Scattering images from autocorrelation functions of P-wave seismic velocity images

the case of Tenerife Island (Canary Islands, Spain)

A. Garcia-Yeguas, A. Sánchez-Alzola, L. de Siena, J. Prudencio, A. Diaz-Moreno, J. M. Ibáñez

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Abstract

We present a P-wave scattering image of the volcanic structures under Tenerife Island using the autocorrelation functions of P-wave vertical velocity fluctuations. We have applied a cluster analysis to total quality factor attenuation ( Q−1tQt−1 ) and scattering quality factor attenuation ( Q−1PScQPSc−1 ) images to interpret the structures in terms of intrinsic and scattering attenuation variations on a 2D plane, corresponding to a depth of 2000 m, and check the robustness of the scattering imaging. The results show that scattering patterns are similar to total attenuation patterns in the south of the island. There are two main areas where patterns differ: at Cañadas-Teide-Pico Viejo Complex, high total attenuation and average-to-low scattering values are observed. We interpret the difference as induced by intrinsic attenuation. In the Santiago Ridge Zone (SRZ) region, high scattering values correspond to average total attenuation. In our interpretation, the anomaly is induced by an extended scatterer, geometrically related to the surficial traces of Garachico and El Chinyero historical eruptions and the area of highest seismic activity during the 2004–2008 seismic crises.
Original languageEnglish
Article number24
JournalBulletin of Volcanology
Volume80
Early online date17 Feb 2018
DOIs
Publication statusPublished - Mar 2018

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Seismic waves
seismic velocity
Autocorrelation
autocorrelation
P-wave
wave velocity
scattering
Scattering
wave scattering
Cluster analysis
cluster analysis
volcanic eruption
anomaly
Imaging techniques

Keywords

  • P-wave scattering images
  • Canary Islands
  • velocity and attenuation seismic tomography
  • autocorrelation functions

Cite this

Scattering images from autocorrelation functions of P-wave seismic velocity images : the case of Tenerife Island (Canary Islands, Spain). / Garcia-Yeguas, A.; Sánchez-Alzola, A.; de Siena, L.; Prudencio, J.; Diaz-Moreno, A.; Ibáñez, J. M.

In: Bulletin of Volcanology, Vol. 80, 24, 03.2018.

Research output: Contribution to journalArticle

Garcia-Yeguas, A. ; Sánchez-Alzola, A. ; de Siena, L. ; Prudencio, J. ; Diaz-Moreno, A. ; Ibáñez, J. M. / Scattering images from autocorrelation functions of P-wave seismic velocity images : the case of Tenerife Island (Canary Islands, Spain). In: Bulletin of Volcanology. 2018 ; Vol. 80.
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title = "Scattering images from autocorrelation functions of P-wave seismic velocity images: the case of Tenerife Island (Canary Islands, Spain)",
abstract = "We present a P-wave scattering image of the volcanic structures under Tenerife Island using the autocorrelation functions of P-wave vertical velocity fluctuations. We have applied a cluster analysis to total quality factor attenuation ( Q−1tQt−1 ) and scattering quality factor attenuation ( Q−1PScQPSc−1 ) images to interpret the structures in terms of intrinsic and scattering attenuation variations on a 2D plane, corresponding to a depth of 2000 m, and check the robustness of the scattering imaging. The results show that scattering patterns are similar to total attenuation patterns in the south of the island. There are two main areas where patterns differ: at Ca{\~n}adas-Teide-Pico Viejo Complex, high total attenuation and average-to-low scattering values are observed. We interpret the difference as induced by intrinsic attenuation. In the Santiago Ridge Zone (SRZ) region, high scattering values correspond to average total attenuation. In our interpretation, the anomaly is induced by an extended scatterer, geometrically related to the surficial traces of Garachico and El Chinyero historical eruptions and the area of highest seismic activity during the 2004–2008 seismic crises.",
keywords = "P-wave scattering images, Canary Islands, velocity and attenuation seismic tomography, autocorrelation functions",
author = "A. Garcia-Yeguas and A. S{\'a}nchez-Alzola and {de Siena}, L. and J. Prudencio and A. Diaz-Moreno and Ib{\'a}{\~n}ez, {J. M.}",
note = "We thank Edoardo Del Pezzo for the valuable idea of this paper and suggestions regarding the methodology. J. Prudencio is partially supported by NSF1521855 Hazard SEES project. This paper has been partially supported by the Spanish project KNOWAVES (TEC2015-68752-R (MINECO/FEDER)), the European project MED-SUV funded by the European Union’s Seventh Framework Program for research, technological development and demonstration under Grant Agreement No 308665, and by the Regional project ‘Grupo de Investigaci{\'o}n en Geof{\'i}sica y Sismolog{\'i}a de la Junta de Andaluc{\'i}a, RNM104’.",
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T1 - Scattering images from autocorrelation functions of P-wave seismic velocity images

T2 - the case of Tenerife Island (Canary Islands, Spain)

AU - Garcia-Yeguas, A.

AU - Sánchez-Alzola, A.

AU - de Siena, L.

AU - Prudencio, J.

AU - Diaz-Moreno, A.

AU - Ibáñez, J. M.

N1 - We thank Edoardo Del Pezzo for the valuable idea of this paper and suggestions regarding the methodology. J. Prudencio is partially supported by NSF1521855 Hazard SEES project. This paper has been partially supported by the Spanish project KNOWAVES (TEC2015-68752-R (MINECO/FEDER)), the European project MED-SUV funded by the European Union’s Seventh Framework Program for research, technological development and demonstration under Grant Agreement No 308665, and by the Regional project ‘Grupo de Investigación en Geofísica y Sismología de la Junta de Andalucía, RNM104’.

PY - 2018/3

Y1 - 2018/3

N2 - We present a P-wave scattering image of the volcanic structures under Tenerife Island using the autocorrelation functions of P-wave vertical velocity fluctuations. We have applied a cluster analysis to total quality factor attenuation ( Q−1tQt−1 ) and scattering quality factor attenuation ( Q−1PScQPSc−1 ) images to interpret the structures in terms of intrinsic and scattering attenuation variations on a 2D plane, corresponding to a depth of 2000 m, and check the robustness of the scattering imaging. The results show that scattering patterns are similar to total attenuation patterns in the south of the island. There are two main areas where patterns differ: at Cañadas-Teide-Pico Viejo Complex, high total attenuation and average-to-low scattering values are observed. We interpret the difference as induced by intrinsic attenuation. In the Santiago Ridge Zone (SRZ) region, high scattering values correspond to average total attenuation. In our interpretation, the anomaly is induced by an extended scatterer, geometrically related to the surficial traces of Garachico and El Chinyero historical eruptions and the area of highest seismic activity during the 2004–2008 seismic crises.

AB - We present a P-wave scattering image of the volcanic structures under Tenerife Island using the autocorrelation functions of P-wave vertical velocity fluctuations. We have applied a cluster analysis to total quality factor attenuation ( Q−1tQt−1 ) and scattering quality factor attenuation ( Q−1PScQPSc−1 ) images to interpret the structures in terms of intrinsic and scattering attenuation variations on a 2D plane, corresponding to a depth of 2000 m, and check the robustness of the scattering imaging. The results show that scattering patterns are similar to total attenuation patterns in the south of the island. There are two main areas where patterns differ: at Cañadas-Teide-Pico Viejo Complex, high total attenuation and average-to-low scattering values are observed. We interpret the difference as induced by intrinsic attenuation. In the Santiago Ridge Zone (SRZ) region, high scattering values correspond to average total attenuation. In our interpretation, the anomaly is induced by an extended scatterer, geometrically related to the surficial traces of Garachico and El Chinyero historical eruptions and the area of highest seismic activity during the 2004–2008 seismic crises.

KW - P-wave scattering images

KW - Canary Islands

KW - velocity and attenuation seismic tomography

KW - autocorrelation functions

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M3 - Article

VL - 80

JO - Bulletin of Volcanology

JF - Bulletin of Volcanology

SN - 1432-0819

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ER -