Publication Date:
2017-04-04
Description:
The continuous volcanic and seismic activity at Mount Etna makes this volcano an important
laboratory for seismological and geophysical studies. We used repeated three-dimensional
tomography to detect variations in elastic parameters during different volcanic cycles, before and
during the October 2002–January 2003 flank eruption. Well-defined anomalous low P- to S-wave
velocity ratio volumes were revealed. Absent during the pre-eruptive period, the anomalies trace
the intrusion of volatile-rich (Q4 weight percent) basaltic magma, most of which rose up only a few
months before the onset of eruption. The observed time changes of velocity anomalies suggest that
four-dimensional tomography provides a basis for more efficient volcano monitoring and shortand
midterm eruption forecasting of explosive activity.
Description:
Published
Description:
821-823
Description:
reserved
Keywords:
NONE
;
04. Solid Earth::04.01. Earth Interior::04.01.02. Geological and geophysical evidences of deep processes
;
04. Solid Earth::04.06. Seismology::04.06.07. Tomography and anisotropy
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Format:
727523 bytes
Format:
application/pdf
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