Hypocenters calculation for volcanic earthquakes associated with movement of fluid in the Galeras volcano, Colombia
One of the most important tasks in the volcanic seismology is the location of the seismic sources. Given the difficulty of identification of the seismic phases and the measurement of its arrival times, an algorithm develops for the determination of the hypocenter of these earthquakes based on the at...
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| Format: | Online |
| Language: | spa |
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Universidad Pedagógica y Tecnológica de Colombia - UPTC
2009
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| Subjects: | |
| Online Access: | https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/891 |
| _version_ | 1801706678098329600 |
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| author | Torres-Corredor, Roberto Armando Cadena-Ibarra, Oscar Ernesto |
| author_facet | Torres-Corredor, Roberto Armando Cadena-Ibarra, Oscar Ernesto |
| author_sort | Torres-Corredor, Roberto Armando |
| collection | OJS |
| description | One of the most important tasks in the volcanic seismology is the location of the seismic sources. Given the difficulty of identification of the seismic phases and the measurement of its arrival times, an algorithm develops for the determination of the hypocenter of these earthquakes based on the attenuation of the extents of the waveforms and the application of Gauss-Newton's method. The basic principle is the calculation of the hypocentral parameters of the earthquake by means of the simultaneous minimization of the residual ones of the extents of the waveforms from several observations. The method uses an adjustment of square minimums developed in a series of Taylor in its first approximation. It is considered to be a variation of the hypocentral parameters of an initial supposed location (initial model) and those have to by means of an iterative procedure minimize simultaneously the residues of the calculated extents and the observed ones of the records in a network of seismic stations. The investment of the extents to estimate the location of the seismic source is supported in a physical model of attenuation that describes the relation between the amplitudes and parameters of the source, taking into account the geometric amplitude, anelastic absorption, orientation of the seismometer components, effects of free surface and topography. The convergence of the solution strongly depends on the proximity of the initial model suppositions with reality. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-891 |
| institution | Revista Ingeniería, Investigación y Desarrollo |
| language | spa |
| publishDate | 2009 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia - UPTC |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-8912017-09-07T23:40:18Z Hypocenters calculation for volcanic earthquakes associated with movement of fluid in the Galeras volcano, Colombia Cálculo de hipocentros para sismos volcánicos asociados a movimiento de fluido en el volcán Galeras, Colombia Torres-Corredor, Roberto Armando Cadena-Ibarra, Oscar Ernesto earthquakes of long period tremor hypocenters attenuation sismos de largo período tremor hipocentros atenuación One of the most important tasks in the volcanic seismology is the location of the seismic sources. Given the difficulty of identification of the seismic phases and the measurement of its arrival times, an algorithm develops for the determination of the hypocenter of these earthquakes based on the attenuation of the extents of the waveforms and the application of Gauss-Newton's method. The basic principle is the calculation of the hypocentral parameters of the earthquake by means of the simultaneous minimization of the residual ones of the extents of the waveforms from several observations. The method uses an adjustment of square minimums developed in a series of Taylor in its first approximation. It is considered to be a variation of the hypocentral parameters of an initial supposed location (initial model) and those have to by means of an iterative procedure minimize simultaneously the residues of the calculated extents and the observed ones of the records in a network of seismic stations. The investment of the extents to estimate the location of the seismic source is supported in a physical model of attenuation that describes the relation between the amplitudes and parameters of the source, taking into account the geometric amplitude, anelastic absorption, orientation of the seismometer components, effects of free surface and topography. The convergence of the solution strongly depends on the proximity of the initial model suppositions with reality. Una de las tareas más importantes en la sismología volcánica es la localización de las fuentes sísmicas. Dada la dificultad de identificación de las fases sísmicas y la medición de sus tiempos de llegada, se desarrolla un algoritmo para la determinación del hipocentro de estos sismos, fundamentado en la atenuación de las amplitudes de las formas de onda y la aplicación del método de Gauss-Newton. El principio básico es el cálculo de los parámetros hipocentrales del sismo mediante la minimización simultánea de los residuales de las amplitudes de las formas de onda a partir de varias observaciones. El método utiliza un ajuste de mínimos cuadrados desarrollados en una serie de Taylor en su primera aproximación. Se considera una variación de los parámetros hipocentrales de una ubicación inicial supuesta (modelo inicial) y que deben mediante un procedimiento iterativo minimizar simultáneamente los residuos de las amplitudes calculadas y las observadas de los registros en una red de estaciones sísmicas. La inversión de las amplitudes para estimar la localización de la fuente sísmica se soporta en un modelo físico de atenuación que describe la relación entre las amplitudes y los parámetros de la fuente, teniendo en cuenta la expansión geométrica, absorción anelástica, orientación de las componentes de los sismómetros, efectos de superficie libre y topografía. La convergencia de la solución depende fuertemente de la aproximación de los supuestos del modelo inicial con la realidad. Universidad Pedagógica y Tecnológica de Colombia - UPTC 2009-07-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/891 Ingeniería Investigación y Desarrollo; Vol. 8 No. 1: enero-junio de 2009; 20-23 Ingeniería Investigación y Desarrollo; Vol. 8 Núm. 1: enero-junio de 2009; 20-23 2422-4324 1900-771X spa https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/891/890 Derechos de autor 2009 Ingeniería Investigación y Desarrollo |
| spellingShingle | earthquakes of long period tremor hypocenters attenuation sismos de largo período tremor hipocentros atenuación Torres-Corredor, Roberto Armando Cadena-Ibarra, Oscar Ernesto Hypocenters calculation for volcanic earthquakes associated with movement of fluid in the Galeras volcano, Colombia |
| title | Hypocenters calculation for volcanic earthquakes associated with movement of fluid in the Galeras volcano, Colombia |
| title_alt | Cálculo de hipocentros para sismos volcánicos asociados a movimiento de fluido en el volcán Galeras, Colombia |
| title_full | Hypocenters calculation for volcanic earthquakes associated with movement of fluid in the Galeras volcano, Colombia |
| title_fullStr | Hypocenters calculation for volcanic earthquakes associated with movement of fluid in the Galeras volcano, Colombia |
| title_full_unstemmed | Hypocenters calculation for volcanic earthquakes associated with movement of fluid in the Galeras volcano, Colombia |
| title_short | Hypocenters calculation for volcanic earthquakes associated with movement of fluid in the Galeras volcano, Colombia |
| title_sort | hypocenters calculation for volcanic earthquakes associated with movement of fluid in the galeras volcano colombia |
| topic | earthquakes of long period tremor hypocenters attenuation sismos de largo período tremor hipocentros atenuación |
| topic_facet | earthquakes of long period tremor hypocenters attenuation sismos de largo período tremor hipocentros atenuación |
| url | https://revistas.uptc.edu.co/index.php/ingenieria_sogamoso/article/view/891 |
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