Description: On July 5, 2024, AVO raised the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY for Cleveland volcano, citing sulfur dioxide gas emissions were detected on local gas monitoring sensors at Mount Cleveland starting June 21 with an increase in emission rate June 24-30. Although sulfur dioxide emissions declined to background levels on July 1, moderately elevated surface temperatures and vigorous steaming at the summit of the volcano observed over the past couple of days,
On July 8, 2024, the alert levels were returned to GREEN/NORMAL. While sulfur dioxide emissions continued to be observed, but at a level typical of background or usual activity.