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Nevado del Ruiz
A light spewing of ash amid renewed rumblings in the Nevado del Ruiz volcano prompted Colombian authorities to evacuate 500 people from beneath its flanks and briefly suspend flights at four airports. The volcano's seismic activity was more intense than episodes in April and early May, when it emitted columns of steam, said the government geological agency Ingeominas. The 17,160ft volcano spouted ash that fell on population centers including the western city of Manizales.