Popocatepetl volcano (Mexico) - Smithsonian / USGS Weekly Volcanic Activity Report for 28 June-4 July 2017 (Continuing Activity)
An explosion at 1145 on 4 July generated an ash plume that rose 2.5 km above the crater rim and drifted W. The Alert Level remained at Yellow, Phase Two.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
From: Global Volcanism Program, 2017. Report on Popocatepetl. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 28 June-4 July 2017. Smithsonian Institution and US Geological Survey.