Large‐scale inflation of Tungurahua volcano (Ecuador) revealed by Persistent Scatterers SAR interferometry
Large‐scale inflation of Tungurahua volcano (Ecuador) revealed by Persistent Scatterers SAR interferometry
复制标题
持久性散射体合成孔径雷达干涉测量揭示了通古拉瓦火山（厄瓜多尔）的大规模膨胀
DOI：
10.1002/2014gl060956
复制
发表时间：
2014
影响因子：
5.2
通讯作者：
H. Yepes
中科院分区：
文献类型：
--
作者：
J. Champenois;V. Pinel;S. Baize;L. Audin;H. Jomard;A. Hooper;A. Alvarado;H. Yepes
厄瓜多尔的通古拉瓦火山自1999年以来一直处于剧烈活动期，包括2006年和2008年的几次喷发。我们使用持续散射体方法来分析2003-2009年期间Envisat合成孔径雷达（SAR）数据的时间序列，以研究火山区域的地表变形。我们测量到一个连续的大尺度隆起，最大视线位移率约为8毫米/年，这是安第斯山脉一个包含多次喷发的活火山持续膨胀的第一个证据。我们将这一信号建模为岩浆位于海平面以下11.5公里的永久储存区，净流入率为700万立方米/年。2006年和2008年的火山爆发似乎并没有破坏这一长期信号。然而，我们在2006年喷发期间观察到明显的变形，这与450万立方米岩浆的额外侵入相一致。
The Tungurahua volcano, in Ecuador, has been experiencing a substantial activity period since 1999, with several eruptions, including those of 2006 and 2008. We use a persistent scatterers approach to analyze a time series of Envisat synthetic aperture radar (SAR) data over the period 2003–2009, to investigate surface deformation in the region of the volcano. We measure a continuous large‐scale uplift with a maximum line of sight displacement rate of about 8 mm/yr, which is the first evidence of a sustained inflation in the Andes for an active volcano encompassing several eruptions. We model this signal as magma emplacement in a permanent storage zone at 11.5 km below sea level, with a net inflow rate of 7 million m3/yr. The paroxysmal eruptions in 2006 and 2008 did not seem to disrupt this long‐term signal. However, we observe significant deformation during the 2006 eruption consistent with an additional intrusion of 4.5 million m3 of magma.
影响因子：
2.8
作者：
T. Walter;M. Motagh
通讯作者：
T. Walter;M. Motagh