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Spatially resolved SO2 flux emissions from Mt Etna
R D'Aleo1, M Bitetto1, D Delle Donne1
1DiSTeM Università di Palermo Palermo Italy.
Geophysical Research Letters
|October 25, 2016
Summary
A permanent UV camera network tracked sulfur dioxide (SO2) emissions from Mount Etna. This system revealed shifts in volcanic activity, aiding understanding of the volcano's shallow plumbing system.
Area of Science:
- Volcanology
- Geochemistry
- Remote Sensing
Background:
- Mount Etna is a persistently active volcano with complex eruptive behaviors.
- Understanding SO2 emissions is crucial for assessing volcanic hazards and plumbing systems.
Purpose of the Study:
- To systematically record SO2 flux emissions from individual vents of Etna volcano.
- To analyze shifts in volcanic activity using vent-resolved SO2 flux data.
- To contribute to the understanding of Etna's shallow plumbing system structure.
Main Methods:
- Deployment of a permanent UV camera network for SO2 flux monitoring.
- Systematic data collection during summer 2014, including eruptive episodes.
- Analysis of vent-resolved SO2 flux time series.
Main Results:
- The fissure eruption in Valle del Bove contributed approximately 50,000 tons of SO2 (~30% of total).
- A shift in degassing from the fissure vent to the New South East Crater (NSEC) was observed.
- Degassing onset at NSEC preceded explosive paroxysmal activity on August 11-15.
Conclusions:
- Vent-resolved SO2 flux monitoring effectively captures dynamic changes in volcanic activity.
- The study enhances comprehension of Etna's shallow plumbing system dynamics.
- SO2 flux data provides valuable insights into precursory signals for explosive eruptions.
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