利用PALSAR数据研究长白山火山活动性

Estimating the Magma Activity of the Changbaishan Volcano with PALSAR Data

利用200610～201103期间共24景ALOS卫星的PALSAR数据对长白山天池火山区的近年形变进行了研究,基于PSInSAR方法进行了数据处理,获取了长白山近年火山的时序形变场和形变速率结果。结果表明,长白山火山近年火山活动较弱,仅在火山口附近存在10mm/a的形变速率。同时利用Mogi模型对火山区的岩浆变化体积速率进行了反演,显示该区域的岩浆以～1×10^6m^3/a的速率补充。

A total of 24 scenes ALOS PALSAR satellite data between 2006-10 and 2011 03 were used to monitor the deformation for the Changbaishan volcano area; based on the PSInSAR approach for data processing, the time series and mean rate were obtained for deformation in the Changbaishan volcano region. These results show that the magma activity for the Changbaishan volcano was weak, since ionly near the crater there was there a 10 mm/a deformation rate. Based on the deformation results, a Mogi model was used to inverse the source parameters in volcanic area; the magma volume increased nearly 1 × 10^6 m^3/a.