Widespread uplift and ‘trapdoor’ faulting on Galápagos volcanoes observed with radar interferometry

  title={Widespread uplift and ‘trapdoor’ faulting on Gal{\'a}pagos volcanoes observed with radar interferometry},
  author={Falk Amelung and Sigurjón Jónsson and Howard A. Zebker and Paul Segall},
Volcanic uplift, caused by the accumulation of magma in subsurface reservoirs, is a common precursor to eruptions. But, for some volcanoes, uplift of metres or more has not yet led to an eruption. Here we present displacement maps of volcanoes in the Galápagos Islands, constructed using satellite radar interferometry, that might help explain this dichotomy. We show that all but one of the seven volcanoes on the islands of Isabela and Fernandina deformed during 1992–99. Cerro Azul and Fernandina… 

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