Earth-prints repository, logo   Istituto Nazionale di Geofisica e Vulcanologia

Istituto Nazionale di Geofisica e Vulcanologia
 
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library

Advanced Search
Earth-Prints Archive Policy
Why should you use Earth-prints?
 
Browse
Subjects
Titles
Authors
By Date
Keywords
 
Sign on to:
Receive email
updates
My DSpace
authorized users
Edit Profile
 
About DSpace

Earth-prints >
Affiliation >
INGV >
Papers Published / Papers in press >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/458

Share this record with your favourite social network:     Del.icio.us     Citeulike     Connotea
Facebook     Stumble it!     reddit    
Title: The role of the Pernicana Fault System in the spreading of Mt. Etna (Italy) during the 2002-2003 eruption
Authors: Neri, M.*
Acocella, V.*
Behncke, B.*
Keywords: Volcano spreading
Fracturing
Mt. Etna
Pernicana Fault System
NE Rift
Issue Date: Jul-2004
Publisher: Springer
Title of journal: Bulletin of Volcanology
Series/Report no.: 5/66(2004)
Abstract: Flank instability and collapse are observed at many volcanoes. Among these, Mt. Etna is characterized by the spreading of its eastern and southern flanks. The eastern spreading area is bordered to the north by the EW-trending Pernicana Fault System (PFS). During the 20022003 Etna eruption, ground fracturing along the PFS migrated eastward from the NE Rift, to as far as the 18 km distant coastline. The deformation consisted of dextral en-echelon segments, with sinistral and normal kinematics. Both of these components of displacement were one order of magnitude larger (~1 m) in the western, previously known, portion of the PFS with respect to the newly surveyed (~9 km long) eastern section (~0.1 m). This eastern section is located along a pre-existing, but previously unknown, fault, where displaced man-made structures give overall slip rates (11.9 cm/year), only slightly lower than those calculated for the western portion (1.42.3 cm/year). After an initial rapid motion during the first days of the 20022003 eruption, movement of the western portion of the PFS decreased dramatically, while parts of the eastern portion continued to move. These data suggest a model of spreading of the eastern flank of Etna along the PFS, characterized by eruptions along the NE Rift, instantaneous, short-lived, meter-scale displacements along the western PFS and more long-lived centimeter-scale displacements along the eastern PFS. The surface deformation then migrated southwards, reactivating, one after the other, the NNWSSE-trending Timpe and Trecastagni faults, with displacements of ~0.1 and ~0.04 m, respectively. These structures, along with the PFS, mark the boundaries of two adjacent blocks, moving at different times and rates. The new extent of the PFS and previous activity over its full length indicate that the sliding eastern flank extends well below the Ionian Sea. The clustering of seismic activity above 4 km b.s.l. during the eruption suggests a deep décollement for the moving mass. The collected data thus suggests a significant movement (volume >1,100 km3) of the eastern flank of Etna, both on-shore and off-shore.
URI: http://hdl.handle.net/2122/458
DOI: 10.1007/s00445-003-0322-x
Appears in Collections:Papers Published / Papers in press
04.04.09. Structural geology
05.02.03. Volcanic eruptions
04.08.08. Volcanic risk
04.08.06. Volcano monitoring

Files in This Item:

File Description SizeFormat
945 Neri M. et al.pdf974.81KbAdobe PDFView/Open
Springer.html523bHTMLView/Open
  • Acocella V, Neri M (2003) What makes flank eruptions? The 2001 Mount Etna eruption and its possible triggering mechanisms. Bull Volcanol 65:517–529 10.1007/s00445-003-0280-3
  • Ando M (1979) The Hawaii earthquake of November 29, 1975: low dip angle faulting due to forceful injection of magma. J Geophys Res 84:7616–7626
  • Azzaro R, Lo Giudice E, Rasà R (1988) Il terremoto di Piano Pernicana (Etna Nord) del 28/10/1988. Campo macrosismico e quadro deformativo fragile associato all’evento. Boll GNV 4:22–40
  • Azzaro R, Branca S, Giammanco S, Gurrieri S, Ras_ R, Valenza M (1998) New evidence for the form and extent of the Pernicana Fault System (Mt. Etna) from structural and soil-gas surveying. J Volcanol Geotherm Res 84:143–152
  • Behncke B, Neri M (2003) The July-August 2001 eruption of Mount Etna (Sicily). Bull Volcanol 65:461–476 10.1007/s00445-003-0274-1
  • Billi A, Acocella V, Funiciello R, Giordano G, Lanzafame G, Neri M (2003) Mechanisms for ground-surface fracturing and incipient slope failure associated to the July-August 2001 eruption of Mt. Etna, Italy: analysis of ephemeral field data. J Volcanol Geotherm Res 122:281–294 10.1016/S0377- 0273(02)00507-3
  • Borgia A, Ferrari L, Pasquarè G (1992) Importance of gravitational spreading in the tectonic and volcanic evolution of Mt. Etna. Nature 357:231–235
  • Borgia A, Delaney PT, Denlinger RP (2000a) Spreading volcanoes. Ann Rev Earth Planet Sci 28:539–570
  • Borgia A, Lanari R, Sansosti E, Tesauro M, Berardino P, Fornaio G, Neri M, Murray JB (2000b) Actively growing anticlines beneath Catania from the distal motion of Mount Etna’s decollement measured by SAR interferometry and GPS. Geophys Res Lett 27:3409–3412
  • Bousquet JC, Lanzafame G (2001) Nouvelle interpr_tation des fractures des _ruptions lat_rales de l’Etna: cons_quences pour son cadre tectonique. Bull Soc G_ol Fr 172:455–467
  • Calvari S, Pinkerton H (2002) Instabilities in the summit region of Mount Etna during the 1999 eruption. Bull Volcanol 63:526– 535
  • Calvari S, INGV-CT scientific staff (2002) Update on the eruptive activity at Mt. Etna: Multidisciplinary evidence of magma refilling (abs). Eos Trans. AGU 83(47) Fall Meet, Suppl F1483
  • Delaney PT, Denlinger RP, Lisowski M, Miklius A, Okubo PG, Okamura AT, Sako MK (1998) Volcanic spreading at Kilauea, 1976–1996. J Geophys Res 103:18003–18023
  • Delaney PT, Denlinger RP (1999) Stabilization of volcanic flanks by dike intrusion: an example from Kilauea. Bull Volcanol 61:356–362
  • Dvorak JJ, Okamura AT, English TT, Koyanagi RY, Nakata JS, Sako MK, Tanigawa WT, Yamashita WT (1986) Mechanical response of the south flank of Kilauea volcano, Hawaii, to intrusive events along the rift systems. Tectonophysics 124:193–209
  • Ferrari L, Gardu_o VH, Neri M (1991) I dicchi della valle del Bove, Etna: un metodo per stimare le dilatazioni di un apparato vulcanico. Mem Soc Geol Ital 47:495–508
  • Froger JL, Merle O, Briole P (2001) Active spreading and regional extension at Mount Etna imaged by SAR interferometry. Earth Planet Sci Lett 187:245–258
  • Gardu_o VH, Neri M, Pasquarè G, Borgia A, Tibaldi A (1997) Geology of the NE Rift of Mount Etna, Sicily (Italy). Acta Vulcanol 9:91–100
  • INGV (2002) List of Italian earthquakes (16–30 Sep, 2002). http://www.ingv.it/~roma/reti/rms/bollettino/set0202/lista.htm
  • Kieffer G (1985) volution structurale et dynamique d’un grand volcan polyg_nique: stade d’_dification et activit_ actuelle de l’Etna. PhD Thesis, Univ Clermont-Ferrand II, pp 1–497
  • Lanzafame G, Neri M, Acocella V, Billi A, Funiciello R, Giordano G (2003) Structural features of the July-August 2001 Mount
  • Etna eruption: evidence for a complex magmatic system. J Geol Soc Lond 160:531–544
  • Lo Giudice E, Rasà R (1992) Very shallow earthquakes and brittle deformation in active volcanic areas: the etnean region as an example. Tectonophysics 202:257–268
  • McGuire WJ, Pullen AD (1989) Location and orientation of eruptive fissures and feeder-dykes at Mount Etna: influence of gravitational and regional stress regimes. J Volcanol Geotherm Res 38:325–244
  • Neri M, Gardu_o VH, Pasquarè G, Ras_ R (1991) Studio strutturale e modello cinematico della Valle del Bove e del settore nordorientale etneo. Acta Vulcanol 1:17–24
  • Neri M, Rossi M (2002) Geometria e volume dell’apparato vulcanico etneo: il contributo offerto dall’uso di mappe digitali. Quad Geofis 20:9–15 http://www.ingv.it/~roma/cultura/biblioteca/ biblioframe.html
  • Obrizzo F, Pingue F, Troise C, De Natale G (2001) Coseismic displacements and creeping along the Pernicana fault (Etna, Italy) in the last 17 years: a detailed study of a tectonic structure on a volcano. J Volcanol Geotherm Res 109:109–131
  • Parfitt EA, Peacock DCP (2001) Faulting in the south flank of Kilauea volcano, Hawaii. J Volcanol Geotherm Res 106:265– 284
  • Patanè D (2002) Aggiornamento delle attivit_ di monitoraggio sismico all’Etna. http://www.ct.ingv.it/report/Rapporto_eruzione
  • 20021030.pdf
  • Patanè D, De Gori P, Chiarabba C, Bonaccorso A (2003) Magma ascent and the pressurization of Mount Etna’s volcanic system. Science 299:2061–2063 10.1126/science.1080653
  • Pompilio M, Miraglia L, Corsaro RA (2002) I prodotti dell’eruzione di Ottobre 2002. Dati preliminari. http://www.ct.ingv.it/ Etna2002/Geo&Vulca/descprodotti30–10.htm
  • Pompilio M, Rutherford MJ (2002) Pre-eruption conditions and magma dynamics of recent amphibole-bearing Etna basalt (abs.) Eos Trans AGU 83(47) Fall Meet Suppl, F1419
  • Rust D, Neri M (1996) The boundaries of large-scale collapse on the flanks of Mount Etna, Sicily. In: McGuire WJ, Jones AP, Neuberg J (eds) Volcano instability on the Earth and other planets. Geol Soc Lond Spec Pub 110:193–208
  • Swanson DA, Duffield WA, Fiske RS (1976) Displacement of the south flank of Kilauea volcano: the result of forceful intrusion of magma into the rift zones. US Geol Surv Prof Pap 963, 39 pp
  • Tanguy JC, Kieffer G (1993) Les éruptions de l’Etna et leurs mécanismes. Mém Soc Géol Fr 163:239–252
  • Tibaldi A, Groppelli G (2002) Volcano-tectonic activity along structures of the unstable NE flank of Mt. Etna (Italy) and their possible origin. J Volcanol Geotherm Res 115:277–302
  • Van Wyk de Vries B, Francis PW (1997) Catastrophic collapse at stratovolcanoes induced by slow volcano spreading. Nature
  • 387:387–390
  • Van Wyk de Vries B, Self S, Francis PW, Keszthelyi L (2001) A gravitational spreading origin for the Socompa debris avalanche J Volcanol Geotherm Res 105:225–247
  • Voight B, Glicken H, Janda RJ, Douglas PM (1981) Catastrophic rockslide avalanche of May 18. In: Lipman PW, Mullineaux DR (eds) The 1980 eruptions of Mount St. Helens, Washington. Geol Surv Prof Pap 1250:347–377

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 
Valid XHTML 1.0! ICT Support, development & maintenance are provided by theAePIC team @CILEA.Powered onDSpace Software. Feedback