Current Volcano Alert Level: WARNING
Current Aviation Color Code: RED
Issued: Monday, March 28, 2016, 8:34 AM AKDT (20160328/1634Z)
Source: Alaska Volcano Observatory
Location: N 55 deg 25 min W 161 deg 53 min
Elevation: 8261 ft (2518 m)
Area: Alaska Peninsula Alaska
Volcanic Activity Summary: The eruption of Pavlof Volcano, that began around 4 pm AKDT yesterday (00:00 UTC) continues. Seismic tremor remains at very high levels. Lighting associated with the ash eruption has been detected this morning, and infrasound (pressure sensor) data from a sensor network located in Dillingham (400 miles or 650 km) also indicate sustained ash emissions.
As of 7:00 AKDT (15:00 UTC) a continuous plume of ash is observed in satellite images extending for a distance of more than 400 miles (650 km) to the northeast over interior Alaska. SIGMET warning messages issued by the National Weather Service (NWS) Alaska Aviation Weather Unit indicate maximum ash cloud altitude of 37,000 ft above sea level.
Lava fountaining from the summit crater was observed throughout the night by mariners, pilots, and by residents in Cold Bay, located 37 miles (60 km) to the SW, . Volcanic mudflows are likely on the flanks of the volcano and could present a hazard in the local river valleys.
Volcanic cloud height :37,000 ft ASL in SIGMET , extending for 400 miles to the NE as of 07:00 UTC
Report Published Monday, March 28, 2016, 6:01
Volcanic Activity Summary: The intensity of eruptive activity at Pavlof Volcano has declined significantly starting at about 12:30 pm AKDT and currently continuous ash emission from the summit vent is not being observed in satellite imagery. Thus, AVO is lowering the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH. Seismicity and infrasound signals from Pavlof have dropped to low levels and it appears that the robust eruptive activity that began yesterday afternoon has declined for now. The level of seismic tremor is still slightly above background. A drifting ash cloud extending from the southern Bering Sea into interior Alaska is still present and may pose a hazard to air travel.
Although the intensity of the eruption has diminished, it is possible for conditions to change at any time and significant ash emissions may resume with little to no warning. At this reduced level of unrest, it is possible that low-level lava fountaining and minor amounts of ash emission may be occurring and affecting the area in the immediate vicinity of the volcano. AVO will continue to monitor the volcano closely.
March 29, 2016. Pavlof , Alasaka :
Source : AVO/USGS
Photo : Almandmoss, Nahshon