The Bogoslof Island is located along the southern edge of the Bering Sea and it is part of the Aleutian Island chain.
After 55 minutes, the volcano settled and the alert color code was reduced to orange.
'We actually went to color code red this afternoon because of numerous lightning detections and increased seismic signals, ' Jeffrey Freymueller, from the Geophysical Institute at the University of Alaska, Fairbanks, told CNN.
Ash from volcanoes can harm and even completely halt jet engines when it rises above 20,000ft.
According to a report released by the Observatory, Bogoslof Volcano is still in an unpredictable state.
There were some reports of a light ash dusting of Alaska's Unalaska Island and the community of Dutch Harbor, some 63 miles southeast of the volcano, during an eruption in February.
'The main hazards associated with the current eruption are from volcanic clouds. In 2010 the eruption of the Eyjafjallajokull volcano in Iceland caused the cancellation of flights around Europe for six days. The latest eruption sequence started in December 2016. Previous eruption events have lasted weeks to months, according to the AVO.
It's important to issue an aviation alert in the event of a volcanic eruption because the ash cloud produced could spell trouble to passing aircraft. Low-level activity of the volcano could be a threat to the immediate vicinity as additional explosions may occur with little warning or precursory activity.