Person: Charco Romero, María
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First Name
María
Last Name
Charco Romero
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Matemáticas
Department
Area
Física de la Tierra
Identifiers
7 results
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Now showing 1 - 7 of 7
Item Modelización de la deformación y variaciones de gravedad causadas por actividad volcánica(2004) Charco Romero, María; Fernández Torres, José; Luzón Martínez, FranciscoEl objetivo de esta memoria es el estudio de la influencia del campo gravitatorio y la topografía del terreno en el modelado e interpretación de deformaciones y variaciones de gravedad. Tras realizar una introducción de los modelos empleados habitualmente en la interpretación de deformaciones y variaciones de gravedad, se describe brevemente el modelo elástico-gravitatorio. Mediante este modelo se pueden calcular de forma simultánea desplazamientos y variaciones de gravedad. El análisis dimensional de sus ecuaciones muestra la importancia de incluir el campo gravitatorio en el modelado. La consecuencia principal que se extrae de este análisis es que para la interpretación conjunta de deformaciones y variaciones de gravedad mediante modelos de deformación es necesario tener en cuenta tanto la masa de la intrusión como su interacción con el campo gravitatorio que se simula mediante el acoplamiento de las ecuaciones. Mediante un análisis similar se observa cómo el efecto del acoplamiento elástico-gravitatorio se ve enmascarado por el de la topografía del terreno. Por ello, se desarrolla un modelo elástico tridimensional que permite considerar el efecto de la topografía en el cálculo de deformaciones y variaciones de gravedad. Este modelo se resuelve numéricamente mediante el método indirecto de elementos en la frontera. El efecto de la topografía disminuye la magnitud de los desplazamientos y variaciones de gravedad y produce cambios de patrón con respecto a una solución obtenida sobre un semiespacio plano. Por tanto, posee fuertes implicaciones en la determinación de parámetros de fuente mediante la inversión de datos de observación. Así, para finalizar, invirtiendo los desplazamientos y variaciones de gravedad observados en el volcán Mayon (Filipinas) mediante un algoritmo genético, se muestra la variación que experimentan los parámetros de la fuente al tener en cuenta el efecto topográfico.Item GPS monitoring in the N-W part of the volcanic island of Tenerife, Canaries, Spain: Strategy and results(Pure and Applied Geophysics, 2004) Fernández, J.; Gónzalez Matesanz, F. J.; Prieto, J. F.; Rodríguez Velasco, Gema; Staller, A.; Alonso Medina, A.; Charco Romero, MaríaThis paper describes design, observation methodology, results and interpretation of the GPS surveys conducted in the areas of the N-W of Tenerife where deformation was detected using InSAR. To avoid undesirable antenna positioning errors in the stations built using nails, we designed and used calibrated, fixed-length metal poles, allowing us to guarantee that the GPS antenna was stationed with a height repeatability of the order of 1 mm and of less than 3 millimeters on the horizontal plane. The results demonstrate that this system is ideal for field observation, especially to detect small displacements that might be masked by accidental errors in height measurements or centering when observed with a tripod. When observations were processed, we found that using different antenna models in the same session sometimes causes errors that can lead to rather inaccurate results. We also found that it is advisable to observe one or two stations in all the sessions. The results have reconfirmed the displacement in the Chio deformation zone for the period 1995-2000 and indicate a vertical rebound from 2000 to 2002. They also confirm that the subsidence detected by InSAR to the south of the Garachico village has continued since 2000, although the magnitude of the vertical deformation has increased from around 1 cm to more than 3 cm a year. Detected displacements could be due to groundwater level variation throughout the island. A first attempt of modelling has been made using a simple model. The results indicate that the observed deformation and the groundwater level variation are related in some way. The obtained results are very important because they might affect the design of the geodetic monitoring of volcanic reactivation on the island, which will only be actually useful if it is capable of distinguishing between displacements that might be linked to volcanic activity and those produced by other causes. Even though the study was limited to a given area of Tenerife, in the Canary Islands, some conclusions apply to, and are of general interest in similar geodynamic studies.Item Space Geodesy, Potential Fields (gravity and geomagnetic) and Geomathematics(1ª Reunión Científica Instituto de Geociencias IGEO (CSIC-UCM), 2011) Fernández Torres, José; Osete, M. L.; Herraiz, M.; Arnoso Sampedro, J.; Montero, Javier; McIntosh, G.; Camacho, A.G.; Martin-Hernandez, F.; Charco Romero, María; Ruiz Martínez, Vicente Carlos; Pallero, J. L: G.; Pavón-Carrasco, F. J.; Pérez-Monserrat, Elena Mercedes; Charco Romero, MaríaThis new research sub-line, part of the Research Line/Department at Institute of Geosciences “Earth Dynamics and Earth Observation”, includes the activities of four previously existing research groups: (i) Space Geodesy,Gravimetry and Geomathematics, (ii) Palaeomagnetism, Rock Magnetism and Geomagnetic Modelling, (iii) Terrestrial and Planetary Magnetic Field and Aeronomy, and (iv)Gravimetry, Tides and Geodynamics. These four research groups, which are included on it to work together and cooperate during the next years, have been working until now independently and with very few cooperation between them. In short, it includes the study and modelling of the Earth’s (and others celestial bodies’) shape, gravity and magnetic fields, and their variations in time and space, using terrestrial and space integrated geodetic, gravimetric, geomagnetic and paleomagnetic data and advanced mathematical models and techniques.Item Introduction to Mathematics and Geosciences: Global and Local Perspectives, Volume II.(Pure and applied geophysics, 2016) Charco Romero, María; Orive, Rafael; Díaz Díaz, Jesús Ildefonso; Osete López, María Luisa; Fernandez, JoséItem 1ª Reunión Científica Instituto de Geociencias IGEO (CSIC-UCM) Madrid, 15 y 16 de septiembre de 2011(2011) Pérez-Monserrat, Elena Mercedes; Charco Romero, María; Fort González, RafaelEl objetivo de esta 1ª Reunión Científica del IGEO es presentar la investigación desarrollada y las Unidades Técnicas de las que dispone el IGEO, mostrado su potencial investigador y facilitando la colaboración con otros organismos. En la reunión se presentaron las diferentes sublíneas de investigación que comprende el IGEO, comunicaciones cortas de investigaciones concretas y la actividad realizada por sus Unidades Técnicas de Investigación, a disposición de toda la comunidad científica. El IGEO nace con un importante compromiso para potenciar las investigaciones en Geología, Geodesia y Geofísica. Hay una excelente oportunidad para desarrollar ideas y metodologías que permitan la interacción de las tres disciplinas e incremente el valor del trabajo llevado a cabo, que sea útil para toda la comunidad científica y, sobre todo, para la sociedad. [ABSTRACT] The aim of the 1st Scientific Meeting of IGEO is to introduce the research developed and the Technical Units available in the IGEO, shown their research potential and providing collaboration with other agencies. The meeting presented the different research sublines involving the IGEO, short communications dealt with specific investigations and the activity conducted by its Research Technical Units, available to the entire scientific community. The IGEO born with a commitment to enhance research in Geology, Geodesy and Geophysics. There is an excellent opportunity to develop ideas and methodologies in order to let the interaction of these three disciplines and to increase the value of the research carried out, to be useful for the scientific community and, above all, for society.Item Time-scales of inter-eruptive volcano uplift signals: Three Sisters volcanic center, Oregon (United States)(Frontiers in Earth Science, 2021) Rodríguez Molina, Sara; González, Pablo J.; Charco Romero, María; Negredo Moreno, Ana María; Schmidt, David A.A classical inflation-eruption-deflation cycle of a volcano is useful to conceptualize the timeevolving deformation of volcanic systems. Such a model predicts accelerated uplift during pre-eruptive periods, followed by subsidence during the co-eruptive stage. Some volcanoes show puzzling persistent uplift signals with minor or no other geophysical or geochemical variations, which are difficult to interpret. Such temporal behaviors are usually observed in large calderas (e.g., Yellowstone, Long Valley, Campi Flegrei, Rabaul), but less commonly for stratovolcanoes. Volcano deformation needs to be better understood during inter-eruptive stages, to assess its value as a tool for forecasting eruptions and to understand the processes governing the unrest behavior. Here, we analyze intereruptive uplift signals at Three Sisters, a complex stratovolcano in Oregon (United States), which in recent decades shows persistent inter-eruptive uplift signals without associated eruptive activity. Using a Bayesian inversion method, we re-assessed the source characteristics (magmatic system geometry and location) and its uncertainties. Furthermore, we evaluate the most recent evolution of the surface deformation signals combining both GPS and InSAR data through a new non-subjective linear regularization inversion procedure to estimate the 26 years-long time-series. Our results constrain the onset of the Three Sisters volcano inflation to be between October 1998 and August 1999. In the absence of new magmatic inputs, we estimate a continuous uplift signal, at diminishing but detectable rates, to last for few decades. The observed uplift decay observed at Three Sisters is consistent with a viscoelastic response of the crust, with viscosity of ∼10^(18) Pa s around a magmatic source with a pressure change which increases in finite time to a constant value. Finally, we compare Three Sisters volcano time series with historical uplift at different volcanic systems. Proper modeling of scaled inflation time series indicates a unique and well-defined exponential decay in temporal behavior. Such evidence supports that this common temporal evolution of uplift rates could be a potential indicator of a rather reduced set of physical processes behind inter-eruptive uplift signals.Item Banco de recursos virtuales para el aprendizaje experimental en geodesia y astronomía(III jornada Campus Virtual UCM : Innovación en el Campus Virtual metodologías y herramientas, 2007) Charco Romero, María; Folgueira López, Marta; García Cañada, Laura; Montesinos, F. G.; Rodríguez Caderot, Gracia; Rodríguez Velasco, Gema; García Alonso, Patricia; Fernández-Valmayor Crespo, Alfredo; Fernández-Pampillón Cesteros, Ana María; Merino Granizo, JorgeEl portal Nuestro Almacén Virtual Experimental de Astronomía y Geodesia (NAVEGA) que se presenta en esta comunicación es el resultado final de un proyecto de innovación y mejora de la calidad educativa convocatoria UCM 2004-2005. En él el alumno encuentra una serie de recursos didácticos de ayuda para el aprendizaje y comprensión de las prácticas experimentales impartidas en la Sección Departamental de Astronomía y Geodesia de la Facultad de Matemáticas. Cualquier alumno de estas asignaturas puede beneficiarse del uso del portal que no está sujeto a la programación de una asignatura en concreto. Los temas a los que se hace referencia en las distintas partes del portal están también relacionados con materias impartidas en los planes de estudio de diversas ingenierías como la Topográfica y la Geodésica, en titulaciones como Físicas, Geológicas, etc., en distintas Universidades, por supuesto no sólo de la Comunidad de Madrid. El portal ha sido usado de forma experimental durante parte del curso 2005-06 mediante acceso directo desde las asignaturas virtualizadas en la plataforma WebCT.