'Failed' eruptions revealed by pattern classification analysis of gas emission and volcanic tremor data at Mt. Etna, Italy

Falsaperla, S.; Behncke, B.; Langer, H.; Neri, M.; Salerno, G.; Giammanco, S.; Pecora, E.; Biale, E.
January 2014
International Journal of Earth Sciences;Jan2014, Vol. 103 Issue 1, p297
Academic Journal
During the spring of 2007, paroxysmal activity occurred at the Southeast Crater of Mt. Etna, always associated with sharp rises in the amplitude of the volcanic tremor. Activity ranged from strong Strombolian explosions to lava fountains coupled with copious emission of lava flows and tephra. During inter-eruptive periods, recurrent seismic unrest episodes were observed in the form of temporary enhancements of the volcanic tremor amplitude, but they did not culminate in eruptive activity. Here, we present the results of an analysis of these inter-eruptive periods by integrating seismic volcanic tremor, in-soil radon, plume SO flux, and thermal data. SO flux and thermal radiation are envisaged as the 'smoking gun,' and certifying that changes in seismic or radon data can be considered as volcanogenic. Short-term changes were investigated by pattern classification based on Kohonen maps and fuzzy clustering on volcanic tremor, radon, and ambient parameters (pressure and temperature). Our results unveil 'failed' eruptions between February and April 2007 that are explained as ascending magma batches, which triggered repeated episodes of gas pulses and rock fracturing, but that failed to reach the surface.


Related Articles

  • Iceland.  // AirGuide Online.com;4/5/2010, p5 

    The article reports on the claim of officials that the opening of a second fissure and constant lava flow are not putting tourists who seek the glimpse of a volcanic eruption in Iceland.

  • MOUNT HOOD TIMELINE.  // Oregon Business Magazine;Jun2011, Vol. 34 Issue 6, p40 

    The article reports on the important years for Mount Hood, Oregon. It reports that the region's volcanic eruption sends mudflows down the mountain and leaves the lava dome known as Crater Rock in 1781. The mountain was first seen by the white explorers in 1792 and a British naval officer,...

  • Hawaiian fissure fountains 1: decoding deposits-episode 1 of the 1969-1974 Mauna Ulu eruption. Parcheta, C.; Houghton, B.; Swanson, D. // Bulletin of Volcanology;Sep2012, Vol. 74 Issue 7, p1729 

    Deposits from episode 1 of the 1969-1974 Mauna Ulu eruption of KÄ«lauea provide an exceptional opportunity to study processes of low intensity Hawaiian fissure fountains. Episode 1 lava flows passed through dense forest that had little impact on flow dynamics; in contrast, the pattern of...

  • Geological map of Mount Etna West Rift (Italy). Bellotti, Fernando; Branca, Stefano; Groppelli, Gianluca // Journal of Maps;2010, p96 

    Mt Etna (3340 m a.s.l.) is the most active volcano in Europe, with more than 500 ka of geological history. In this work, a detailed structural and geological field survey of its West Rift was performed at 1:10,000 scale, by using lithostratigraphic criteria and unconformity-bounded units, in...

  • Volcanoes: Level D.  // Science Weekly;4/11/2005, Vol. 21 Issue 12, pD1 

    The article discusses the origin of volcanoes. It states that volcanoes can be tall mountains, sunken craters or cracks. It notes that volcanologists study about volcanoes and predict its future eruptions. It notes that erupted volcanoes formed into new lands and islands. The article cites a...

  • Volcanoes: Level E.  // Science Weekly;4/11/2005, Vol. 21 Issue 12, pE1 

    The article discusses how to measure a volcanic explosion. It states that scientists use volcanic eruption index (VEI) to measure lava flow and the worst VEI recorded is the eruption of Mt. Kilauea in Hawaii. It cites a do-it-yourself experiment about lava flow as well as a quiz and puzzle that...

  • Crustal Contamination of Picritic Magmas During Transport Through Dikes: the Expo Intrusive Suite, Cape Smith Fold Belt, New Quebec.  // Journal of Petrology;May2007, Vol. 48 Issue 5, p1021 

    The Proterozoic Expo Intrusive Suite comprises a series of mafic to ultramafic intrusions crosscutting the Povungnituk Group of the Cape Smith Fold Belt in New Quebec. The intrusions are mainly in the form of blade-shaped dikes that penetrate a sediment-rich horizon in the middle of the...

  • Voluminous lava flows at Oldoinyo Lengai in 2006: chronology of events and insights into the shallow magmatic system. Matthieu Kervyn; Gerald Ernst; Jurgis Klaudius; Jörg Keller; François Kervyn; Frederic Belton; Evelyne Mbede; Patric Jacobs // Bulletin of Volcanology;Sep2008, Vol. 70 Issue 9, p1069 

    Abstract  The largest natrocarbonatite lava flow eruption ever documented at Oldoinyo Lengai, NW Tanzania, occurred from March 25 to April 5, 2006, in two main phases. It was associated with hornito collapse, rapid extrusion of lava covering a third of the crater and emplacement...

  • A SOUL-SAVING ERUPTION. Brynjólfsson, Bjarni // Iceland Review;2010, Vol. 48 Issue 1, p4 

    The author reflects on the volcanic eruption of the Fmmvörduháls mountain range in Iceland. He says that the eruption brought in something unexpected in Iceland as it had helped the nation realized that there is more than money, debt and politics. He adds that given the eruption, there are...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics