中文摘要：

依据长白山天池火山区2002～2005年连续4期水准资料和GPS观测资料,分析了近年该地区的岩浆活动特征。结果显示：2002～2003年火山区垂直和水平形变变化明显,火山区GPS点位的活动性与绥阳基准站（距P00约350km）的差异性运动较大,火山区域性运动特征显著,表明在此期间火山区形变变化主要受岩浆活动的影响;2003年后水平和垂直形变变化速率逐渐减小,特别是2004～2005年,火山区GPS点位活动与绥阳点位的差异性运动变小,说明火山岩浆活动在逐渐减弱。

英文摘要：

On the basis of 4 period of level and GPS observations in Changbaishan-Tianchi volcano region during 2002 -2005, the present magma activity is analyzed. The results show that the deformation is obvious during 2002 -2003, the rates of the GPS sites in the volcanic region are considerably different from Suiyang station （350 km from P00）, it shows that the deformation is effected by magma activity mainly. After 2003, the vertical and horizontal deformation rates become small progressively, especially the rates of the GPS sites in the volcanic region are little different from Suiyang station during 2004 - 2005, it shows that the magma activity becomes weak gradually.