Cleveland Volcano has burped again.

According to the Alaska Volcano Observatory, the eruption occurred around 4:30am, and it sent a small ash cloud as high as six kilometers into the air. There is no real-time seismic monitoring network on Cleveland, but the activity was recorded by nearby stations on Okmok and Makushin volcanoes.

Cleveland is located on uninhabited Chuginadak Island, but it lies under a major international flight path. Today’s eruption did not interfere with air travel, but the aviation color code remains at orange. The remote volcano has shown regular activity over the past two years and continues to be on watch.