An eruption of Santiaguito produced a column of volcanic debris that soared more than 27,000 feet into the Central American skies.
Disaster officials said falling ash damaged local crops but caused no human injuries.
The eruption was followed by renewed activity within Fuego volcano, located near Guatemala’s colonial capital of Antigua.
A third active volcano, Pacaya, was releasing gas.
Guatemala has about 288 volcanoes, but only eight have been been active during recorded history.