13673161551@163.com

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出版历程
- 收稿日期: 2022-09-29
- 刊出日期: 2023-06-30

Research on Regional Stacking of Broadband Seismic Records at Hongshan Station in Hebei Province

Ji Chunling^{1, 2
,},
Zhang He^{1, 2
, ,},
Dong Bo^{1, 2},
Ma Guangqing^{1, 2}

1.
Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards, Xingtai 054000, Hebei, China
2.
Hebei Earthquake Agency, Shijiazhuang 050021, China

摘要

摘要: 可靠的震相走时是地震预警技术中精确测定震源位置和发震时刻的基础，本文运用STA/LTA震相识别技术，针对单台（河北红山台）2009—2021年共计12年积累的地震记录进行叠加计算，得到了红山台记录到的区域地震各震相走时曲线。结果显示，震中距0°～50°范围内红山台共成像7种震相的走时曲线，分别为P、S、PP、SS、PcS、ScS以及R面波震相，且随着组合参数变化，叠加成像的震相种类、震中距范围、清晰度均有所不同。此外，通过绘制各震相走时曲线发现，震中距0°～15°范围内，P波、S波及R波走时曲线基本呈线性变化，震中距0°～15°范围内计算得到红山台区域地震P波传播速度为7.5 km/s左右，S波传播速度为4.2 km/s左右，R波传播速度为3.5 km/s左右，介于P波和S波之间存在一个震相的走时痕迹，波速为5.4 km/s左右。本工作对于提升红山台震中距≤1000 km的地震预警定位精度有指导意义。
- 震相 /
- 叠加 /
- STA/LTA /
- 地震记录
Abstract: Reliable seismic phase travel time plays a fundamental role in the accurate determination of source position and occurrence time in earthquake early warning technology. In this paper, the STA/LTA phase identification technology is used for the first time to stack the seismic records accumulated by a single station (Hebei Hongshan station) for 12 years from 2009 to 2021, and the travel time curves of each seismic phase recorded by Hongshan station are imaged. The results show that the travel time curves of seven known seismic phases in Hongshan station are P, S, PP, SS, PcS, ScS, and R surface wave phases in the range of 0° to 50° epicenter distance. With the change of combination parameters, the types of seismic phases, epicentral distance range, and definition of superimposed imaging are different. In addition, by drawing the travel time curves of each seismic phase, it is found that the travel time curves of P wave, S wave, and R wave basically change linearly within the epicenter distance of 0° to 15°. Within the epicenter distance of 0° to15°, it is calculated that the seismic P-wave propagation velocity in Hongshantai area is about 7.5 km/s, S-wave propagation velocity is about 4.2 km/s and R-wave propagation velocity is about 3.5 km/s. There is a trace of seismic phase travel time between P wave and S wave, and the wave propagation velocity is about 5.4 km/s.
- Seismic phase /
- Superposition /
- STA / LTA /
- Seismic record

HTML全文

图 1 区域主要地震空间分布图（2009—2021）

Figure 1. Spatial distribution of regional main earthquakes （2009—2021）

下载: 全尺寸图片幻灯片

图 2 STA/LTA震相识别技术原理图

Figure 2. Schematic diagram of STA / LTA phase identification technology

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图 3 距红山台0°～50°范围内各数据集地震波形数统计

Figure 3. Statistics of seismic waveform number of each data set in the range of 0° to 50° from Hongshan station

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图 4 数据处理及计算过程

Figure 4. Data processing and calculation process

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图 5 参数组合1叠加计算结果及IASP91模型理论走时曲线

Figure 5. Superposition calculation results of parameter combination 1 and theoretical travel time curves of IASP91 model

下载: 全尺寸图片幻灯片

图 6 参数组合2叠加计算结果及IASP91模型理论走时曲线

Figure 6. Superposition calculation results of parameter combination 2 and theoretical travel time curves of IASP91 model

下载: 全尺寸图片幻灯片

图 7 参数组合3叠加计算结果及IASP91模型理论走时曲线

Figure 7. Superposition calculation results of parameter combination 3 and theoretical travel time curves of IASP91 model

下载: 全尺寸图片幻灯片

图 8 参数组合4叠加计算结果及IASP91模型理论走时曲线

Figure 8. Superposition calculation results of parameter combination 4 and theoretical travel time curves of IASP91 model

下载: 全尺寸图片幻灯片

图 9 参数组合1叠加计算结果（0°～20°）

Figure 9. Superposition calculation results of parameter combination 1（0°～20°）

下载: 全尺寸图片幻灯片

图 10 参数组合2叠加计算结果（0°～20°）

Figure 10. Superposition calculation results of parameter combination 2（0°～20°）

下载: 全尺寸图片幻灯片

图 11 参数组合3叠加计算结果（0°～20°）

Figure 11. Superposition calculation results of parameter combination 3（0°～20°）

下载: 全尺寸图片幻灯片

图 12 参数组合4叠加计算结果（0°～20°）

Figure 12. Superposition calculation results of parameter combination 4（0°～20°）

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表 1 数据处理参数组合

Table 1. Data processing parameter combination

组合序号滤波 STA/s LTA/s

1 高通0.5 Hz 1.0 9
2 高通0.167 Hz 2.0 20
3 低通0.1 Hz 3.0 30
4 低通0.033 Hz 4.5 45

下载: 导出CSV

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