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世界地质 2024, 43(1) 102-108 DOI: ISSN: 1004-5589 CN: 22-1111/P

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	王琳炜
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基于 SBAS??InSAR 技术的樱岛火山形变监测

王琳炜, 张旭晴, 王凤艳, 陈峰, 都兵

吉林大学地球探测科学与技术学院, 长春 130026

摘要：火山喷发往往是由地壳内部岩浆活动引起的, 通过监测火山区地表形变可以有效反演出地下岩浆的状态? 为监测火山区地表形变, 笔者选取日本樱岛火山为研究区域, 采用 SBAS??InSAR 技术对 2019—2021 年间共计 75 景 Sentinel??1A 影像进行处理? 结果表明, 樱岛火山处于比较活跃的阶段, 监测期间樱岛火山总体处于沉降状态, 平均形变速率为 - 10. 05 mm/ a? 最大沉降区域为火山中心地带, 累积形变量为 - 62. 72 mm, 并且在时间上具有明显的季节变化特征; 抬升主要发生在火山外围区域, 其中最大抬升发生于樱岛东南侧, 监测期间累积抬升 108. 71 mm?

关键词：

Deformation monitoring of Sakurajima Volcano based on SBAS??InSAR technique

WANG Linwei, ZHANG Xuqing, WANG Fengyan, CHEN Feng, DU Bing

College of Geo??Exploration Science and Technology, Jilin University, Changchun 130026, China

Abstract: Volcanic eruptions are often triggered by magmatic activities within the Earth＇s crust. Monitoring the surface deformation in volcanic regions can effectively infer the state of underlying magma. To monitor the sur? face deformation of the volcanic areas, Sakurajima Volcano in Japan was selected for a detailed study. We applied the SBAS ??InSAR technique to process 75 Sentinel ??1A images from 2019 to 2021. The results show that Sakuraji? ma Volcano is in a relatively active phase, predominantly characterized by subsidence during the monitoring period, with an average deformation rate of - 10. 05 mm / a. The most significant subsidence was observed at the central zone of the volcano, amounting to a cumulative deformation of - 62. 72 mm. This area also exhibited pronounced seasonal variations. The uplift occurred mainly in the peripheral area of the volcano, with the maximum uplift oc? curring on the southeast side of Sakurajima, with a cumulative uplift of 108. 71 mm during the monitoring period.

Keywords: SBAS??InSAR Sakurajima Volcano deformation monitoring

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