Sangay Developments

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The volcano showed a dramatic activity today.

A strong, dilute pyroclastic flow (gravity-driven mass flow) appeared to descend over the southeastern flank in early this morning. The reason for this torrent is not clear yet, but from previous observations at the volcano, it might come from continuous glowing rock falls on the southern slope and its sudden accumulation and destabilization culminating into pyroclastic density currents as happened today. Pyroclastic flows are deadly, turbulent hot avalanche of lava rock fragments of all sizes embedded in a mixture of turbulent gas and ash racing down slopes.
Near-frequent vulcanian eruptions continue to produce ash columns releasing pyroclastic material to approx. 5,8 km-6,1 km (19,000 ft-20,000ft) in the western-northwestern direction.
Satellite-based measurements of SO2 concentrations were detected in plumes of about 759 tonnes on 1 March.
According to MIROVA Detection System, a high thermal anomaly (497 MW) was detected in satellite images over the past 24 hours.
Lahars (mud flows) could also occur if heavy rainfalls remobilise the fresh ash deposits.
Source: Instituto Geofísico volcano activity update 29 May 2023

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