Reventador volcano (Ecuador) - Smithsonian / USGS Weekly Volcanic Activity Report for 1 December-7 December 2004 (Continuing Activity)

According to the Washington VAAC, satellite imagery on 2 December showed an ash plume from Reventador at a height of ~5 km extending W of the volcano. Also, IG reported to the VAAC that ash was seen drifting NW on 4 December. A hot spot was visible on infrared satellite imagery.
On 4 December, Strombolian activity was seen in Reventador's crater. Since 9 November, volcanic material continued to gradually fill the crater and generate a lava flow down one flank. Activity was accompanied by a gas column that reached a maximum height of 3 km.

Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)
---
From: Global Volcanism Program, 2004. Report on Reventador. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 1 December-7 December 2004. Smithsonian Institution and US Geological Survey.