R. Escobar-Wolf

Under a Creative Commons license open access Previous Next Keywords Amplitude Interferometry La Palma Multi-temporal coherence SAR Volcanic emergency 1. Introduction There are more than 1331 volcanoes with activity suspected or confirmed during the last 10,000 years on our planet (Volcanoes of the World 4.11.1 updated 18/08/22, Global Volcanism Program, 2013). Approximately 800 million people live around 100 km from a volcano in 86 countries (Loughlin et al., 2015).

Although massive flank failure is fairly common in the evolution of volcanoes, measurements of flank movement indicative of instability are rare. Here, 3-D displacements from airborne radar amplitude images derived using an amplitude image pixel offset tracking technique show that the west and southwest flank of Pacaya Volcano in Guatemala experienced large (~4?m), discrete landsliding that was ultimately aborted.