La stazione sismica di Serra La Nave sull' Etna

Bottari, A.; Riuscetti, M.

doi:10.4401/ag-4995

Annals of Geophysics

2011

DOI: 10.4401/ag-4995

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La stazione sismica di Serra La Nave sull' Etna

A. Bottari¹,

M. Riuscetti²

Abstract: Ricevuto il 10 Aprile 1967RIASSUNTO. -Si descrive la nuova stazione sismologica di Serra La Nave (Etna, Sicilia). Essa fa parte di una rete di stazioni in programma per la sorveglianza continua del vulcano.Con riferimento a quanto si fa in questo campo in altri paesi, viene auspicato il potenziamento di questa e delle future stazioni mediante altri strumenti quali clinometri, gravimetri e magnetometri.

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Instrumental seismic catalogue of Mt. Etna earthquakes (Sicily, Italy): ten years (2000-2010) of instrumental recordings

Alparone

Maiolino

Mostaccio

et al. 2015

Annals of Geophysics

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<p>Instrumental seismic catalogues are an essential tool for the zonation of the territory and the production of seismic hazard maps. They are also a valuable instrument for detailed seismological studies regarding active volcanoes and, above all, for interpreting the magma dynamics and the evolution of eruptive phenomena. In this paper, we show the first instrumental earthquake catalogue of Mt. Etna, for the period 2000-2010, with the purpose of producing a homogeneous dataset of 10 years of seismological observations. During this period, 16,845 earthquakes have been recorded by the seismic network run by the Istituto Nazionale di Geofisica and Vulcanologia, Osservatorio Etneo, in Catania. A total of 6,330 events, corresponding to approximately 40% of all earthquakes recorded, were located by using a one-dimensional VP velocity model. The magnitude completeness of the catalogue is equal to about 1.5 for the whole period, except for some short periods in 2001 and 2002-2003 and at the end of 2009. The reliability of the data collected is supported by the good values of the main hypocentral parameters through the time. The spatial distribution of seismicity allowed the highlighting of several seismogenetic areas characterized by different seismic rates and focal depths. This seismic catalogue represents a fundamental tool for several research aiming to a better understanding of the behavior of an active volcano such as Mt. Etna.</p><div> </div>

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Instrumental seismic catalogue of Mt. Etna earthquakes (Sicily, Italy): ten years (2000-2010) of instrumental recordings

Alparone

Maiolino

Mostaccio

et al. 2015

Annals of Geophysics

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Planning the improvement of a seismic network for monitoring active volcanic areas: the experience on Mt. Etna

et al. 2013

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Abstract. 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 broadband 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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La stazione sismica di Serra La Nave sull' Etna

Cited by 2 publications

References 3 publications

Instrumental seismic catalogue of Mt. Etna earthquakes (Sicily, Italy): ten years (2000-2010) of instrumental recordings

Instrumental seismic catalogue of Mt. Etna earthquakes (Sicily, Italy): ten years (2000-2010) of instrumental recordings

Planning the improvement of a seismic network for monitoring active volcanic areas: the experience on Mt. Etna

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