Analysis of Variation Characteristics of Near‑Fault Velocity Pulses and Source Effect in <italic style="font-style: italic">M</italic><sub>W</sub>7.8 and <italic style="font-style: italic">M</italic><sub>W</sub>7.5 Turkey Earthquake Sequence on February 6, 2023

DANG Zhiying; CAO Zelin; WANG Keyi; SUN Zhiyu

doi:10.13409/j.cnki.jdpme.20240417003

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Analysis of Variation Characteristics of Near‑Fault Velocity Pulses and Source Effect in M_W7.8 and M_W7.5 Turkey Earthquake Sequence on February 6, 2023

更新时间：2025-05-07

- Analysis of Variation Characteristics of Near‑Fault Velocity Pulses and Source Effect in M_W7.8 and M_W7.5 Turkey Earthquake Sequence on February 6, 2023
- Journal of Disaster Prevention and Mitigation Engineering Vol. 45, Issue 2, Pages: 338-348(2025)
- 作者机构：
  
  1.河北工程大学土木工程学院，河北邯郸 056038
  2.河北省地震灾害防御与风险评价重点实验室，河北三河 065201
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.20240417003
  CLC： P315.9
- Received：17 April 2024，
  
  Revised：2024-06-14，
  
  Published：28 April 2025
- 稿件说明：
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党志颖,曹泽林,王可意等.2023年2月6日土耳其M_W7.8和M_W7.5地震序列近断层速度脉冲变化特征及震源影响分析[J].防灾减灾工程学报,2025,45(02):338-348.

DANG Zhiying,CAO Zelin,WANG Keyi,et al.Analysis of Variation Characteristics of Near‑Fault Velocity Pulses and Source Effect in M_W7.8 and M_W7.5 Turkey Earthquake Sequence on February 6, 2023[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(02):338-348.
党志颖,曹泽林,王可意等.2023年2月6日土耳其M_W7.8和M_W7.5地震序列近断层速度脉冲变化特征及震源影响分析[J].防灾减灾工程学报,2025,45(02):338-348. DOI： 10.13409/j.cnki.jdpme.20240417003.

DANG Zhiying,CAO Zelin,WANG Keyi,et al.Analysis of Variation Characteristics of Near‑Fault Velocity Pulses and Source Effect in M_W7.8 and M_W7.5 Turkey Earthquake Sequence on February 6, 2023[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(02):338-348. DOI： 10.13409/j.cnki.jdpme.20240417003.

摘要

2023年2月6日土耳其东南部东安纳托利亚断裂带发生了

7.8和

7.5两次强烈地震，同一断裂带同日发生的两次大地震均观测到近断层速度大脉冲，本文研究了土耳其地震序列脉冲型地震动特性及震源影响特征。首先，收集了两次地震水平分量地震动观测记录，基于小波识别算法分别提取出28条和8条速度脉冲记录，分析了脉冲记录的空间分布特征以及速度脉冲周期、反应谱放大系数等参数变化特征，通过与脉冲参数经验关系式的比较，讨论土耳其地震的个体特性。然后，比较了两次地震在相同台站观测到的速度脉冲，从而探讨震源破裂过程对速度脉冲的影响。结果表明，两次地震的速度脉冲存在明显变化，脉冲周期因受震源复杂影响而明显区别于以往经验关系式，脉冲对反应谱的放大系数在1.8~7.5。脉冲记录台站大多位于邻近断层区域，脉冲周期随断层距呈增大趋势，震源错动分布对近断层速度脉冲特性具有显著影响。研究成果有助于深化理解近断层速度脉冲与震源关系，为近断层速度脉冲预测模型构建及

脉冲型地震动抗震输入提供科学参考。

Abstract

On February 6

2023

two strong earthquakes with magnitudes of

7.8 and

7.5 occurred along the East Anatolian Fault Zone in southeastern Turkey. Large near-fault velocity pulses were observed during both major earthquakes occurring on the same fault zone within one day. This study investigated the characteristics of pulse-type ground motions and the effects of the source of the Turkish earthquake sequence. First

horizontal-component ground motions recorded during the two earthquakes were collected

and 28 and 8 velocity pulse records were extracted

respectively

using a wavelet-based identification algorithm. The spatial distribution characteristics of the pulse records

as well as the variations in parameters such as velocity pulse period and response spectrum amplification factors

were analyzed. By comparing these results with empirical relationships for pulse parameters

the individual characteristics of the Turkish earthquakes were discussed. Subsequently

velocity pulses observed at the same stations during both earthquakes were compared to explore the effect of source rupture process on velocity pulses. The results showed significant variations in velocity pulses of the two earthquakes

with pulse periods notably differing from previous empirical relationships due to complex source effects. The response spectrum amplification factors by pulses ranged from 1.8 to 7.5. Most pulse-recording stations were located in areas adjacent to the fault

and pulse periods exhibited increasing trends with fault distance. Source slip distribution had a significant effect on the characteristics of near-fault velocity pulses. These findings contribute to a deeper understanding of the relationship between near-fault velocity pulses and source

providing scientific references for establishing prediction models for near-fault velocity pulses and determining seismic inputs for

pulse-type ground motions in earthquake-resistant engineering.

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references

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Analysis of Variation Characteristics of Near‑Fault Velocity Pulses and Source Effect in MW7.8 and MW7.5 Turkey Earthquake Sequence on February 6, 2023

DOI：10.13409/j.cnki.jdpme.20240417003

摘要

Abstract

关键词

Keywords

references

Analysis of Variation Characteristics of Near‑Fault Velocity Pulses and Source Effect in M_W7.8 and M_W7.5 Turkey Earthquake Sequence on February 6, 2023