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Flank sliding: A valve and a sentinel for paroxysmal eruptions and magma ascent at Mount Etna, Italy

Geology, ISSN: 1943-2682, Vol: 48, Issue: 11, Page: 1077-1082
2020
  • 15
    Citations
  • 0
    Usage
  • 16
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    15
    • Citation Indexes
      15
  • Captures
    16

Article Description

Rising magma, dike intrusions, and flank collapse are observed at many volcanoes world-wide, but how they interact is still poorly documented. Extensive synthetic aperture radar interferometry and continuous global positioning system observations captured a sharp dike intrusion at Mount Etna, Italy, during the 2018 paroxysm that triggered a vigorous seaward sliding of the eastern flank connected with brittle failure and deep magmatic resourcing. We propose a feedback process between flank acceleration and magma intrusion that derives from the interaction between the long- and short-term deformation of the volcano. The flank sliding acts as a valve that modulates the emplacement and eruption of magma within the shallow system. Rapid flank acceleration could potentially evolve into sudden collapses and seismic release at shallow depth. In turn, flank slip events could act as a sentinel for changes in magma depth and paroxysmal eruptions at Mount Etna.

Bibliographic Details

Giuseppe Pezzo; Cristiano Tolomei; Pasquale De Gori; Claudio Chiarabba; Mimmo Palano; Stefano Calcaterra; Piera Gambino

Geological Society of America

Earth and Planetary Sciences

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