2024-03-29T15:10:12Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/971102018-07-16T09:24:54Zcom_10261_82com_10261_8col_10261_335
López, Carmen
Martí Molist, Joan
Abella, Rafael
Tárraga, Marta
2014
0169-3298
http://hdl.handle.net/10261/97110
10.1007/s10712-014-9290-2
The impossibility of observing magma migration inside the crust obliges us to
rely on geophysical data and mathematical modelling to interpret precursors and to forecast
volcanic eruptions. Of the geophysical signals that may be recorded before and during an
eruption, deformation and seismicity are two of the most relevant as they are directly
related to its dynamic. The final phase of the unrest episode that preceded the 2011–2012
eruption on El Hierro (Canary Islands) was characterized by local and accelerated deformation
and seismic energy release indicating an increasing fracturing and a migration of
the magma. Application of time varying fractal analysis to the seismic data and the
characterization of the seismicity pattern and the strain and the stress rates allow us to
identify different stages in the source mechanism and to infer the geometry of the path used
by the magma and associated fluids to reach the Earth’s surface. The results obtained
illustrate the relevance of such studies to understanding volcanic unrest and the causes that
govern the initiation of volcanic eruptions.
eng
closedAccess
Volcano unrest
Eruption forecast
Fractal analysis
Fracture mechanisms
Feeding system
El Hierro
Applying Fractal Dimensions and Energy-Budget Analysis to Characterize Fracturing Processes During Magma Migration and Eruption: 2011–2012 El Hierro (Canary Islands) Submarine Eruption
artículo