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Conduit Resonance Models for Long-Period Seismicity at Galeras Volcano (Colombia), During 2004–2010

Cadena, Óscar E. Y Sánchez, John J. (2022) Conduit Resonance Models for Long-Period Seismicity at Galeras Volcano (Colombia), During 2004–2010. Journal of South American Earth Sciences, 113. p. 103661. ISSN 0895-9811

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This study analyzes the long-period (LP) seismicity of Galeras volcano from the period 2004–2010, based on resonance models of a magma column. In this model an initial disturbance is propagated through the magma column’s walls in the form of waves until it reaches a receiver located on the surface. The input parameters for the crust and magma were obtained from previous studies, and the solution of the systems of equations was found using a finite element method. Models for two groups of LP events were found: group G1 associated with the emplacement of the lava domes in 2006 and 2008, and group G2 related to the seismicity preceding the emplacement of these domes. Group G1 is modeled by the resonance of a magma column about 2800 m long with its top near the surface and group G2 is related to a column close to 2000 m in length. The main frequency of initial perturbation differs between the groups. Additionally, the results of this study cast doubt on the effec­tiveness of location methods of fluid-related seismicity based on amplitude attenuation.

Tipo de Elemento: Artículo
Palabras Clave: Resonance conduit Galeras volcano Magma Long-period seismicity Finite element method
Asunto: Q Ciencias > QC Physics
Division: Facultad de Ciencias Exactas y Naturales > Programa de Física > Productividad
Depósito de Usuario: PhD Oscar Ernesto Cadena Ibarra
Fecha Deposito: 19 May 2022 21:29
Ultima Modificación: 19 May 2022 21:31

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