On 24 March, INGEOMINAS lowered the Alert Level for Galeras to III (Yellow; “changes in the behavior of volcanic activity”). During the previous week daily sulfur dioxide levels were high. Earthquake levels were low in both intensity and occurrence. During 21-23 March, white-colored gas plumes rose to an altitude of 5.4 km (17,700 ft) a.s.l. and drifted in multiple directions.
Sources: Instituto Colombiano de Geología y Minería (INGEOMINAS), El Tiempo – “Report provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”