Summary: 'Scientists have collaborated to analyze the inner workings of Bolivia's 'zombie' volcano, Uturuncu. By combining seismology, physics models and analysis of rock composition, researchers identify the causes of Uturuncu's unrest, alleviating fears of an imminent eruption.'
they also mention this
"Uturuncu sits above the world's largest known magma body in the Earth's crust, the Altiplano-Puna Volcanic Complex"
and then they hedge there bets with "The research team believe that this is the most likely cause for the deformation in the centre of the volcanic system"