Seismotectonic characterization of the Colombian Pacific region: identification of tectonic patterns through geostatistical analysis

Earthquake occurrence is a consequence of many processes within the Earth such as tectonic stress loading, fluid diffusion or static stress triggering. As a result of this, patterns of spatial and temporal distribution, that earthquakes have historically displayed, keep the footprint of the mechanis...

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Autores:
Gracia Suárez, María Daniela
Tipo de recurso:
Trabajo de grado de pregrado
Fecha de publicación:
2017
Institución:
Universidad de los Andes
Repositorio:
Séneca: repositorio Uniandes
Idioma:
eng
OAI Identifier:
oai:repositorio.uniandes.edu.co:1992/39968
Acceso en línea:
http://hdl.handle.net/1992/39968
Palabra clave:
Terremotos
Sismología
Geología
Geociencias
Rights
openAccess
License
http://creativecommons.org/licenses/by-nc-sa/4.0/
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dc.title.es_CO.fl_str_mv Seismotectonic characterization of the Colombian Pacific region: identification of tectonic patterns through geostatistical analysis
title Seismotectonic characterization of the Colombian Pacific region: identification of tectonic patterns through geostatistical analysis
spellingShingle Seismotectonic characterization of the Colombian Pacific region: identification of tectonic patterns through geostatistical analysis
Terremotos
Sismología
Geología
Geociencias
title_short Seismotectonic characterization of the Colombian Pacific region: identification of tectonic patterns through geostatistical analysis
title_full Seismotectonic characterization of the Colombian Pacific region: identification of tectonic patterns through geostatistical analysis
title_fullStr Seismotectonic characterization of the Colombian Pacific region: identification of tectonic patterns through geostatistical analysis
title_full_unstemmed Seismotectonic characterization of the Colombian Pacific region: identification of tectonic patterns through geostatistical analysis
title_sort Seismotectonic characterization of the Colombian Pacific region: identification of tectonic patterns through geostatistical analysis
dc.creator.fl_str_mv Gracia Suárez, María Daniela
dc.contributor.advisor.none.fl_str_mv Iwashita, Fabio
Tary, Jean Baptiste
dc.contributor.author.none.fl_str_mv Gracia Suárez, María Daniela
dc.contributor.jury.none.fl_str_mv Giraldo, Ramón
dc.subject.keyword.es_CO.fl_str_mv Terremotos
Sismología
Geología
topic Terremotos
Sismología
Geología
Geociencias
dc.subject.themes.none.fl_str_mv Geociencias
description Earthquake occurrence is a consequence of many processes within the Earth such as tectonic stress loading, fluid diffusion or static stress triggering. As a result of this, patterns of spatial and temporal distribution, that earthquakes have historically displayed, keep the footprint of the mechanisms that give them origin. Quantifying these patterns and the extent of the causality and correlation between seismic events is then an interesting and useful subject of study. It is useful because it opens the doors to more accurate estimations of the behavior of earthquakes, which inherently decreases the risk of catastrophes. The Colombian Pacific region is a zone that presents a high degree of geological complexity, it lies parallel to a trench where the Nazca plate subducts below the South American Plate, which inherently results in increased seismic activity and rupture. In this study a sequence of 134 events that happened in this zone in a period of 68 months is studied. These earthquakes are organized in complex spatial structures that were separated trough clustering analysis and then subjected to geostatistical analysis. The geostatistical analysis consisted of: an evaluation of the distribution of events as a function of time and a semivariogram analysis, by which the degree of correlation between events was studied. The interaction within these events is highly complex but, to some extent, some system wide correlations are observed. As opposed to what was initially expected, the semivariogram analysis did not manage to measure the degree of correlation for this particular sequence. What this means is that all semivariograms lie within a zone that denotes no-correlation and present a generalized uncorrelated form
publishDate 2017
dc.date.issued.none.fl_str_mv 2017
dc.date.accessioned.none.fl_str_mv 2020-06-10T16:42:10Z
dc.date.available.none.fl_str_mv 2020-06-10T16:42:10Z
dc.type.spa.fl_str_mv Trabajo de grado - Pregrado
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identifier_str_mv u807526.pdf
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dc.format.extent.es_CO.fl_str_mv 75 hojas
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dc.publisher.es_CO.fl_str_mv Universidad de los Andes
dc.publisher.program.es_CO.fl_str_mv Geociencias
dc.publisher.faculty.es_CO.fl_str_mv Facultad de Ciencias
dc.publisher.department.es_CO.fl_str_mv Departamento de Geociencias
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spelling Al consultar y hacer uso de este recurso, está aceptando las condiciones de uso establecidas por los autores.http://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Iwashita, Fabio555c8e3c-97ed-43b7-8752-9fb1ff793414600Tary, Jean Baptistee1d1da9c-3dd7-44c8-98d9-3743392b02fe600Gracia Suárez, María Danielaac630e5b-fe22-4dfc-b01e-ed92dd764350600Giraldo, Ramón2020-06-10T16:42:10Z2020-06-10T16:42:10Z2017http://hdl.handle.net/1992/39968u807526.pdfinstname:Universidad de los Andesreponame:Repositorio Institucional Sénecarepourl:https://repositorio.uniandes.edu.co/Earthquake occurrence is a consequence of many processes within the Earth such as tectonic stress loading, fluid diffusion or static stress triggering. As a result of this, patterns of spatial and temporal distribution, that earthquakes have historically displayed, keep the footprint of the mechanisms that give them origin. Quantifying these patterns and the extent of the causality and correlation between seismic events is then an interesting and useful subject of study. It is useful because it opens the doors to more accurate estimations of the behavior of earthquakes, which inherently decreases the risk of catastrophes. The Colombian Pacific region is a zone that presents a high degree of geological complexity, it lies parallel to a trench where the Nazca plate subducts below the South American Plate, which inherently results in increased seismic activity and rupture. In this study a sequence of 134 events that happened in this zone in a period of 68 months is studied. These earthquakes are organized in complex spatial structures that were separated trough clustering analysis and then subjected to geostatistical analysis. The geostatistical analysis consisted of: an evaluation of the distribution of events as a function of time and a semivariogram analysis, by which the degree of correlation between events was studied. The interaction within these events is highly complex but, to some extent, some system wide correlations are observed. As opposed to what was initially expected, the semivariogram analysis did not manage to measure the degree of correlation for this particular sequence. What this means is that all semivariograms lie within a zone that denotes no-correlation and present a generalized uncorrelated formLa ocurrencia de terremotos es la consecuencia de los múltiples procesos que ocurren en el interior de la Tierra como lo son la carga tectónica por esfuerzo, la difusión de fluidos o el desencadenamiento por esfuerzo estático. Como resultado de esto, los patrones de distribución espacial y temporal que los terremotos han mostrado históricamente guardan la huella de los mecanismos que los originan. Cuantificar dichos patrones y la extensión de la causalidad y correlación entre eventos sísmicos es por lo tanto una materia de estudio útil e interesante. Es útil ya que abre las puertas a un área de estudio donde las estimaciones del comportamiento de los terremotos adquieren mayor precisión, lo cual inherentemente reduce el riesgo de catástrofes. La región Pacífica de Colombia es una zona que presenta un alto grado de complejidad en su geología, yace paralela a una trinchera donde la placa Nazca subduce por debajo de la placa Sur Americana, lo que automáticamente resulta en una mayor actividad sísmica y en ruptura. En este estudio se considera una secuencia de 134 eventos que ocurrieron en esta zona en un periodo de 68 meses. Estos terremotos se organizan en estructuras espaciales complejas, dichas estructuras fueron separadas por medio de análisis de clusters y luego analizadas usando métodos geoestadísticos. El análisis geoestadístico consistió de: La evaluación de la distribución de los eventos como función del tiempo y un análisis de semivariogramas, por medio del cual el grado de correlación entre los eventos fue estudiado. La interacción entre los eventos estudiados es de alta complejidad, sin embargo, hasta cierto punto es posible observar correlaciones a lo largo de todo el sistema. A diferencia de lo que se esperaba, el análisis por medio de semivariogramas no logró medir el grado de correlación para esta secuencia particular. Lo que esto significa es que todos los semivariogramas experimentales obtenidos se encuentran dentro de una zona que denota ausencia de correlación y en general presentan una forma que no muestra relación entre la causalidad de los eventosGeocientíficoPregrado75 hojasapplication/pdfengUniversidad de los AndesGeocienciasFacultad de CienciasDepartamento de Geocienciasinstname:Universidad de los Andesreponame:Repositorio Institucional SénecaSeismotectonic characterization of the Colombian Pacific region: identification of tectonic patterns through geostatistical analysisTrabajo de grado - Pregradoinfo:eu-repo/semantics/bachelorThesishttp://purl.org/coar/resource_type/c_7a1fhttp://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/TPTerremotosSismologíaGeologíaGeocienciasPublicationTEXTu807526.pdf.txtu807526.pdf.txtExtracted texttext/plain106323https://repositorio.uniandes.edu.co/bitstreams/bb1dfdd2-afbe-43a8-a281-1883f787f7fe/download11b6f6691f7f093d166974d54c0e1b0dMD54ORIGINALu807526.pdfapplication/pdf1758261https://repositorio.uniandes.edu.co/bitstreams/ebc4344e-077d-4cef-96f7-a3633bb42aca/download7b907a5e1738954e8c5931394ae438ceMD51THUMBNAILu807526.pdf.jpgu807526.pdf.jpgIM Thumbnailimage/jpeg8938https://repositorio.uniandes.edu.co/bitstreams/a4f41d57-5fc6-4d6e-b872-e24ac74eb823/download722fba98fd906a53afd738e1d5891aa3MD551992/39968oai:repositorio.uniandes.edu.co:1992/399682023-10-10 16:45:56.875http://creativecommons.org/licenses/by-nc-sa/4.0/open.accesshttps://repositorio.uniandes.edu.coRepositorio institucional Sénecaadminrepositorio@uniandes.edu.co