On June 10, almost a year after its last eruption, Mount Bulusan erupted again at 11:35am. The eruption lasted for five minutes and generated an ash plume measuring 6,562 feet or some 2,000 meters. According to PHIVOLCS, the eruption was phreatic in nature and had a shallow source, with the ash drifting northwest to the direction of Juban town. While the PHIVOLCS did not raise the alert level 1 in the volcano, it advised residents not to enter the four-kilometer Permanent Danger Zone and warned pilots not to fly near the volcano.