AVO Bogoslof ORANGE/WATCH - No activity observed in monitoring data.
Sep 13, 2017 21:01 - Unrest at Bogoslof volcano continues. No activity was observed in cloudy satellite images over the past day. No activity was detected in seismic or infrasound data from neighboring islands. Bogoslof volcano remains at a heightened state of unrest and in an unpredictable condition. Activity can escalate quickly with 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 ...