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-1 A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.
Deformation monitoring of Sakurajima Volcano based on SBAS-InSAR technique
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.
万方数据
维普
