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Paper title Sentinel-1 measurements of long term co-eruptive uplift at Sangay Volcano, Ecuador
Authors
  1. Pedro Alejandro Espín Bedón University of Leeds Speaker
  2. Susanna K. Ebmeier University of Leeds
  3. John Elliott COMET, University of Leeds
  4. Tim Wright COMET, University of Leeds
  5. Patricia Mothes Instituto Geofísico - Escuela Politécnica Nacional
  6. Daniel Andrade Instituto Geofisico - Escuela Politécnica Nacional
Form of presentation Poster
Topics
  • D1. Managing Risks
    • D1.01 Satellite EO for Geohazard Risks
Abstract text We present Sentinel-1 measurements of uplift at Sangay volcano, Ecuador, during its recent period of eruptive activity. This most recent eruptive episode began in May 2019 continues through December 2021, and is characterized by 1-10 km high ash plumes, lava flows of several km length, and pyroclastic flows emitting from the summit. The volcano is remote, surrounded by rainforest, limiting access to install ground-based monitoring stations. However, local communities are affected by (lahars, and ash) and distant populations have also been affected by the impact of volcanic ash (on infrastructure and air traffic). In Ecuador, Synthetic Aperture Radar Interferometry (InSAR) is an especially useful technique for monitoring large-scale surface deformation at remote volcanoes, and is an essential complement to ground-based instruments, providing constraints on magma locations and volumes.
We present Sentinel-1 and TerraSAR-X measurements at Sangay Volcano, Ecuador, spanning a period of intense eruption in September 2020. Sentinel-1 time series between August 2019 and September 2020 from 60 descending and 40 ascending images show persistent uplift through this period of eruption, reaching a maximum line-of-sight uplift of 70mm. We use weather models to mitigate atmospheric contributions to phase, and focus our analysis on two particularly large explosions on 08 June and on 19 September 2020. Our preliminary modelling is consistent with a deformation source steadily increasing in volume located within the volcano’s edifice