Browsing Observatorio Vulcanológico y Sismológico de Costa Rica by Title
Now showing items 40-59 of 185
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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, ... -
Drones Swoop in to Measure Gas Belched from Volcanoes
(EOS. Science News by AGU, 2018-07-25)Los gases volcánicos son importantes herramientas de pronóstico de erupciones que se utilizan a menudo en el monitoreo de volcanes. Sin embargo, la recolección de muestras de gas requiere que los científicos ingresen a ... -
Duration-amplitude distribution of volcanic tremor
(American Geophysical Union, 2003)The duration-amplitude distribution of volcanic tremor was examined in eight volcanoes and one geothermal area. An exponential model, implying a scale-bound source process, is found to be a better fit to the data than a ... -
Earthquake and tsunami forecasts: Relation of slow slip events to subsequent earthquake rupture
(National Academy of Sciences, 2014-11-17)The 5 September 2012 Mw 7.6 earthquake on the Costa Rica subduction plate boundary followed a 62-y interseismic period. Highprecision GPS recorded numerous slow slip events (SSEs) in the decade leading up to the earthquake, ... -
Emplazamiento de ceniza al sur del volcán Turrialba (Basado en trabajo de campo del 4 de mayo de 2016)
(Universidad Nacional, Costa Rica, 2016)Se realizó una documentación de los depósitos de ceniza al sur y sureste del cráter activo del volcán Turrialba con trabajo de campo del 4 de mayo de los corrientes. Tales cambios están relacionados con la actividad eruptiva ... -
Eruptive activity at Turrialba volcano (Costa Rica): Inferences from 3He/4He in fumarole gases and chemistry of the products ejected during 2014 and 2015
(AGU Publications, 2016)A new period of eruptive activity started at Turrialba volcano, Costa Rica, in 2010 after almost 150 years of quiescence. This activity has been characterized by sporadic explosions whose frequency clearly increased since ... -
Estimating tsunami potential of earthquakes in the Sumatra-Andaman region based on broadband seismograms in India
(Universidad Nacional, Costa Rica., 2012)In this paper, we report that the ratio of broadband energy (0.01–2 Hz) to highfrequency energy (0.3–2 Hz), Er, estimated from regional seismograms of India, might be a useful parameter in estimating tsunami potential of ... -
Extremely high diversity of sulfate minerals in caves of the Irazú Volcano (Costa Rica) related to crater lake and fumarolic activity
(International Journal of Speleology, 2018-05)The caves of the Irazú volcano (Costa Rica), became accessible after the partial collapse of the NW sector of the Irazú volcano in 1994, offering the opportunity to investigate active minerogenetic processes in volcanic ...