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Are the ashes from the latest eruptions (2010–2016) at Turrialba volcano (Costa Rica) related to phreatic or phreatomagmatic events?
(Elsevier, 2016-09-15)The initial eruptive episodes of explosive eruptions are classified as phreatic if the amount of juvenile material (scoria, glass, pumice) is null, and the amount of fresh accidental lithics, and hydrothermally altered ... -
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 ... -
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 ... -
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 -
Fotografías de visitas al Volcán Arenal (40 fotografías)
(Universidad Nacional, Costa Rica, 2016)Fotografías del Volcán Arenal, en gira de campo -
Fotografías de visitas al Volcán Irazú (50 fotografías)
(Universidad Nacional, Costa Rica, 2016)Fotografías del volcán Irazú, en gira de campo -
Fotografías de visitas al Volcán Poás (50 fotografías)
(Universidad Nacional, Costa Rica, 2016)Fotografías del volcán Póas, en gira de campo -
Fotografías de visitas al Volcán Rincón de la Vieja (20 fotografías)
(Universidad Nacional, Costa Rica, 2016)Fotografías del Volcán Rincón de la Vieja, en gira de campo -
Fotografías de visitas al Volcán Turrialba (50 fotografías)
(Universidad Nacional, Costa Rica, 2016)Fotografías del volcán Turrialba, en gira de campo -
Imágenes de la medición de grietas y otros cambios geomorfológicos
(Universidad Nacional, Costa Rica, 2016)Imágenes de la medición de grietas y otros cambios geomorfológicos (de interés vulcanológico) en volcanes con la finalidad de compararlos con otras metodologías de vigilancia volcánica -
Imágenes de notas periodísticas sobre los volcánes periodo 2015-2016
(2016)Notas periodísticas sobre los volcánes Poás, Turrialba, Rincón de la Vieja, Arenal e Irazú, durante los años 2015-2016 -
International geosciences field research with undergraduate students: Three models for experiential learning projects investigating active tectonics of the Nicoya Peninsula, Costa Rica
(Geological Society of America, 2009)International field experiences offer exceptional opportunities for effective student learning in the geosciences. Over the 10 yr period between 1998 and 2008, more than 40 undergraduate students from 14 institutions ... -
Mercury fluxes from volcanic and geothermal sources: an update
(Geological Society, London, Special Publications, 2014-08-02)We review the state of knowledge on global volcanogenic Hg emissions to the atmosphere and present new data from seven active volcanoes (Poa´s, Rinco´n de la Vieja, Turrialba, Aso, Mutnovsky, Gorely and Etna) and two ... -
Mercury fluxes from volcanic and geothermal sources: An update
(The Geological Society of London vol. 410 263 – 285. 2015, 2015-03-01)We review the state of knowledge on global volcanogenic Hg emissions to the atmosphere and present new data from seven active volcanoes (Poás, Rincón de la Vieja, Turrialba, Aso, Mutnovsky, Gorely and Etna) and two geothermal ... -
Nicoya earthquake rupture anticipated by geodetic measurement of the locked plate interface
(Nature Research, 2013-12-22)The Nicoya Peninsula in Costa Rica is one of the few places on Earth where the seismically active plate interface of a subduction zone is directly overlaid by land rather than ocean. At this plate interface, large megathrust ... -
Parâmetros de fonte de sismos locais por inversão de formas de ondas
(Sociedade Brasileira de Geofísica, 2010-11)The main purpose of this work is to invert seismic waveforms in order to obtain moment tensor for two medium size earthquakes detected by OVSICORI-UNA Costa Rica permanent seismic network, occurred in 2004, following the ... -
Posters (carteles) producidos en base a giras a volcanes (periodo 2015-2015
(Universidad Nacional, Costa Rica, 2016)Posters (carteles) producidos en base a giras a volcanes (periodo 2015-2015) -
The intraplate Porto dos Gaúchos seismic zone in the Amazon craton — Brazil
(Elsevier, 2009-01-15)The largest earthquake observed in the stable continental interior of the South American plate occurred in Serra do Tombador, Mato Grosso state — Brazil, on January 31, 1955 with a magnitude of 6.2 mb. Since then no other ... -
Tomographic evidence for a subducted seamount beneath the Gulf of Nicoya, Costa Rica: The cause of the 1990 Mw = 7.0 Gulf of Nicoya earthquake
(American Geophysical Union, 2002-04-26)Tomographic images constrain the existence of a subducted seamount beneath the Gulf of Nicoya, Costa Rica. The subducted seamount is found at a depth of 30 km within the rupture area of the March 25, 1990, Mw = 7.0 Gulf ... -
Transport properties of glassy and molten lavas as a function of temperature and composition
(Elsevier, 2016-11-15)We provide measurements of thermal diffusivity (D), heat capacity (CP), and viscosity (η) for 12 remelted natural lavas and 4 synthetic glasses and melts, ranging in composition from leucogranite to low-silica basalt, and ...