[1]李 旺,马 达,张鸿滔,等.西藏定日县MS6.8地震云南地区gPhone重力仪同震响应特征分析[J].华南地震,2026,46(05):51-61.[doi:10.13512/j.hndz.2026.05.07]
　LI Wang,MA Da,ZHANG Hongtao,et al.Analysis of Co-Seismic Response Characteristics of gPhone Gravimeters in Yunnan to the Tingri MS6.8 Earthquake in Tibet[J].,2026,46(05):51-61.[doi:10.13512/j.hndz.2026.05.07]
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西藏定日县MS6.8地震云南地区gPhone重力仪同震响应特征分析()

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
46
期数:
2026年05期
页码:
51-61
栏目:
地震科学研究
出版日期:
2026-09-07

文章信息/Info

Title:
Analysis of Co-Seismic Response Characteristics of gPhone Gravimeters in Yunnan to the Tingri MS6.8 Earthquake in Tibet
文章编号:
1001-8662（2026）05-0051-11
作者:
李 旺; 马 达; 张鸿滔; 张 懿
云南省地震局，昆明 650224
Author(s):
LI Wang; MA Da; ZHANG Hongtao; ZHANG Yi
Yunnan Earthquake Agency, Kunming 650224, China
关键词:
定日地震; gPhone重力仪; 同震响应
Keywords:
Dingri earthquake;  gPhone gravimeter;  Co-seismic response
分类号:
P315.7
DOI:
10.13512/j.hndz.2026.05.07
文献标志码:
A
摘要:
不同震级和不同震中距的地震事件对连续重力仪的记录能力影响不同。收集了云南地区5个台站（昆明、迪庆、云龙、燕子岩、孟连）gPhone重力仪观测资料对定日MS6.8地震的同震响应特征，使用Tsoft软件进行预处理，探讨了到时、波形形态、振幅、持续时间等同震响应特征。结果表明：初波到时与震中距成正比；波形形态几乎相似，均呈现振荡型变化，且初动方向一致向下；震后固体潮曲线快速恢复，表明仪器具有良好的稳定性与一致性。gPhone重力仪观测到的同震响应初动方向可能与震源机制有关，同时受到方位角、距离控制，三者共同影响地震初波为拉张波，导致初动一致向下。不同台站仪器的同震响应幅度、响应持续时间区别不大。推测其可能由以下几个原因所致：五个台站震中距之间相差并不大，衰减不明显；云南地区构造复杂，各个台站之间地质结构状态不同；仪器本身灵敏度设置不同；个别台站时钟设置可能存在差异。研究通过分析定日MS6.8地震在云南地区的gPhone重力仪同震响应特征，揭示了远场地震波扰动下区域重力场的响应规律，该研究可为台站数据处理与分析提供参考。
Abstract:
The recording capabilities of continuous gravimeters are differently influenced by earthquakes of varying magnitudes and epicentral distances. This study examines the co-seismic response characteristics of the Dingri MS 6.8 earthquake recorded by gPhone gravimeters at five stations in Yunnan Province (Kunming, Diqing, Yunlong, Yanzian, and Menglian). Observational data were preprocessed using Tsoft software to analyze key features, includ‐ing arrival time, waveform morphology, amplitude, and duration. The main findings are as follows: The arrival time of initial wave is proportional to the epicentral distance; the recorded waveforms exhibit highly similar oscillatory patterns, all showing consistent downward initial motion; and the rapid recovery of the post-seismic tidal curves con‐firms the high stability and consistency of instruments. The observed downward initial motion in gPhone records may be related to the seismic source mechanism and is jointly controlled by azimuth, epicentral distance, and the generation of dilatational waves (which produce downward motion). Only minor variations in response amplitude and duration were observed among stations. Possible explanations for these limited differences include: relatively small variations in epicentral distances, leading to insignificant attenuation effects; heterogeneous geological structures re‐sulting from Yunnan's complex tectonic complexity; differences in instrument sensitivity settings; possible clock synchronization discrepancies at certain stations. By analyzing the co-seismic response of the Dingri MS 6.8 earth‐quake recorded in Yunnan, this study elucidates regional gravity field response patterns under far-field seismic dis‐turbances, and provides practical references for seismic data processing and analysis at monitoring stations.

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备注/Memo

备注/Memo:
收稿日期：2025-04-20
基金项目：中国地震局监测预报预警“三结合”课题（ CEA-SJH-202601056)
作者简介：李旺（1999-），男，工程师，主要从事地震监测预报研究。E-mail: 1986626299@qq.com
更新日期/Last Update: 2026-09-20