Ground deformations and volcanic processes as imaged by CGPS data at Mt. Etna (Italy) between 2003 and 2008

Journal of Geophysical Research: Solid Earth

Volumn 117, Issue 7, 2012, Pages

  Bruno, Valentina ^a   Mattia, Mario ^a   Aloisi, Marco ^a   Palano, Mimmo ^a   Cannavò, Flavio ^a   Holt, William E ^b  

^a ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA   (Italy)

^b STONY BROOK UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CRUSTAL DEFORMATION; DEFLATION; DEFORMATION MECHANISM; GPS; SEISMICITY; SHEAR STRAIN; STRAIN RATE; TIME SERIES; VOLCANIC ERUPTION;

CATANIA [SICILY]; ETNA; ITALY; SICILY;

EID: 84864579933     PISSN: 21699313     EISSN: 21699356     Source Type: Journal    
DOI: 10.1029/2011JB009114     Document Type: Article

References (96)

1. Aiuppa, A., et al. (2010), Patterns in the recent 2007-2008 activity of Mount Etna volcano investigated by integrated geophysical and geochemical observations, Geochem. Geophys. Geosyst., 11, Q09008, doi:10.1029/2010GC003168.
2. Allard, P., B. Behncke, S. D'Amico, M. Neri, and S. Gambino (2006), Mount Etna 1993-2005: Anatomy of an evolving eruptive cycle, Earth Sci. Rev., 78, 85-114, doi:10.1016/j.earscirev. 2006.04.002. (Pubitemid 44313476)
3. Aloisi, M., O. Cocina, G. Neri, B. Orecchio, and E. Privitera (2002), Seismic tomography of the crust underneath the Etna volcano, Sicily, Phys. Earth Planet. Inter., 134, 139-155, doi:10.1016/S0031-9201 (02) 00153-X. (Pubitemid 35389758)
4. Aloisi, M., A. Bonaccorso, S. Gambino, M. Mattia, and G. Puglisi (2003), Etna 2002 eruption imaged from continuous tilt and GPS data, Geophys. Res. Lett., 30(23), 2214, doi:10.1029/2003GL018896.
5. Aloisi, M., A. Bonaccorso, F. Cannavò, S. Gambino, M. Mattia, G. Puglisi, and E. Boschi (2009), A new dyke intrusion style for the Mount Etna May 2008 eruption modelled through continuous tilt and GPS data, Terra Nova, 21, 316-321, doi:10.1111/j.1365-3121.2009.00889.x.
6. Aloisi, M., M. Mattia, C. Ferlito, M. Palano, V. Bruno, and F. Cannavò (2011a), Imaging the multi-level magma reservoir at Mt. Etna volcano (Italy), Geophys. Res. Lett., 38, L16306, doi:10.1029/2011GL048488.
7. Aloisi, M., M. Mattia, C. Monaco, and F. Pulvirenti (2011b), Magma, faults, and gravitational loading at Mount Etna: The 2002-2003 eruptive period, J. Geophys. Res., 116, B05203, doi:10.1029/2010JB007909.
8. Altamimi, Z., X. Collilieux, J. Legrand, B. Garayt, and C. Boucher (2007), ITRF2005: A new release of the International Terrestrial Reference Frame based on time series of station positions and Earth Orientation Parameters, J. Geophys. Res., 112, B09401, doi:10.1029/2007JB004949. (Pubitemid 350091253)
9. Andronico, D., et al. (2005), A multi-disciplinary study of the 2002-2003 Etna eruption: Insights for a complex plumbing system, Bull. Volcanol., 67, 314-330, doi:10.1007/s00445-004-0372-8. (Pubitemid 40531011)
10. Andronico, D., A. Cristaldi, and S. Scollo (2008), The 4-5 September 2007 lava mountain at South-East Crater of Mt. Etna, Italy, J. Volcanol. Geotherm. Res., 173, 325-328, doi:10.1016/j.jvolgeores.2008.02.004.
11. Argnani, A., and C. Bonazzi (2005), Malta Escarpment fault zone offshore eastern Sicily: Pliocene-Quaternary tectonic evolution based on new multichannel seismic data, Tectonics, 24, TC4009, doi:10.1029/2004TC001656. (Pubitemid 41582506)
12. Azzaro, R. (1997), Seismicity and active tectonics along the Pernicana Fault, Mt. Etna (Italy), Acta Vulcanol., 9, 7-14.
13. Azzaro, R. (1999), Earthquake surface faulting at Mount Etna volcano (Sicily) and implications for active tectonics, J. Geodyn., 28, 193-213, doi:10.1016/S0264-3707 (98) 00037-4. (Pubitemid 29429331)
14. Azzaro, R. (2004), Seismicity and active tectonics in the Etna Region: Constraints for a seismotectonic model, in Mt. Etna: Volcano Laboratory, Geophys. Monogr. Ser., vol. 143, edited by A. Bonaccorso et al., pp. 205-220, AGU, Washington, D. C., doi:10.1029/143GM13.
15. Beavan, J., and J. Haines (2001), Contemporary horizontal velocity and strain rate fields of the Pacific-Australian plate boundary zone through New Zealand, J. Geophys. Res., 106, 741-770, doi:10.1029/2000JB900302.
16. Behncke, B., and M. Neri (2003), Cycles and trends in the recent eruptive behaviour of Mt. Etna (Italy), Can. J. Earth Sci., 40, 1405-1411, doi:10.1139/e03-052. (Pubitemid 38185002)
17. Behncke, B., S. Falsaperla, and E. Pecora (2009), Complex magma dynamics at Mount Etna revealed by seismic, thermal, and volcanological data, J. Geophys. Res., 114, B03211, doi:10.1029/2008JB005882.
18. Bianca, M., C. Monaco, L. Tortorici, and L. Cernobori (1999), Quaternary normal faulting in southeastern Sicily (Italy): A seismic source for the 1693 large earthquake, Geophys. J. Int., 139, 370-394, doi:10.1046/j.1365-246x.1999. 00942.x. (Pubitemid 30037651)
19. Bonaccorso, A., and P. M. Davis (2004), Modeling of ground deformation associated with recent lateral eruptions: Mechanics of magma ascent and intermediate storage at Mt. Etna, in Mt. Etna: Volcano Laboratory, Geophys. Monogr. Ser., vol. 143, edited by A. Bonaccorso et al., pp. 293-306, AGU, Washington, D. C., doi:10.1029/143GM18.
20. Bonaccorso, A., and D. Patanè (2001), Shear response to an intrusive episode at Mt. Etna volcano (January 1998) inferred through seismic and tilt data, Tectonophysics, 334, 61-75, doi:10.1016/S0040-1951 (01) 00056-7. (Pubitemid 32579661)
21. Bonaccorso, A., S. D'Amico, M. Mattia, and D. Patanè (2004), Intrusive mechanisms at Mt. Etna forerunning the July August 2001 eruption, Pure Appl. Geophys., 161, 1469-1487, doi:10.1007/s00024-004-2515-4. (Pubitemid 38905003)
22. Bonaccorso, A., S. Cianetti, C. Giunchi, E. Trasatti, M. Bonafede, and E. Boschi (2005), Analytical and 3D numerical modeling of Mt. Etna (Italy) volcano inflation, Geophys. J. Int., 163(2), 852-862, doi:10.1111/j.1365-246X.2005. 02777.x. (Pubitemid 43922814)
23. Bonaccorso, A., A. Bonforte, F. Guglielmino, M. Palano, and G. Puglisi (2006), Composite ground deformation pattern forerunning the 2004-2005 Mount Etna eruption, J. Geophys. Res., 111, B12207, doi:10.1029/2005JB004206. (Pubitemid 47248746)
24. Bonafede, M., M. Dragoni, and F. Quareni (1986), Displacement and stress fields produced by a centre of dilation and by a pressure source in a viscoelastic half-space: Application to the study of ground deformation and seismic activity at Campi Flegrei, Italy, Geophys. J. R. Astron. Soc., 87, 455-485, doi:10.1111/j.1365-246X.1986.tb06632.x.
25. Bonanno, A., M. Palano, E. Privitera, S. Gresta, and G. Puglisi (2011), Magma intrusion mechanisms and redistribution of seismogenic stress at Mt. Etna volcano (1997-1998), Terra Nova, 00, 1-10, doi:10.1111/j.1365-3121.2011.01019.x.
26. Bonforte, A., and G. Puglisi (2003), Magma uprising and flank dynamics on Mount Etna volcano, studied using GPS data (1994-1995), J. Geophys. Res., 108(B3), 2153, doi:10.1029/2002JB001845.
27. Bonforte, A., A. Bonaccorso, G. Francesco, M. Palano, and G. Puglisi (2008), Feeding system and magma storage beneath Mt. Etna as revealed by recent inflation/deflation cycles, J. Geophys. Res., 113, B05406, doi:10.1029/ 2007JB005334.
28. Bonforte, A., F. Guglielmino, M. Coltelli, A. Ferretti, and G. Puglisi (2011), Structural assessment of Mount Etna volcano from Permanent Scatterers analysis, Geochem. Geophys. Geosyst., 12, Q02002, doi:10.1029/2010GC003213.
29. Borgia, A., L. Ferrari, and G. Pasquarè (1992), Importance of gravitational spreading in the tectonic and volcanic evolution of Mount Etna, Nature, 357, 231-235, doi:10.1038/357231a0.
30. Borgia, A., R. Lanari, E. Sansosti, M. Tesauro, P. Berardino, G. Fornaro, M. Neri, and J. B. Murray (2000), Actively growing anticlines beneath Catania from distal motion of Mount Etna's decollement measured by SAR interferometry and GPS, Geophys. Res. Lett., 27, 3409-3412, doi:10.1029/1999GL008475. (Pubitemid 32043175)
31. Branca, S., and P. Del Carlo (2005), Types of eruptions of Etna volcano AD 1670-2003: Implications of short-term eruptive activity, Bull. Volcanol., 67, 732-742, doi:10.1007/s00445-005-0412-z. (Pubitemid 41447432)
32. Burollet, P. F., J. M. Muginot, and P. Sweeney (1978), The geology of the Pelagian Block: The margins and basins of southern Tunisia and Tripolitania, in Ocean Basins and Margins, edited by A. E. M. Nairn et al., pp. 331-359, Plenum, New York.
33. Burton, M. R., et al. (2005), Etna 2004-2005: An archetype for geodynamically-controlled effusive eruptions, Geophys. Res. Lett., 32, L09303, doi:10.1029/2005GL022527. (Pubitemid 40875809)
34. Corsaro, R. A., and M. Pompilio (2004), Dynamics of magmas at Mount Etna, in Mt. Etna: Volcano Laboratory, Geophys. Monogr. Ser., vol. 143, edited by A. Bonaccorso et al., pp. 91-110, AGU, Washington, D. C., doi:10.1029/143GM07.
35. Davis, P. M. (1986), Surface deformation due to inflation of an arbitrarily oriented triaxial ellipsoidal cavity in an elastic half-space, with reference to Kilauea volcano, Hawaii, J. Geophys. Res., 91(B7), 7429-7438, doi:10.1029/JB091iB07p07429.
36. Dixon, T. H., M. M. Miller, F. Farina, H. Wang, and D. Johnson (2000), Present-day motion of Sierra Nevada block and some tectonic implications for the Basin and Range province: North America Cordillera, Tectonics, 19, 1-24, doi:10.1029/1998TC001088.
37. Efron, B. (1982), The Jackknife, the Bootstrap and Other Resampling Plans, Soc. for Ind. and Appl. Math., Philadelphia, Pa., doi:10.1137/1. 9781611970319.
38. Ferlito, C., and G. Lanzafame (2010), The role of supercritical fluids in the potassium enrichment of magmas at Mount Etna volcano (Italy), Lithos, 119, 642-650, doi:10.1016/j.lithos.2010.08.006.
39. Ferlito, C., M. Coltorti, R. Cristofolini, and P. P. Giacomoni (2009), The contemporaneous emission of low-K and high-K trachybasalts and the role of the NE Rift during the 2002 eruptive event, Mt. Etna, Italy, Bull. Volcanol., 71, 575-587, doi:10.1007/s00445-008-0243-9.
40. Ferlito, C., M. Viccaro, E. Nicotra, and R. Cristofolini (2012), Regimes of magma recharge and their control on the eruptive behaviour during the period 2001-2005 at Mt. Etna volcano, Bull. Volcanol., 74, 533-543, doi:10.1007/s00445-011-0537-1.
41. Froger, J. L., O. Merle, and P. Briole (2001), Active spreading and regional extension at Mt. Etna imaged by SAR interferometry, Earth Planet. Sci. Lett., 187, 245-258, doi:10.1016/S0012-821X (01) 00290-4. (Pubitemid 32494882)
42. Ellis, M., and G. C. P. King (1991), Structural control of flank volcanism in continental rifts, Science, 254, 839-842, doi:10.1126/science.254. 5033. 839. (Pubitemid 21917407)
43. Gillot, P. Y., G. Kieffer, and R. Romano (1994), The evolution of Mount Etna in the light of potassium-argon dating, Acta Vulcanol., 5, 81-87.
44. Goldberg, D. E. (1989), Genetic Algorithms in Search, Optimization and Machine Learning, Addison-Wesley, Reading, Mass.
45. Groppelli, G., and A. Tibaldi (1999), Control of rock rheology on deformation style and slip-rate along the active Pernicana Fault, Mt. Etna, Italy, Tectonophysics, 305, 521-537, doi:10.1016/S0040-1951 (99) 00035-9. (Pubitemid 29390888)
46. Guest, J. E., and J. B. Murray (1979), An analysis of hazard from Mount Etna volcano, J. Geol. Soc. London, 136, 347-354, doi:10.1144/gsjgs.136.3.0347.
47. Gutenberg, B., and C. F. Richter (1956), Earthquake magnitude, intensity, energy and acceleration, Bull. Seismol. Soc. Am., 46, 105-145.
48. Haines, A. J., and W. E. Holt (1993), A procedure for obtaining the complete horizontal motions within zones of distributed deformation from the inversion of strain rate data, J. Geophys. Res., 98, 12, 057-12, 082, doi:10.1029/93JB00892.
49. Haines, A. J., A. Jackson, W. E. Holt, and D. C. Agnew (1998), Representing distributed deformation by continuous velocity fields, Sci. Rep. 98/5, Inst. of Geol. and Nucl. Sci., Lower Hutt, N. Z.
50. Herring, T. A. (2004), GLOBK: Global Kalman filter VLBI and GPS analysis program, version 10.2, user's manual, Mass. Inst. of Technol., Cambridge.
51. Hirn, A., A. Nercessian, M. Sapin, F. Ferrucci, and G. Wittlinger (1991), Seismic heterogeneity of Mt. Etna: Structure and activity, Geophys. J. Int., 105, 139-153, doi:10.1111/j.1365-246X.1991.tb03450.x.
52. Hirn, A., R. Nicolich, J. Gallart, M. Laigle, and L. Cernobori, and the ETNASEIS Scientific Group (1997), Roots of Etna volcano in faults of great earthquakes, Earth Planet. Sci. Lett., 148, 171-191, doi:10.1016/S0012-821X (97) 00023-X.
53. Holt, W. E., and A. J. Haines (1995), The kinematics of northern South Islands, New Zealand, determined from geologic strain rates, J. Geophys. Res., 100, 17, 991-18, 010, doi:10.1029/95JB01059.
54. Imbò, G. (1928), Sistemi eruttivi etnei [in Italian], Bull. Volcanol, Ser. I, 5, 89-119.
55. King, R. W., and Y. Bock (2004), Documentation of the MIT GPS Analysis Software: GAMIT, release 10.2, user's manual, Mass. Inst. of Technol., Cambridge.
56. Kreemer, C., W. E. Holt, S. Goes, and R. Govers (2000), Active deformation in eastern Indonesia and the Philippines from GPS and seismicity data, J. Geophys. Res., 105(B1), 663-680, doi:10.1029/1999JB900356.
57. Lahr, J. C. (1989), Hypoellipse version 2.0: A computer program for determining local earthquake hypocentral parameters, magnitude and first motion pattern, U. S. Geol. Surv. Open File Rep., 89/116, 81 pp.
58. Lewis, R. M., and V. Torczon (1999), Pattern search algorithms for bound constrained minimization, SIAM J. Optim., 9(4), 1082-1099, doi:10.1137/ S1052623496300507. (Pubitemid 129489318)
59. Lo Giudice, E., G. Patanè, R. Rasà, and R. Romano (1982), The structural frame work of Mount Etna, Mem. Soc. Geol. Ital., 23, 125-158.
60. Lundgren, P., F. Casu, M. Manzo, A. Pepe, P. Berardino, E. Sansosti, and R. Lanari (2004), Gravity and magma induced spreading of Mount Etna volcano revealed by satellite radar interferometry, Geophys. Res. Lett., 31, L04602, doi:10.1029/2003GL018736.
61. Maaz, R., W. Ullmann, and V. Kbrnik (1974), Map of the seismic energy flux: Example of western Greece, Pure Appl. Geophys., 112, 5-9, doi:10.1007/BF00875911.
62. Makris, J., R. Nicolich, and W. Weigel (1986), A seismic study in the western Ionian sea, Ann. Geophys., 6 B, 665-678.
63. Mao, A., C. G. A. Harrison, and T. H. Dixon (1999), Noise in GPS coordinate time series, J. Geophys. Res., 104(B2), 2797-2816, doi:10.1029/1998JB900033. (Pubitemid 29276217)
64. Mastin, L. G., E. Roeloffs, N. M. Beeler, and J. E. Quick (2008), Constraints on the size, overpressure, and volatile content of the Mount St. Helens Magma system from geodetic and dome growth measurements during the 2004-2006+ Eruption, in A Volcano Rekindled: The Renewed Eruption of Mount St. Helens, edited by D. R. Sherrod, W. E. Scott, and P. H. Stauffer, U. S. Geol. Surv. Prof. Pap., 1750, pp. 461-488.
65. Mastin, L. G., M. Lisowski, E. Roeloffs, and N. Beeler (2009), Improved constraints on the estimated size and volatile content of the Mount St. Helens magma system from the 2004-2008 history of dome growth and deformation, Geophys. Res. Lett., 36, L20304, doi:10.1029/2009GL039863.
66. Mattia, M., M. Palano, V. Bruno, and F. Cannavò (2009), Crustal motion along the Calabro-Peloritano Arc as imaged by twelve years of measurements on a dense GPS network, Tectonophysics, 476, 528-537, doi:10.1016/j.tecto.2009.06.006.
67. Mattia, M., V. Bruno, F. Cannavò, and M. Palano (2011), Evidences of a contractional pattern along the northern rim of the Hyblean Plateau (Sicily, Italy) from GPS data, Geol. Acta, 10, 63-70.
68. McCaffrey, R., A. I. Qamar, R. W. King, R. Wells, G. Khazaradze, C. A. Williams, C. W. Stevens, J. J. Vollick, and P. C. Zwick (2007), Fault locking, block rotation and crustal deformation in the Pacific Northwest, Geophys. J. Int., 169, 1315-1340, doi:10.1111/j.1365-246X.2007. 03371.x. (Pubitemid 46894910)
69. McGuire, W. J., and A. D. Pullen (1989), Location and orientation of eruptive fissures and feeder-dykes at Mount Etna: Influence of gravitational and regional tectonic stress regimes, J. Volcanol. Geotherm. Res., 38, 325-344, doi:10.1016/0377-0273 (89) 90046-2.
70. McGuire, W. J., J. L. Moss, S. J. Saunders, and I. S. Stewart (1996), Dikeinduced rifting and edifice instability at Mount Etna, paper presented at Etna: Fifteen Years On, Cheltenham and Gloucester Coll. of Higher Educ., Gloucestershire, U. K.
71. McTigue, D. F. (1987), Elastic stress and deformation near a finite sphericalmagma body: Resolution of the point source paradox, J. Geophys. Res., 92, 12, 931-12, 940, doi:10.1029/JB092iB12p12931.
72. Mogi, K. (1958), Relations between the eruptions of various volcanoes and the deformations of the ground surface around them, Bull. Earthquake Res. Inst., 36, 99-134.
73. Monaco, C., L. Petronio, and M. Romanelli (1995), Tettonica estensionale nel settore orientale del Monte Etna (Sicilia): Dati morfotettonici e sismici, [in Italian], Stud. Geol. Camerti, 2, 363-374.
74. Monaco, C., P. Tappoiner, L. Tortorici, and P. Y. Gillot (1997), Late Quaternary slip rates on the Acireale-Piedimonte normal faults and tectonic origin of Mt. Etna (Sicily), Earth Planet. Sci. Lett., 147, 125-139, doi:10.1016/S0012-821X (97) 00005-8.
75. Monaco, C., S. Catalano, O. Cocina, G. De Guidi, C. Ferlito, S. Gresta, C. Musumeci, and L. Tortorici (2005), Tectonic control on the eruptive dynamics at Mt. Etna Volcano (Sicily) during the 2001 and 2002-2003 eruptions, J. Volcanol. Geotherm. Res., 144, 211-233, doi:10.1016/j. jvolgeores.2004.11.024. (Pubitemid 40882169)
76. Monaco, C., G. De Guidi, and C. Ferlito (2010), The morphotectonic map of Mt. Etna, Ital. J. Geosci., 129(3), 408-428.
77. Murru, M., C. Montuori, M. Wyss, and E. Privitera (1999), The locations of magma chambers at Mt. Etna, Italy, mapped by b-values, Geophys. Res. Lett., 26(16), 2553-2556, doi:10.1029/1999GL900568. (Pubitemid 30028413)
78. Neri, M., and V. Acocella (2006a), The 2004-2005 Etna eruption: Implications for flank deformation and structural behaviour of the volcano, J. Volcanol. Geotherm. Res., 158, 195-206, doi:10.1016/j. jvolgeores.2006.04.022. (Pubitemid 44550754)
79. Neri, M., V. Acocella, and B. Behncke (2004), The role of the Pernicana Fault System in the spreading of Mount Etna (Italy) during the 2002-2003 eruption, Bull. Volcanol., 66, 417-430, doi:10.1007/s00445-003-0322-x. (Pubitemid 39347799)
80. Neri, M., B. Behncke, M. Burton, G. Galli, S. Giammanco, E. Pecora, E. Privitera, and D. Reitano (2006b), Continuous soil radon monitoring during the July 2006 Etna eruption, Geophys. Res. Lett., 33, L24316, doi:10.1029/ 2006GL028394. (Pubitemid 47277780)
81. Nicolich, R., M. Laigle, A. Hirn, L. Cernobori, and J. Gallart (2000), Crustal structure of the Ionian margin of Sicily: Etna volcano in the frame of regional evolution, Tectonophysics, 329, 121-139, doi:10.1016/S0040-1951 (00) 00192-X. (Pubitemid 32305217)
82. Palano, M., G. Puglisi, and S. Gresta (2008), Ground deformation patterns at Mt. Etna from 1993 to 2000 from joint use of InSAR and GPS techniques, J. Volcanol. Geotherm. Res., 169, 99-120, doi:10.1016/j. jvolgeores.2007.08.014.
83. Palano, M., S. Gresta, and G. Puglisi (2009), Time-dependent deformation of the eastern flank of Mt. Etna: After-slip or viscoelationastic relaxation?, Tectonophysics, 473, 300-311, doi:10.1016/j.tecto.2009.02.047.
84. Palano, M., M. Rossi, F. Cannavò, V. Bruno, M. Aloisi, D. Pellegrino, M. Pulvirenti, G. Siligato, and M. Mattia (2010), Etn@ref: A geodetic reference frame for Mt. Etna GPS networks, Ann. Geophys., 53(4), 49-57.
85. Patanè, D., and E. Privitera (2001), Seismicity related to 1989 and 1991-93 Mt. Etna (Italy) eruptions: Kinematic constraints by FPS analysis, J. Volcanol. Geotherm. Res., 109, 77-98, doi:10.1016/S0377-0273 (00) 00305-X. (Pubitemid 33053110)
86. Patanè, D., M. Mattia, and M. Aloisi (2005), Shallow intrusive processes during 2002-2004 and current volcanic activity on Mt. Etna, Geophys. Res. Lett., 32, L06302, doi:10.1029/2004GL021773. (Pubitemid 40771645)
87. Puglisi, G., P. Briole, and A. Bonforte (2004), Twelve years of ground deformation studies on Mt. Etna volcano based on GPS surveys, in Mt. Etna: Volcano Laboratory, Geophys. Monogr. Ser., vol. 143, edited by A. Bonaccorso et al., pp. 321-341, AGU, Washington, D. C., doi:10.1029/143GM20
88. Puglisi, G., A. Bonforte, A. Ferretti, F. Guglielmino, M. Palano, and C. Prati (2008), Dynamics of Mount Etna before, during, and after the July-August 2001 eruption inferred from GPS and differential synthetic aperture radar interferometry data, J. Geophys. Res., 113, B06405, doi:10.1029/2006JB004811.
89. Rasà, R., R. Azzaro, and O. Leonardi (1996), Aseismic creep on faults and flank instability at Mt. Etna volcano, Geol. Soc. Spec. Publ., 110, 179-192, doi:10.1144/GSL. SP.1996.110.01.14.
90. Rust, D., B. Behncke, M. Neri, and A. Ciocanel (2005), Nested zones of instability in the Mount Etna volcani edifice, Italy, J. Volcanol. Geotherm. Res., 144, 137-153, doi:10.1016/j.jvolgeores.2004.11.021. (Pubitemid 40876213)
91. Solaro, G., V. Acocella, S. Pepe, J. Ruch, M. Neri, and E. Sansosti (2010), Anatomy of an unstable volcano from InSAR: Multiple processes affecting flank instability at Mt. Etna, 1994-2008, J. Geophys. Res., 115, B10405, doi:10.1029/2009JB000820.
92. Tiampo, K. F., J. B. Rundle, J. Fernandez, and J. O. Langbein (2000), Spherical and ellipsoidal volcanic sources at Long Valley caldera, California, using a genetic algorithm inversion technique, J. Volcanol. Geotherm. Res., 102, 189-206, doi:10.1016/S0377-0273 (00) 00185-2. (Pubitemid 32166118)
93. Wadge, G., G. P. L. Walker, and J. E. Guest (1975), The output of the Etna volcano, Nature, 213, 484-485.
94. Williams, C. A., and G. Wadge (1998), The effects of topography on magma chamber deformation models: Application to Mt. Etna and radar interferometry, Geophys. Res. Lett., 25(10), 1549-1552, doi:10.1029/98GL01136. (Pubitemid 28429791)
95. Williams, C. A., and G. Wadge (2000), An accurate and efficient method for including the effects of topography in three-dimensional elastic models of ground deformation with applications to radar interferometry, J. Geophys. Res., 105(B4), 8103-8120, doi:10.1029/1999JB900307.
96. Yang, X. M., P. M. Davis, and J. H. Dieterich (1988), Deformation from inflation of a dipping finite prolate spheroid in an elastic half-space as a model for volcanic stressing, J. Geophys. Res., 93, 4249-4257, doi:10.1029/JB093iB05p04249.