Emergency Management News

Dynamics of the magma chamber beneath the slow-spreading Erta Ale Ridge using InSAR technique

19 July 2012

In November 2008, an eruption occurred in the Alu-Dalafilla volcanic centre that lies 30 km north of the lava lake, the eruption started on 3 November and eruptive activity peaked over a few hours and then waned exponentially until stopping on the night of 6 November 2008.

Based on a combined analysis of satellite images and seismicity, the surface deformation before, during and after the Alu-Dalafilla eruption has been studied using an extensive InSAR data set. This information has been used to provide the first evidence for a shallow (<2 km deep) elongated axial magma chamber at a subaerial slow-spreading segment and to determine its shallow crustal magmatic plumbing system and, for the first time, to observe the dynamic behaviour of an elongated axial magma chamber.

Read more

Menu Display