Browsing Observatorio Vulcanológico y Sismológico de Costa Rica by Title
Now showing items 33-52 of 185
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Coda wave attenuation in the Parecis Basin, Amazon Craton, Brazil: sensitivity to basement depth
(Springer, 2011)Small local earthquakes from two aftershock sequences in Porto dos Gaúchos, Amazon craton—Brazil, were used to estimate the coda wave attenuation in the frequency band of 1 to 24 Hz. The time-domain coda-decay method of ... -
Combined GPS, EDM and triangulation surveys of the rapid downslope motion of the western flank of Arenal Volcano, Costa Rica
(2011)Here we present initial conclusions of a one year-long combined geodesy campaign on Arenal Volcano, in Costa Rica (2008-2009). Our data shows evidence for an active local tectonic surrounding, and a 7cm/yr displacement ... -
Comparación de la composición química de partículas PM10 y PM2,5 colectadas en ambientes urbanos y zonas volcánicas del área metropolitana de Costa Rica
(Revista Ciencias Ambientales, 2014-12)Se muestrearon, en forma simultánea, partículas PM10 y PM2,5 en ambientes urbanos y volcánicos del área metropolitana de Costa Rica, durante octubre y noviembre de 2012. En las áreas industriales y comerciales de alto flujo ... -
Constraints on inner forearc deformation from balanced cross sections, Fila Costen˜ a thrust belt, Costa Rica
(American Geophysical Union, 2007-12-21)The Fila Costeña thrust belt in the forearc of Costa Rica is accommodating a significant portion of the convergence of the Cocos plate and Panama microplate. Geologic mapping of the thrust belt depicts a duplex with three ... -
Constraints on the sulfur subduction cycle in Central America from sulfur isotope compositions of volcanic gases
(European Association of Geochemistry, 2022-01-20)The sulfur cycle at convergent margins remains poorly constrained yet is fundamentally important for understanding the redox state of Earth's reservoirs and the formation of ore deposits. In this study we investigate the ... -
Constraints on upper mantle anisotropy surrounding the Cocos slab from SK(K)S splitting
(American Geophysical Union, 2010-06-24)SKS and SKKS splitting observations are used to constrain the pattern of mantle flow in the Central American subduction zone beneath Costa Rica and Nicaragua. After removing the effects of shallow wedge anisotropy on ... -
Correlation between the age of the subducting Cocos plate and the geometry of the Wadati- Benioff zone under Nicaragua and Costa Rica
(1981-06)This work integrates six tectonic feautures related to the subduction of the Cocos plate under the Caribbean plate along the souhern terninus of the Middle America Trench (Nicaragua and Costa Rica) into a self-consistent ... -
Correlation between the age of the subducting Cocos Plate and the geometry of the Wadati-Benioff zone under Nicaragua and Costa Rica.
(Universidad Nacional, Costa Rica, 1995)High- resolution seismicity data from Costa Rica and southern Nicaragua have been used to image the geometry of the Wadati-Benioff zone under southern Central America. The data include 9,514 events with computed horizontal ... -
Costa Rica y el sistema del Tratado Antártico
(Universidad Nacional, Costa Rica, 2018)En este trabajo se presentan los antecedentes históricos, geográficos, científicos y políticos que llevaron a la firma del Tratado Antártico (TA), en diciembre de 1959 y de las posteriores convenciones internacionales y ... -
Croquis y mapas utilizados en informes de campo de giras a volcanes
(Universidad Nacional, Costa Rica, 2016)Croquis y mapas utilizados en informes de campo de giras a volcanes -
Crustal structure along the southern Central American volcanic front
(American Geophysical Union, 2008-08-20)Subduction alters continents several ways, including accretion, magmatic addition, mantle wedge serpentinization, and crustal differentiation. These changes affect seismic velocities, so characterizing upper plate crust ... -
Crustal Thickness Along the Central American Volcanic Arc
(American Geophysical Union, 2004)Resumen de ponencia "Crustal Thickness Along the Central American Volcanic Arc" -
Crustal Thickness of the Central American Arc
(2007-06-18) -
Crustal Velocity Anomalies in Costa Rica from Ambient Noise Tomography
(Springer Nature, 2019-08-24)We derive group velocity maps for crustal Rayleigh waves across Costa Rica and corresponding 3-D shear-wave velocity structure from ambient noise cross-correlations between 56 seismic broadband stations. The daily inter-station ... -
El deslizamiento de las Torres del Irazú del 2020 (Costa Rica): antecedentes, colapso y situación actual
(Universidad Nacional, 2020)El presente trabajo presenta un recuento de las investigaciones que se realizaron desde el 2011 en el sector inestable conocido como las Torres del Irazú, sobre uno de los deslizamientos mejor estudiados a nivel mundial ... -
Deslizamientos al oeste de la cima en el volcán Irazú (Basado en trabajo de campo del 8 de febrero de 2016)
(Universidad Nacional, Costa Rica, 2016)Con el fin de ampliar la documentación de procesos, al oeste de la cima en el volcán Irazú, se realizó trabajo de campo el lunes 8 de febrero de 2016. Este informe se refiere a cambios registrados a poco más de un año, ...