USGS Volcano Hazards Program Volcano Update
Sudden explosions of blocks and ash remain possible with little or no warning, although the last confirmed explosion occurred on August 20. Ash clouds, if produced, could exceed 20,000 feet above sea level. If a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff quickly. However, for some events, a delay of several hours is possible. There is no real-time seismic monitoring network on Mount Cleveland and AVO is unable to track activity in real time.
Update in Common Alerting Protocol (CAP) format