Last night, the ONEMI (Oficina Nacional de Emergencias) and SERNGEOMIN (Chilean Geological Survey) in Chile raised the alert status for the area around Cerro Hudson in the southern Andes. Normally, raising the alert status like this is due to an acute change, when the behavior of the volcano shifts suddenly. However, this time, the elevation to Yellow alert status at Cerro Hudson is due to accumulated events over the past month.
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