Displacement across the Trecastagni Fault (Mt. Etna) and induced seismicity: the October 2009 to January 2010 episode

Gambino, Salvatore and Bonforte, Alessandro and Carnazzo, Antonino and Falzone, Giuseppe and Ferrari, Ferruccio and Ferro, Angelo and Guglielmino, Francesco and Laudani, Giuseppe and Maiolino, Vincenza and Puglisi, Giuseppe (2011) Displacement across the Trecastagni Fault (Mt. Etna) and induced seismicity: the October 2009 to January 2010 episode. Annals of geophysics, 54 (4). pp. 414-423. ISSN 2037-416X

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Abstract

The Trecastagni Fault (TF) is a NNW-SSE tectonic structure inside Mt. Etna that is characterized by evident morphological scarps and normal and right-lateral type movements that directly affect roads and buildings. The TF has an important role in the instability that affects the south-eastern flank of Mt. Etna, and it represents part of the southern boundary of the unstable sector. Starting from 2005, the TF has been monitored using continuous wire extensometers and by carrying out periodic direct measurements across the northern and central sectors. From 2005 to September 2009, the measurements show that the TF has undergone continuous extension of about 2-3 mm/yr. During the October 2009 to January 2010 period, the creep rate of the TF reached up to 5.5 to 7.0 mm/yr, and this was accompanied by several shallow, low magnitude earthquakes that were felt by local people. This episode appears to be linked to the increase in the sliding velocity of the eastern flank that occurred during 2009.

Item Type:	Article
Uncontrolled Keywords:	Measurements and monitoring, Crustal deformations, Volcano seismology, Wire extensometer, Shallow earthquakes, Fault dynamics.
Subjects:	500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.1 Struttura generale e proprietà della Terra > 551.14 Proprietà della crosta (Include il calore, l'elasticità, le escursioni di temperatura) 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.2 Vulcani, terremoti, acque termali e gas > 551.21 Vulcani (Classificare qui la Vulcanologia; classificare qui le opere d'insieme sui crateri) (Classificare la Petrologia delle rocce vulcaniche in 552.2) 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.2 Vulcani, terremoti, acque termali e gas > 551.22 Terremoti (Classificare qui la Sismologia) (Classificare le onde di maremoto in 551.463)
Depositing User:	Tania Marcelli
Date Deposited:	19 Dec 2011 10:13
Last Modified:	19 Dec 2011 10:13
URI:	http://eprints.bice.rm.cnr.it/id/eprint/3818

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