On January 22, 2018, Alert Level 4 was raised after Mayon spewed a 3 kilometer tall ash column at around 12:45 PM. Classes in all levels in private and public schools were suspended in the whole province of Albay. By evening, lava fountains were spewed from the crater with pyroclastic flows and ash plumes. Lava bombs and rockfalls could also be observed and rumbling sounds from the eruptions could be heard. The eruption type was classified as a Strombolian eruption.