Space‐geodetic evidence for multiple magma reservoirs and subvolcanic lateral intrusions at Fernandina Volcano, Galápagos Islands

Research using InSAR data reveals Fernandina Volcano, Galápagos Islands, possesses multiple magma reservoirs and subvolcanic lateral intrusions. The study identifies two persistent magma storage zones beneath the summit and southern flank: a flat-topped reservoir at approximately 1.1 km below sea level and an oblate-spheroid cavity at around 4.9 km below sea level, both hydraulically connected. Additionally, it provides the first geodetic evidence for lateral intrusions in December 2006 and August 2007, potentially explaining historical volcanic events like the 1927 uplift at Punta Espinoza and the 1968 caldera collapse without significant eruption. The findings align with previous geodetic and petrological studies.

Bagnardi, M., & Amelung, F. (2012). Space‐geodetic evidence for multiple magma reservoirs and subvolcanic lateral intrusions at Fernandina Volcano, Galápagos Islands. Journal of Geophysical Research: Solid Earth, 117(B10). Portico. https://doi.org/10.1029/2012jb009465