Abstract
Many seismic, geochemical, hydrological, and microgravity signatures support Tenerife's recent volcanic unrest [Péerez et al., 2004; Marrero et al., 2005; Almendros et al., 2007; Gottsmann et al., 2006; López et al., 2006; Tarraga et al., 2006; Pérez et al., 2007]. Volcanic unrest at Tenerife may or may not affect Teide's shallow magmatic system and therefore prompt its reawakening. García et al. [2006] claimed a reawakening of Teide, and a coauthor (R. Ortiz) predicted an explosive eruption with a 70% probability [Olaizola, 2005]. They reported a picture of a “plume” at the volcano's summit on October 2004 as evidence of Teide's reawakening.On the contrary, continuous monitoring of carbon dioxide emissions at Teide as well as a visual and close inspection of the summit cone did not support any outburst of gases at that time. Other data that do not support the reactivation of the shallow magma chamber beneath Teide are the low rate of sulfur dioxide emissions [Weber et al., 2006], small observed fluctuation of the helium isotope ratio, and other geochemical signatures from the fumaroles. Also, the first results of a permanent GPS network do not report deformation (T. Sagiya et al., Establishment of the Canary Islands GPS network for volcano monitoring and its initial results, submitted to Journal of Volcanology and Geothermal Research, 2007).
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