The 2005 eruption of Fernandina volcano, Galapagos, seen by InSAR
Falk Amelung(1) , Thomas Walter(1)
, and Sang-Ho Yun(2)
University of Miami,
4600 Rickenbacker Causeway,
Miami, Fl 33149,
(2) Stanford University, Dept of Geophysics, Stanford, California, United States
Fernandina volcano is a basaltic shield volcano in the Galapagos islands. It is the most active of the Galapagos volcanoes. It had an eruption from a radial dike in 1995. In 2005 a new eruption occurred presumably from a circumferential fissure.
In this talk we present InSAR data from the 2005 eruption. We present constraints about the geometry of the magmatic source and about the excess magma pressure in the volcanic plumbing system. We use stress change models to discuss the relation between the 1995 and the 2005 eruptions. In particular we address the question whether the location of the 1995 dike influenced the location of the 2005 eruption.