Description: From Dixon and others (2020): "Avalanches are common on Iliamna Volcano, and although no large debris avalanches were noted in 2017, small debris flows were observed. In March, a pilot noticed a debris flow feature on the west side of Iliamna Volcano (fig. 5). A second flow feature was fortuitously imaged by an AVO web camera in mid-April. A review of web-camera images shows the debris flow began on April 12 during the warmest part of the day, with more material moving downslope over a period of 6 hours (fig. 6). During an April 20 gas overflight, AVO observed minor snow and debris avalanche deposits on all flanks of the volcano. Despite complications from a south wind, successful gas measurements were obtained from the fumarole fields on the southeast side of the volcano indicating typical background-level emissions. The Aviation Color Code and Volcano Alert Level at Iliamna Volcano remained at GREEN and NORMAL, respectively, throughout the year."