大地测量与地球动力学2025，Vol.45Issue(6)：605-609,632,6.DOI:10.14075/j.jgg.2024.06.300
基于InSAR与GNSS的长白山天池火山形变特征分析
Deformation Feature of Changbai Mountain Tianchi Volcano Based on InSAR and GNSS
摘要
Abstract
To study the surface deformation caused by the 2020 Changbai mountain Tianchi volcanic swarm event,GNSS data from the Tianchi volcanic area were processed,treating GNSS observation points as SBAS-InSAR orbit refinement points.The results from GNSS and SAR data processing were compared and analyzed to obtain the deformation velocity field of Changbai mountain Tianchi volcano.The results show that the deformation near the Tianchi volcanic crater is significant,characterized by expansion and uplift near the crater and slow subsidence in the surrounding areas.Before 2022,the Tianchi volcanic area experienced large-scale uplift,presumably due to the sudden large-scale move-ment of underground fluids.After 2022,the deformation and deformation rate at the volcanic crater decreased.Specifically,the surface uplift in the north and southeast directions of the Tianchi volcanic crater is more pronounced,while there is a small area of subsidence in the northeast direction.The maximum deformation rate in the northwest direction is-12 mm/a,and in the southeast direction,it is 6.9 mm/a.The results of trend analysis indicate that the eastern and southwestern parts of Tianchi volcano may continue to contract,and the expansion trends of the northern and southern slopes have weakened,with the overall deformation rate being 10 to 14 mm/a lower than before 2023.This sug-gests that after the swarm event,the overall volcanic activity is weakening.关键词
长白山/天池火山/InSAR/GNSS/形变Key words
Changbai mountain/Tianchi volcano/InSAR/GNSS/deformation分类
测绘与仪器引用本文复制引用
闫东晗,张羽,盘晓东,韩迪,徐丹,王子衿,贾琳..基于InSAR与GNSS的长白山天池火山形变特征分析[J].大地测量与地球动力学,2025,45(6):605-609,632,6.基金项目
国家自然科学基金(41861144025,20230203132SF) （41861144025,20230203132SF）
吉林长白山火山国家野外科学研究站基金(NORSCBS22-07). National Natural Science Foundation of China,No.41861144025,20230203132SF （NORSCBS22-07）
Jilin Changbai Mountain Volcano National Field Science Research Station Fund,No.NORSCBS22-07. （）
