Deposits from the 1 February 2014 eruption of Tungurahua volcano (Ecuador)

Abstract:

Tungurahua volcano (Ecuador) begun its current cycle of activity in 1999 and has presented periods of variable activity since then. During phases of strong explosive activity, pyroclastic density currents (PDCs) are generated, mostly since 2012. The February 1, 2014 eruption has been one of the biggest of these small volume PDC events. PDCs branched into at least 9 valleys on the flanks of the volcano and reached the zone of the main road at the base of the edifice in several locations. The ash fallout associated to the eruption also affected crops and disturbed human activity. Early observation (February) of the mantling zones of singed vegetation indicated the impact of hot co-PDC clouds. Zones 50 m above the valley thalwegs were affected where topography and creek courses triggered the formation of turbulent clouds, whereas little or no damage directly next to the deposits were observed in straight, low-slope flow paths. Temperature measurements within the deposit

Año de publicación:

2014

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Fuente:

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