On 6 June at 2305 an explosion from Colima produced an ash plume to a height of ~8.5 km (27,900 ft) a.s.l. The ash plume traveled SW at a speed of ~70 km/hour, and ash fell in and around the cities of Colima (~30 km away) and Villa de Alvarez. On 11 June Universidad de Colima reported that a small lava dome was visible in Colima's crater. According to news articles, nearly 50 people who were evacuated from near the volcano during the previous week returned to their homes on 13 June.

Geological Summary. The Colima complex is the most prominent volcanic center of the western Mexican Volcanic Belt. It consists of two southward-younging volcanoes, Nevado de Colima (the high point of the complex) on the north and the historically active Volcán de Colima at the south. A group of late-Pleistocene cinder cones is located on the floor of the Colima graben west and east of the complex. Volcán de Colima (also known as Volcán Fuego) is a youthful stratovolcano constructed within a 5-km-wide scarp, breached to the south, that has been the source of large debris avalanches. Major slope failures have occurred repeatedly from both the Nevado and Colima cones, producing thick debris-avalanche deposits on three sides of the complex. Frequent recorded eruptions date back to the 16th century. Occasional major explosive eruptions have destroyed the summit (most recently in 1913) and left a deep, steep-sided crater that was slowly refilled and then overtopped by lava dome growth.

Sources: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima, Associated Press, Associated Press, Washington Volcanic Ash Advisory Center (VAAC)