volcano erupted in Iceland on Saturday night, forcing international flights to divert their courses away from the island nation, weekend media reports say.

The Grimsvotn volcano, Iceland’s most-active one, is located about 90 miles (145 kilometers) southeast of the capital, Reykjavik, the reports say. The volcano last erupted in 2004.

Iceland aviation officials ordered planes to fly outside a zone of 120 nautical miles (220 kilometers) in all directions around the volcano, which sits in a glacier, the reports say.

In April 2010, an eruption from another Icelandic volcano grounded 100,000 flights in the first six days, Bloomberg News reported.