Cotopaxi

Cotopaxi's most violent eruptions in historical times occurred in the years 1742, 1744, 1768, and 1877. The 1744 and 1768 events destroyed the colonial town of Latacunga. During the June 26, 1877 eruption, pyroclastic flows descended on all sides of the mountain melting the entire ice cap, with lahars traveling more than 100 km (62 mi) into the Pacific Ocean and western Amazon basin draining the valley.^[2] The city of Latacunga was again leveled completely due to the mudslide deposits.

• http://en.wikipedia.org/wiki/Cotopaxi