Publication Date:
2017-04-04
Description:
Accepted for publication in (Geophysical Research Letters). Copyright (2009) American Geophysical Union. Further reproduction or electronic distribution is not permitted.”
Description:
During the second half of June, 2008, 50 broadband seismic stations were
deployed on Etna volcano in close proximity to the summit, allowing us to
observe seismic activity with exceptionally high resolution. 129 Long Period
events (LP) with dominant frequencies ranging between 0.3 and 1.2 Hz, were
extracted from this dataset. These events form two families of similar waveforms
with different temporal distributions. Event locations are performed
by cross-correlating signals for all pairs of stations in a two-step scheme. In
the first step, the absolute location of the centre of the clusters was found.
In the second step, all events are located using this position. The hypocentres
are found at shallow depths (0 to 700 m deep) below the summit craters.
The very high location resolution allows us to detect the temporal migration
of the events along a dike-like structure and 2 pipe shaped bodies, yielding
an unprecedented view of some elements of the shallow plumbing system
at Mount Etna. These events do not seem to be a direct indicator of the
ongoing lava flow or magma upwelling.
Description:
Published
Description:
L24305
Description:
3.6. Fisica del vulcanismo
Description:
JCR Journal
Description:
open
Keywords:
Long Period analysis
;
04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
