Journal
FRONTIERS IN EARTH SCIENCE
Volume 9, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/feart.2021.740505
Keywords
etna volcano; lava fountains; volcano monitoring; borehole strainmeters; eruption modeling
Categories
Funding
- Italian FIRB project Development of new technologies for the protection and defense of the territory fromnatural hazards (FUMO)
- PON project Development of research centers for the study of volcanic areas at high risk and their geothermal potential in the context of Mediterranean geological and environmental dynamic (VULCAMED)
- INGV
- Italian Presidenza del Consiglio dei Ministri Dipartimento della Protezione Civile (DPC), All. B2-WP2 -Task 9 Ottimizzazione dell'acquisizione dei segnali ad alta precisione degli strainmeter installati in pozzo sull'Etna (Optimization of the acquisiti
Ask authors/readers for more resources
A main challenge in open conduit volcanoes is to detect and interpret the ultra-small strain associated with eruptions such as lava fountains. Etna experienced a violent eruptive sequence of lava fountains two years after the flank eruption of December 2018, with significant strain changes recorded by a high-precision borehole dilatometer network. The strain signals provided useful information on the explosive efficiency and erupted volume, highlighting the importance of these tools in studying explosive eruptions in open conduit volcanoes.
A main challenge in open conduit volcanoes is to detect and interpret the ultra-small strain (<10(-6)) associated with minor but critical eruptions such as the lava fountains. Two years after the flank eruption of December 2018, Etna generated a violent and spectacular eruptive sequence of lava fountains. There were 23 episodes from December 13, 2020 to March 31, 2021, 17 of which in the brief period 16 February to 31 March with an intensified occurrence rate. The high-precision borehole dilatometer network recorded significant strain changes in the forerunning phase of December 2020 accompanying the final magma migration at the shallower levels, and also during the single lava fountains and during the entire sequence. The source modeling provided further information on the shallow plumbing system. Moreover, the strain signals also gave useful information both on the explosive efficiency of the lava fountains sequence and the estimate of erupted volume. The high precision borehole dilatometers confirm to be strategic and very useful tool, also to detect and interpret ultra-small strain changes associated with explosive eruptions, such as lava fountains, in open conduit volcanoes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available