Mudflows and some flooding could be expected in the Cathedral River valley north of the volcano. Airborne ash hazards to aircraft may be considerable if a large explosive event occurs but much less severe during a typical Strombolian phase. AVO has a seismic network of six stations near the volcano. Several periods of increased seismicity during the past 24 hours indicate that the eruption is episodic in character with ejection of incandescent material to elevations of probably less than 10,000 feet above sea level. Intermittent low level ash clouds were detected on satellite imagery during the past 24 hours.
Weather is poor and inhibits visual observations.
Spatter-fed lava flows emanate from the summit vent on occasion. Mudflows and some flooding could be expected in the Cathedral River valley north of the volcano. Airborne ash hazards to aircraft may be considerable if a large explosive event occurs but much less severe during a typical Strombolian phase. AVO has a seismic network of six stations near the volcano and will continue to monitor the volcano's eruptive activity. During the past week, periods of increased seismicity are interpreted to correlate with eruption of ash and bombs several hundred to perhaps 1,000 feet above the summit of the cone.