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A reappraisal of shear wave splitting parameters from Italian active volcanic areas through a semiautomatic algorithm
Language
English
Obiettivo Specifico
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/13 (2009)
Publisher
Springer Netherlands
Pages (printed)
253–266
Issued date
2009
Abstract
Shear wave splitting parameters represent
a useful tool to detail the stress changes
occurring in volcanic environments before impending
eruptions. In the present paper, we display
the parameter estimates obtained through
implementation of a semiautomatic algorithm applied
to all useful datasets of the following Italian
active volcanic areas:Mt. Vesuvius,Campi Flegrei,
and Mt. Etna. Most of these datasets have been
the object of several studies (Bianco et al., Annali
di Geofisica, XXXXIX 2:429–443, 1996, J Volcanol
Geotherm Res 82:199–218, 1998a, Geophys
Res Lett 25(10):1545–1548, 1998b, Phys Chem
Earth 24:977–983, 1999, J Volcanol Geotherm Res
133:229–246, 2004, Geophys J Int 167(2):959–967,
2006; Del Pezzo et al., Bull Seismol Soc Am
94(2):439–452, 2004). Applying the semiautomatic
algorithm, we confirmed the results obtained in
previous studies, so we do not discuss in much
detail each of our findings but give a general
overview of the anisotropic features of the investigated
Italian volcanoes. In order to make a comparison
among the different volcanic areas, we
present our results in terms of the main direction of the fast polarization (ϕ) and percentage of
shear wave anisotropy (ξ )
a useful tool to detail the stress changes
occurring in volcanic environments before impending
eruptions. In the present paper, we display
the parameter estimates obtained through
implementation of a semiautomatic algorithm applied
to all useful datasets of the following Italian
active volcanic areas:Mt. Vesuvius,Campi Flegrei,
and Mt. Etna. Most of these datasets have been
the object of several studies (Bianco et al., Annali
di Geofisica, XXXXIX 2:429–443, 1996, J Volcanol
Geotherm Res 82:199–218, 1998a, Geophys
Res Lett 25(10):1545–1548, 1998b, Phys Chem
Earth 24:977–983, 1999, J Volcanol Geotherm Res
133:229–246, 2004, Geophys J Int 167(2):959–967,
2006; Del Pezzo et al., Bull Seismol Soc Am
94(2):439–452, 2004). Applying the semiautomatic
algorithm, we confirmed the results obtained in
previous studies, so we do not discuss in much
detail each of our findings but give a general
overview of the anisotropic features of the investigated
Italian volcanoes. In order to make a comparison
among the different volcanic areas, we
present our results in terms of the main direction of the fast polarization (ϕ) and percentage of
shear wave anisotropy (ξ )
References
Aster RC, Meyer RP, De Natale G, Zollo A, Martini M,
Del Pezzo E, Scarpa R, Iannaccone G (1992)
Seismic investigation of Campi Flegrei Caldera. Volcanic
Seismology, Proceedings of Volcanology Series
III. Springer, New York
Auger E, Gasparini P, Virieux J, Zollo A (2001)
Seismic evidence of an extended magmatic sill under
Mt. Vesuvius. Science 294:1510–1512
Bianco F, Castellano M, Milano G, Vilardo G (1996)
Shear-wave polarization alignment on the eastern
flank of Mt. Etna volcano (Sicily, Italy). Annali di
Geofisica XXXXIX 2:429–443 Bianco F, Castellano M, Milano G, Ventura G, Vilardo
G (1998a) The Somma-Vesuvius stress-field induced
by regional tectonic: evidences from seismological
and mesostructural data. J Volcanol Geotherm Res
82:199–218
Bianco F, Castellano M, Ventura G (1998b) Structural and
seismological features of the 1989 syn-eruptive NNW–
SSE fractures system at Mt. Etna. Geophys Res Lett
25(10):1545–1548
Bianco F, Castellano M, Milano G, Vilardo G, Ferrucci F,
Gresta S (1999) The seismic crisis at Mt. Vesuvius
during 1995 and 1996. Phys Chem Earth 24:977–983
Bianco F, Del Pezzo E, Saccorotti G, Ventura G (2004)
The role of hydrothermal fluids in triggering the July–
August 2000 seismic swarm at Campi Flegrei (Italy):
evidences from seismological and mesostructural data.
J Volcanol Geotherm Res 133:229–246
Bianco F, Scarfì L, Del Pezzo E, Patanè D (2006)
Shear wave splitting changes associated with the 2001
volcanic eruption on Mount Etna. Geophys J Int
167(2):959–967. doi:10.1111/j.1365-246X.2006.03152.x
Bonforte A, Puglisi G (2006) Dynamics of the eastern
flank of Mt. Etna volcano (Italy) investigated by a
dense GPS network. J Volcanol Geotherm Res 153:
357–369
Booth DC, Wyss M, Gillard D (1992) Shear-wave polarization
alignments recorded above the Kaoiki fault zone,
Hawaii. Geophys Res Lett 19:1141–1144
Bousquet JC, Lanzafame G (2004) The tectonics and geodynamics
of Mt. Etna: synthesis and interpretation of
geological and geophysical data. In: Bonaccorso A,
Calvari S, Coltelli M, Del Negro C, Falsaperla S (eds)
Etna Volcano Laboratory. AGU (Geophysical monograph
series), pp 29–47
Chouet B (1996) New methods and future trends in seismological
volcano monitoring. In: Scarpa R, Tilling RI
(eds) Monitoring and mitigation of volcanic hazards.
Springer, New York, pp 23–97
Crampin S (1993)Areview of the effects of crack geometry
on wave propagation through aligned cracks. Can J
Explor Geophys 29:3–17
Crampin S, Zatsepin SV (1997) Modeling the compliance
of crustal rock-II. Response to temporal changes
before earthquakes. Geophys J Int 129:495–506
Crampin S, Gao Y (2006) A review of techniques for measuring
shear-wave splitting above small earthquakes.
Phys Earth Planet Inter 159:1–14
Crampin S, Peacock S, Gao Y, Chastin S (2004) The scatter
of time delays in shear-wave splitting above small
earthquakes. Geophys J Int 156:39–44
Del Pezzo E, Bianco F, Petrosino S, Saccorotti G (2004)
Changes in coda decay rate and shear-wave splitting
parameters associated with seismic swarms at Mt.
Vesuvius, Italy. Bull Seismol Soc Am 94(2):439–452
Di Renzo V, Di Vito MA, Arienzo I, Carandente
A, Civetta L, D’Antonio M, Giordano F, Orsi G,
Tonarini S (2007) Magmatic history of Somma-
Vesuvius on the basis of new geochemical and isotopic
data from a deep borehole (Camaldoli della Torre).
J Petrol 48(4):753–784
Di Vito MA, Isaia R, Orsi G, Southon J, de Vita S,
D’Antonio M, Pappalardo L, Piochi M (1999) Volcanism
and deformation since 12,000 years at the
Campi Flegrei caldera (Italy). J Volcanol Geotherm
Res 91:221–246
Evans JR, Julian BR, Foulger GR, Ross A (1995) Shearwave
splitting from local earthquakes at The Geysers
geothermal field, California. Geophys Res Lett 22:
501–504
Gao Y, Crampin S (2004) Observations of stress relaxation
before earthquakes. Geophys J Int 157:578–582
Gao Y, Hao P, Crampin S (2006) SWAS: a shear-wave
analysis system for semi-automatic measurement of
shear-wave splitting above small earthquakes. Phys
Earth Planet Inter 159:71–89
Gerst A, Savage MK (2004) Seismic anisotropy beneath
Ruapehu volcano: a possible forecasting tool. Science
306:1543–1547
Liu E, Crampin S (1990) Effects of the internal shear wave
window: comparison with anisotropy induced splitting.
J Geophys Res 95(B7, 11):275–11281
Miller V, Savage MK (2001) Changes in seismic anisotropy
after volcanic eruptions: evidence from Ruapehu.
Science 293:2231–2233
Munson CG, Thurber CH, Li Y, Okubo PG (1995) Crustal
shear wave anisotropy in southern Hawaii: spatial and
temporal analysis. J Geophys Res 100:20367–20377
Musumeci C, Cocina O, De Gori P, Patanè D (2004) Seismological
evidence of stress induced by dike injection
during the 2001 Mt. Etna eruption. Geophys Res Lett
31:L07617. doi:10.1029/2003GL019367
Rosi M, Santacroce R, Sheridan MF (1987) Volcanic
hazard. In: Santacroce R. (ed) Somma-Vesuvius.
Quad Ric Sci 1141:197–234
Saccorotti G, Bianco F, Castellano M, Del Pezzo E
(2001) The July–August 2000 seismic swarms at Campi
Flegrei volcanic complex, Italy. Geophys Res Lett
28:2525–2528
Saccorotti G, Petrosino S, Bianco F, Castellano M,
Galluzzo D, La Rocca M, Del Pezzo E, Zaccarelli L,
Cusano P (2007) Seismicity associated with the 2004–
2006 renewed ground uplift at Campi Flegrei caldera,
Italy. Phys Earth Planet Inter 165(2):14–24
Santacroce R (1983) A general model for the behaviour
of the Somma-Vesuvius volcanic complex. J Volcanol
Geotherm Res 17:237–248
Savage MK, Shih XR, Meyer RC, Aster RC (1989) Shearwave
anisotropy of active tectonic regions via automated
S-wave polarization analysis. Tectonophysics
165:279–292
Savage MK, Peppin WA, Vetter UR (1990) Shear wave
anisotropy and stress direction in and near Long
Valley caldera, California, 1979–1988. J Geophys Res
95:11165–11177
Scandone R, Bellucci F, Lirer L, Rolandi G (1991) The
structure of the Campanian Plain and the activity
of Neapolitan volcanoes. J Volcanol Geotherm Res
48:1–31
Scarpa R, Tronca F, Bianco F, Del Pezzo E (2002) High
resolution velocity structure beneath Mt.Vesuvius from seismic array data. Geophys Res Lett 29(21):
2040. doi:10029/2002GL015576
Troise C, De Natale G, Pingue F, Obrizzo F, De Martino
P, Tammaro U, Boschi E (2007) Renewed ground
uplift at Campi Flegrei caldera (Italy): new insight on
magmatic processes and forecast. Geophys Res Lett
34:L03301. doi:10.1029/2006GL028545
Volti T, Crampin S (2003) A four-year study of shear-wave
splitting in Iceland: 2-Temporal changes before earthquakes
and volcanic eruptions. In: Nieuwland R (ed)
New insights into structural interpretation and modelling.
Geological Society Special Publication 212,
pp 135–149
Zatsepin SV, Crampin S (1997) Modeling the compliance
of crustal rock-I. Response of shear-wave split ting to
differential stress. Geophys J Int 129:477–494
Zollo A, Bernard P (1989) S-wave polarization inversion of
the 15 October 1979, 23:19 imperial valley aftershock:
evidence for anisotropy and a simple source mechanism.
Geophys Res Lett 16:1047–1050
Del Pezzo E, Scarpa R, Iannaccone G (1992)
Seismic investigation of Campi Flegrei Caldera. Volcanic
Seismology, Proceedings of Volcanology Series
III. Springer, New York
Auger E, Gasparini P, Virieux J, Zollo A (2001)
Seismic evidence of an extended magmatic sill under
Mt. Vesuvius. Science 294:1510–1512
Bianco F, Castellano M, Milano G, Vilardo G (1996)
Shear-wave polarization alignment on the eastern
flank of Mt. Etna volcano (Sicily, Italy). Annali di
Geofisica XXXXIX 2:429–443 Bianco F, Castellano M, Milano G, Ventura G, Vilardo
G (1998a) The Somma-Vesuvius stress-field induced
by regional tectonic: evidences from seismological
and mesostructural data. J Volcanol Geotherm Res
82:199–218
Bianco F, Castellano M, Ventura G (1998b) Structural and
seismological features of the 1989 syn-eruptive NNW–
SSE fractures system at Mt. Etna. Geophys Res Lett
25(10):1545–1548
Bianco F, Castellano M, Milano G, Vilardo G, Ferrucci F,
Gresta S (1999) The seismic crisis at Mt. Vesuvius
during 1995 and 1996. Phys Chem Earth 24:977–983
Bianco F, Del Pezzo E, Saccorotti G, Ventura G (2004)
The role of hydrothermal fluids in triggering the July–
August 2000 seismic swarm at Campi Flegrei (Italy):
evidences from seismological and mesostructural data.
J Volcanol Geotherm Res 133:229–246
Bianco F, Scarfì L, Del Pezzo E, Patanè D (2006)
Shear wave splitting changes associated with the 2001
volcanic eruption on Mount Etna. Geophys J Int
167(2):959–967. doi:10.1111/j.1365-246X.2006.03152.x
Bonforte A, Puglisi G (2006) Dynamics of the eastern
flank of Mt. Etna volcano (Italy) investigated by a
dense GPS network. J Volcanol Geotherm Res 153:
357–369
Booth DC, Wyss M, Gillard D (1992) Shear-wave polarization
alignments recorded above the Kaoiki fault zone,
Hawaii. Geophys Res Lett 19:1141–1144
Bousquet JC, Lanzafame G (2004) The tectonics and geodynamics
of Mt. Etna: synthesis and interpretation of
geological and geophysical data. In: Bonaccorso A,
Calvari S, Coltelli M, Del Negro C, Falsaperla S (eds)
Etna Volcano Laboratory. AGU (Geophysical monograph
series), pp 29–47
Chouet B (1996) New methods and future trends in seismological
volcano monitoring. In: Scarpa R, Tilling RI
(eds) Monitoring and mitigation of volcanic hazards.
Springer, New York, pp 23–97
Crampin S (1993)Areview of the effects of crack geometry
on wave propagation through aligned cracks. Can J
Explor Geophys 29:3–17
Crampin S, Zatsepin SV (1997) Modeling the compliance
of crustal rock-II. Response to temporal changes
before earthquakes. Geophys J Int 129:495–506
Crampin S, Gao Y (2006) A review of techniques for measuring
shear-wave splitting above small earthquakes.
Phys Earth Planet Inter 159:1–14
Crampin S, Peacock S, Gao Y, Chastin S (2004) The scatter
of time delays in shear-wave splitting above small
earthquakes. Geophys J Int 156:39–44
Del Pezzo E, Bianco F, Petrosino S, Saccorotti G (2004)
Changes in coda decay rate and shear-wave splitting
parameters associated with seismic swarms at Mt.
Vesuvius, Italy. Bull Seismol Soc Am 94(2):439–452
Di Renzo V, Di Vito MA, Arienzo I, Carandente
A, Civetta L, D’Antonio M, Giordano F, Orsi G,
Tonarini S (2007) Magmatic history of Somma-
Vesuvius on the basis of new geochemical and isotopic
data from a deep borehole (Camaldoli della Torre).
J Petrol 48(4):753–784
Di Vito MA, Isaia R, Orsi G, Southon J, de Vita S,
D’Antonio M, Pappalardo L, Piochi M (1999) Volcanism
and deformation since 12,000 years at the
Campi Flegrei caldera (Italy). J Volcanol Geotherm
Res 91:221–246
Evans JR, Julian BR, Foulger GR, Ross A (1995) Shearwave
splitting from local earthquakes at The Geysers
geothermal field, California. Geophys Res Lett 22:
501–504
Gao Y, Crampin S (2004) Observations of stress relaxation
before earthquakes. Geophys J Int 157:578–582
Gao Y, Hao P, Crampin S (2006) SWAS: a shear-wave
analysis system for semi-automatic measurement of
shear-wave splitting above small earthquakes. Phys
Earth Planet Inter 159:71–89
Gerst A, Savage MK (2004) Seismic anisotropy beneath
Ruapehu volcano: a possible forecasting tool. Science
306:1543–1547
Liu E, Crampin S (1990) Effects of the internal shear wave
window: comparison with anisotropy induced splitting.
J Geophys Res 95(B7, 11):275–11281
Miller V, Savage MK (2001) Changes in seismic anisotropy
after volcanic eruptions: evidence from Ruapehu.
Science 293:2231–2233
Munson CG, Thurber CH, Li Y, Okubo PG (1995) Crustal
shear wave anisotropy in southern Hawaii: spatial and
temporal analysis. J Geophys Res 100:20367–20377
Musumeci C, Cocina O, De Gori P, Patanè D (2004) Seismological
evidence of stress induced by dike injection
during the 2001 Mt. Etna eruption. Geophys Res Lett
31:L07617. doi:10.1029/2003GL019367
Rosi M, Santacroce R, Sheridan MF (1987) Volcanic
hazard. In: Santacroce R. (ed) Somma-Vesuvius.
Quad Ric Sci 1141:197–234
Saccorotti G, Bianco F, Castellano M, Del Pezzo E
(2001) The July–August 2000 seismic swarms at Campi
Flegrei volcanic complex, Italy. Geophys Res Lett
28:2525–2528
Saccorotti G, Petrosino S, Bianco F, Castellano M,
Galluzzo D, La Rocca M, Del Pezzo E, Zaccarelli L,
Cusano P (2007) Seismicity associated with the 2004–
2006 renewed ground uplift at Campi Flegrei caldera,
Italy. Phys Earth Planet Inter 165(2):14–24
Santacroce R (1983) A general model for the behaviour
of the Somma-Vesuvius volcanic complex. J Volcanol
Geotherm Res 17:237–248
Savage MK, Shih XR, Meyer RC, Aster RC (1989) Shearwave
anisotropy of active tectonic regions via automated
S-wave polarization analysis. Tectonophysics
165:279–292
Savage MK, Peppin WA, Vetter UR (1990) Shear wave
anisotropy and stress direction in and near Long
Valley caldera, California, 1979–1988. J Geophys Res
95:11165–11177
Scandone R, Bellucci F, Lirer L, Rolandi G (1991) The
structure of the Campanian Plain and the activity
of Neapolitan volcanoes. J Volcanol Geotherm Res
48:1–31
Scarpa R, Tronca F, Bianco F, Del Pezzo E (2002) High
resolution velocity structure beneath Mt.Vesuvius from seismic array data. Geophys Res Lett 29(21):
2040. doi:10029/2002GL015576
Troise C, De Natale G, Pingue F, Obrizzo F, De Martino
P, Tammaro U, Boschi E (2007) Renewed ground
uplift at Campi Flegrei caldera (Italy): new insight on
magmatic processes and forecast. Geophys Res Lett
34:L03301. doi:10.1029/2006GL028545
Volti T, Crampin S (2003) A four-year study of shear-wave
splitting in Iceland: 2-Temporal changes before earthquakes
and volcanic eruptions. In: Nieuwland R (ed)
New insights into structural interpretation and modelling.
Geological Society Special Publication 212,
pp 135–149
Zatsepin SV, Crampin S (1997) Modeling the compliance
of crustal rock-I. Response of shear-wave split ting to
differential stress. Geophys J Int 129:477–494
Zollo A, Bernard P (1989) S-wave polarization inversion of
the 15 October 1979, 23:19 imperial valley aftershock:
evidence for anisotropy and a simple source mechanism.
Geophys Res Lett 16:1047–1050
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