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| Titel |
Planning the improvement of a seismic network for monitoring active volcanic areas: the experience on Mt. Etna |
| VerfasserIn |
A. D'Alessandro, L. Scarfì, A. Scaltrito, S. Prima, S. Rapisarda |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: Improving seismic networks performances: from site selection to data integration (EGU2013 SM1.4/GI1.6 session) ; Nr. 36 (2013-10-23), S.39-47 |
| Datensatznummer |
250086178
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| Publikation (Nr.) |
 copernicus.org/adgeo-36-39-2013.pdf |
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| Zusammenfassung |
| Seismology and geodesy are generally seen as the most reliable diagnostic
tools for monitoring highly active or erupting volcanoes, like Mt. Etna.
From the early 1980's, seismic activity was monitored at Mt. Etna by a
permanent seismic network, progressively improved in the following years.
This network has been considerably enhanced since 2005 by 24-bit digital
stations equipped with broad-band (40 s) sensors. Today, thanks to a
configuration of 33 broad-band and 12 short-period stations, we have a good
coverage of the volcanic area as well as a high quality of the collected
data. In the framework of the VULCAMED project a workgroup of Istituto
Nazionale di Geofisica e Vulcanologia has taken on the task of developing
the seismic monitoring system, through the installation of other seismic
stations. The choice of optimal sites must be clearly made through a careful
analysis of the geometry of the existing seismic network. In this paper, we
applied the Seismic Network Evaluation through Simulation in order to
evaluate the performance of the Etna Seismic Network before and after the
addition of the stations in the candidate sites. The main advantage of the
adopted method is that we can evaluate the improvement of the network before
the actual installation of the stations. Our analysis has permitted to
identify some critical issues of the current permanent seismic network
related to the lack of stations in the southern sector of the volcano, which
is nevertheless affected by a number of seismogenic structures. We have
showed that the addition of stations at the candidate sites would greatly
extend the coverage of the network to the south by significantly reducing
the errors in the hypocenter parameters estimation. |
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