AVO Bogoslof ORANGE/WATCH - No activity observed over past day in monitoring data.
Jul 15, 2017 20:37 - No activity was detected in seismic, infrasound, or lightning data over the past day. Nothing significant observed in mostly cloudy satellite images. Bogoslof volcano remains at a heightened state of unrest and in an unpredictable condition. Activity can escalate quickly with additional explosions producing high-altitude (>15,000 ft) volcanic clouds with little to no detectable precursory activity. Some previous explosions have been preceded by an increase in earthquake activity that allowed for short-term forecasts of imminent significant explosive activity. Although ...