Ambient Seismic Noise Image of the Structurally Controlled Heat and Fluid Feeder Pathway at Campi Flegrei Caldera

L. de Siena; C. Sammarco; D. G. Cornwell; M. La Rocca; F. Bianco; L. Zaccarelli; H. Nakahara

doi:10.1029/2018GL078817

Ambient Seismic Noise Image of the Structurally Controlled Heat and Fluid Feeder Pathway at Campi Flegrei Caldera

L. de Siena, C. Sammarco, D. G. Cornwell, M. La Rocca, F. Bianco, L. Zaccarelli, H. Nakahara

Research output: Contribution to journal › Article

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Abstract

Earthquakes at Campi Flegrei have been low-magnitude and sparse since 1985, denying on-shore monitoring observations of their usual source for structural constraint: seismic tomography. Here, we used continuous seismic records
from 2011-13 to reconstruct period-dependent Rayleigh-wave group-velocity maps of the volcano. The Neapolitan Yellow Tuff rim faults bound high-velocity intra-crater products of historical eruptions, which act as a barrier for deep fluid migration. The anomaly with lowest group velocity is aseismic and corresponds
to the portion of a fluid-storage zone that was fractured during the 1984 volcanic unrest under Pozzuoli town. Earthquake locations show that fluids migrate from this area towards the Solfatara and Pisciarelli fumaroles along shallower low-velocity fractures. The aseismic anomaly is likely fed by a deep-seated offshore magmatic source. Its spatial relation with regional dynamics and observations from historical unrests mark the area as the most likely feeder
pathway for fluid and magmatic inputs from depth.

Original language	English
Pages (from-to)	6428-6436
Number of pages	9
Journal	Geophysical Research Letters
Volume	45
Issue number	13
Early online date	5 Jul 2018
DOIs	https://doi.org/10.1029/2018GL078817
Publication status	Published - 16 Jul 2018

Keywords

Ambient noise imaging
Volcano imaging
Fluid Propagation
Seismicity
Volcano dynamics
Seismic scattering

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Ambient Seismic Noise Image of the Structurally Controlled Heat and Fluid Feeder Pathway at Campi Flegrei Caldera
© 2018. American Geophysical Union
Final published version, 1.47 MBLicence: Other

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de Siena, L., Sammarco, C., Cornwell, D. G., La Rocca, M., Bianco, F., Zaccarelli, L., & Nakahara, H. (2018). Ambient Seismic Noise Image of the Structurally Controlled Heat and Fluid Feeder Pathway at Campi Flegrei Caldera. Geophysical Research Letters, 45(13), 6428-6436. https://doi.org/10.1029/2018GL078817

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title = "Ambient Seismic Noise Image of the Structurally Controlled Heat and Fluid Feeder Pathway at Campi Flegrei Caldera",

abstract = "Earthquakes at Campi Flegrei have been low-magnitude and sparse since 1985, denying on-shore monitoring observations of their usual source for structural constraint: seismic tomography. Here, we used continuous seismic recordsfrom 2011-13 to reconstruct period-dependent Rayleigh-wave group-velocity maps of the volcano. The Neapolitan Yellow Tuff rim faults bound high-velocity intra-crater products of historical eruptions, which act as a barrier for deep fluid migration. The anomaly with lowest group velocity is aseismic and correspondsto the portion of a fluid-storage zone that was fractured during the 1984 volcanic unrest under Pozzuoli town. Earthquake locations show that fluids migrate from this area towards the Solfatara and Pisciarelli fumaroles along shallower low-velocity fractures. The aseismic anomaly is likely fed by a deep-seated offshore magmatic source. Its spatial relation with regional dynamics and observations from historical unrests mark the area as the most likely feederpathway for fluid and magmatic inputs from depth.",

keywords = "Ambient noise imaging, Volcano imaging, Fluid Propagation, Seismicity, Volcano dynamics, Seismic scattering",

author = "{de Siena}, L. and C. Sammarco and Cornwell, {D. G.} and {La Rocca}, M. and F. Bianco and L. Zaccarelli and H. Nakahara",

note = "The TIDES-COST Action (STSM-ES1401-34011) provided a travel grant to framework the research project. The Japan Society for the Promotion of Science - Short-Term Fellowship (JSPS/OF215/022) financed the work, undertaken at Tohoku University and concluded at the University of Aberdeen. We thank Giuseppe Vilardo and Eliana Bellucci Sessa for providing the geomorphological maps, and Simona Petrosino and Paola Cusano for the P- and S-wave pickings used to localise the seismicity. Informal revisions from Guido Ventura, Nick Rawlinson and Chris Kilburn helped us improving the analyses and interpretation, respectively. We acknowledge the help of Naveed Khan in parallelising the codes and two anonymous reviewers who improved the analysis, interpretation, and readibility with their comments. All data to reproduce the maps can be downloaded from the World Data Center PANGAEA data repository, permanent link https://doi.pangaea.de/10.1594/PANGAEA.890238.",

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AU - Sammarco, C.

AU - Cornwell, D. G.

AU - La Rocca, M.

AU - Bianco, F.

AU - Zaccarelli, L.

AU - Nakahara, H.

N1 - The TIDES-COST Action (STSM-ES1401-34011) provided a travel grant to framework the research project. The Japan Society for the Promotion of Science - Short-Term Fellowship (JSPS/OF215/022) financed the work, undertaken at Tohoku University and concluded at the University of Aberdeen. We thank Giuseppe Vilardo and Eliana Bellucci Sessa for providing the geomorphological maps, and Simona Petrosino and Paola Cusano for the P- and S-wave pickings used to localise the seismicity. Informal revisions from Guido Ventura, Nick Rawlinson and Chris Kilburn helped us improving the analyses and interpretation, respectively. We acknowledge the help of Naveed Khan in parallelising the codes and two anonymous reviewers who improved the analysis, interpretation, and readibility with their comments. All data to reproduce the maps can be downloaded from the World Data Center PANGAEA data repository, permanent link https://doi.pangaea.de/10.1594/PANGAEA.890238.

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Y1 - 2018/7/16

N2 - Earthquakes at Campi Flegrei have been low-magnitude and sparse since 1985, denying on-shore monitoring observations of their usual source for structural constraint: seismic tomography. Here, we used continuous seismic recordsfrom 2011-13 to reconstruct period-dependent Rayleigh-wave group-velocity maps of the volcano. The Neapolitan Yellow Tuff rim faults bound high-velocity intra-crater products of historical eruptions, which act as a barrier for deep fluid migration. The anomaly with lowest group velocity is aseismic and correspondsto the portion of a fluid-storage zone that was fractured during the 1984 volcanic unrest under Pozzuoli town. Earthquake locations show that fluids migrate from this area towards the Solfatara and Pisciarelli fumaroles along shallower low-velocity fractures. The aseismic anomaly is likely fed by a deep-seated offshore magmatic source. Its spatial relation with regional dynamics and observations from historical unrests mark the area as the most likely feederpathway for fluid and magmatic inputs from depth.

AB - Earthquakes at Campi Flegrei have been low-magnitude and sparse since 1985, denying on-shore monitoring observations of their usual source for structural constraint: seismic tomography. Here, we used continuous seismic recordsfrom 2011-13 to reconstruct period-dependent Rayleigh-wave group-velocity maps of the volcano. The Neapolitan Yellow Tuff rim faults bound high-velocity intra-crater products of historical eruptions, which act as a barrier for deep fluid migration. The anomaly with lowest group velocity is aseismic and correspondsto the portion of a fluid-storage zone that was fractured during the 1984 volcanic unrest under Pozzuoli town. Earthquake locations show that fluids migrate from this area towards the Solfatara and Pisciarelli fumaroles along shallower low-velocity fractures. The aseismic anomaly is likely fed by a deep-seated offshore magmatic source. Its spatial relation with regional dynamics and observations from historical unrests mark the area as the most likely feederpathway for fluid and magmatic inputs from depth.

KW - Ambient noise imaging

KW - Volcano imaging

KW - Fluid Propagation

KW - Seismicity

KW - Volcano dynamics

KW - Seismic scattering

U2 - 10.1029/2018GL078817

DO - 10.1029/2018GL078817

M3 - Article

VL - 45

SP - 6428

EP - 6436

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

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ER -