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|Authors: ||Ferro, A.*|
|Title: ||High precision tilt observation at Mt. Etna Volcano, Italy|
|Title of journal: ||Acta Geophysica|
|Series/Report no.: ||/(2010)|
|Issue Date: ||2010|
|Keywords: ||Tilt borehole tiltmeter|
|Abstract: ||In 2007-2008, we installed on Mt. Etna two deep tilt stations using high resolution, self-leveling
instruments. These installations are the result of accurate instrument tests, site selection, drilling and
sensor positioning that has allowed detecting variations related to the principal diurnal and
semidiurnal tides for first time on Mt. Etna using tilt data.
We analyzed the tidal effects recorded on tilt signals and we removed tidal effects from signals,
thereby allowing to detect changes of about 20 nanoradians with a considerable improvement
respect to the previous installation.
Tilt changes have accompanied the Mt. Etna main eruptive phases and are generally related to the
rapid rise of magma and formation of dikes and eruptive fissures. However, tilt changes characterize
lava fountains, earthquakes and inflation-deflation phases.
The 2008-2009 eruption represents an example of the potential of these tiltmeters providing new
perspectives for highly precise monitoring of ground deformation on volcanoes.|
|Appears in Collections:||01.01.08. Instruments and techniques|
Papers Published / Papers in press
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