Sangay volcano (Ecuador): flight observations and measurements

Wed, 12 Jan 2022, 05:10
05:10 AM | BY: MARTIN
The eruptive activity at three vents of Sangay volcano on 27 December 2021 (image: IGEPN)
The eruptive activity at three vents of Sangay volcano on 27 December 2021 (image: IGEPN)
Thermal images of lava flows at Sangay volcano on 27 December last year (image: IGEPN)
Thermal images of lava flows at Sangay volcano on 27 December last year (image: IGEPN)
The volcano observatory Instituto Geofísico (IG) in collaboration with the National Risk and Emergency Management Service (SNGRE) and the army aviation group Pichincha did surveillance research on gas, thermal and visual observations and measurements over Sangay volcano on 27 December 2021. The field research focused on the summit area, southeastern and northern flanks of the volcano.

Summit vents
Visual observations confirmed three summit vents. The central and western vent has been characterized by strombolian activity whereas the northern vent has been dominated with "only" degassing. The central vent's surface temperature was measured at 645 °C, the western's at 410 °C and the northern's at 515 °C.

Lava flows
Two lava flows on the southeastern and northern flank remain active, currently about 540 and 370 meters long with temperatures of 580 °C and 450 °C.

SO2 emissions
MultiGAS-based measurements detected SO2 concentrations in gas plumes at an altitude between 5,200 m and 5,600 m.

Source: Instituto Geofísico volcano activity update 11 January 2022

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