when was the last time the erta ale volcano erupted
Erta Ale There was a major eruption on 25 September 2005 which killed 250 head of livestock and forced thousands of nearby residents to flee.[5] There was further lava flow in August 2007, forcing the evacuation of hundreds and leaving two missing.[6] An eruption on 4 November 2008 was reported by scientists at Addis Ababa University.[7] Another eruption was reported in January 2017.[8]
Nevado del Ruiz During recorded history, eruptions have consisted primarily of a central vent eruption (in the caldera) followed by an explosive eruption, then lahars. Ruiz's earliest identified Holocene eruption was about 6660 BC, and further eruptions occurred in 1245 BC ± 150 years (dated through radiocarbon dating), about 850 BC, 200 BC ± 100 years, 350 AD ± 300 years, 675 AD ± 50 years, in 1350, 1541 (perhaps),[nb 1] 1570, 1595, 1623, 1805, 1826, 1828 (perhaps),[b] 1829, 1831, 1833 (perhaps),[b] 1845, 1916, December 1984 – March 1985, September 1985 – July 1991, and possibly in April 1994.[b] Many of these eruptions involved a central vent eruption, a flank vent eruption, and a phreatic (steam) explosion.[23] Ruiz is the second-most active volcano in Colombia after Galeras.[16]