The Unidad Estatal de Protección Civil de Colima reported that on 6 October scientists conducted an overflight of Colima and noted that the summit crater was 200 m wide and 50 m deep. Explosions had excavated parts of the crater, exposing the inner wall stratigraphy in the W and N parts of the crater.
Fumarolic plumes rose from vents outside of the crater and from the SE interior. Weaker fumarolic activity was present in the NE and W sectors. An explosion on 5 October had produced a small pyroclastic flow that had traveled 2.1 km down the flanks. The report reminded the public to stay at least 5 km away from the crater, and 12 km away in the Montegrande drainage. Based on satellite images, wind data, webcam views, and notices from the Mexico City MWO, the Washington VAAC reported that during 13-16 and 18-19 October ash plumes from Colima rose to altitudes of 5.5-6.7 km (15,000-22,000 ft) a.s.l. and drifted SW and NW.
October 22, 2015. Colima, Mexique:
19,514 ° N, 103.62 ° W
Elevation 3850 m
Sources: Unidad Estatal de Protección Civil de Colima, Washington Volcanic Ash Advisory Center (VAAC)
Photo : Hernando Rivera