Seismic tremor at Pavlov remains at very high levels: AVO
The eruption of Pavlov Volcano continues. It began around 4 pm AKDT on Sunday (00:00UTC). Maximum ash cloud altitude of 37,000 ft (~ 11,300m) above sea level indicated.
AVO/USGS Volcanic Activity Notice
- Volcano: Pavlof (VNUM #312030)
- Location: N 55 deg 25 min W 161 deg 53 min
- Elevation: 8,261 ft (2,518 m)
- Area: Alaska Peninsula Alaska
- Current Volcano Alert Level: WARNING
- Current Aviation Color Code: RED
- Issued: Monday, March 28, 2016, 8:34 AM AKDT (2016-03-28/16:34UTC)
Source: Alaska Volcano Observatory – Notice Number: 2016/A3
Volcanic Activity Summary:
- The eruption of Pavlov Volcano continues.
- It began around 4 pm AKDT on Sunday (00:00UTC).
- Seismic tremor remains at very high levels.
- Lighting associated with the ash eruption has been detected.
- Infrasound (pressure sensor) data from a sensor network located in Dillingham (400 miles or 650 km) also indicate sustained ash emissions.
Pavlof volcano in eruption, March 27, 2016. Photo courtesy of Colt Snapp, taken at 7:00 PM AKDT from a flight enroute to Anchorage, from Dutch Harbor. URL: http://www.avo.alaska.edu/images/image.php?id=93201
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. Please see the NWS web page for additional guidance and forecasts of ash movement. http://aawu.arh.noaa.gov/sigmets.php
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.
Recent Observations: [Volcanic cloud height] 37,000 ft ASL in SIGMET
[Other volcanic cloud information] Extending for 400 miles to the NE as of 07:00 UTC.
Hazard Analysis: [Mud flow] Mud flows on the flanks of the volcano are likely.
Satellite image showing strong ash signal (blue) extending more than 500 km (300 mi), north-northeast from Pavlof volcano, 4:19 am AKDT (12:19 UTC), March 28, 2016. Photographer/Creator: Michelle Coombs URL: http://www.avo.alaska.edu/images/image.php?id=93191
Remarks: Pavlof Volcano is a snow- and ice-covered stratovolcano located on the southwestern end of the Alaska Peninsula about 953 km (592 mi) southwest of Anchorage. The volcano is about 7 km (4.4 mi) in diameter and has active vents on the north and east sides close to the summit. With over 40 historic eruptions, it is one of the most consistently active volcanoes in the Aleutian arc. Eruptive activity is generally characterized by sporadic Strombolian lava fountaining continuing for a several-month period. Ash plumes as high as 49,000 ft ASL have been generated by past eruptions of Pavlof, and during the 2013 eruption, ash plumes as high as 27,000 feet above sea level extending as much as 500 km (310 mi) beyond the volcano were generated. The nearest community, Cold Bay, is located 60 km (37 miles) to the southwest of Pavlof.
Mt. Cleveland: Color Code YELLOW Alert Level ADVISORY
Index map showing location of Pavlof volcano and other Alaska Peninsula volcanoes. Credit: Janet Schaefer/AVO
Location of Cleveland volcano and other Aleutian volcanoes with respect to nearby cities and towns. Credit: Janet Schaefer/AVO
Latest Seismic Activity along Aleutian Trench:
5.5 76km S of Nikolski, Alaska 2016-03-28 17:14:55 UTC 10.0 km
4.6 63km SSE of Nikolski, Alaska 2016-03-28 11:45:06 UTC 38.3 km
2.8 95km SSE of Nikolski, Alaska 2016-03-28 05:34:38 UTC 24.3 km
3.3 85km SSE of Nikolski, Alaska 2016-03-27 20:40:42 UTC 25.5 km
4.1 71km S of Nikolski, Alaska 2016-03-27 19:44:35 UTC 29.7 km
4.7 70km S of Nikolski, Alaska 2016-03-27 18:27:27 UTC 35.0 km
3.4 96km SSE of Nikolski, Alaska 2016-03-27 18:21:43 UTC 25.7 km
4.5 80km S of Nikolski, Alaska 2016-03-27 18:14:00 UTC 26.8 km
5.7 84km S of Nikolski, Alaska 2016-03-27 18:01:30 UTC 16.0 km
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