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Posts Tagged ‘Volcano Eruption Alert’

Volcano Eruption Alert: Canlaon Volcano Remains at Alert Level 1

Posted by feww on March 30, 2016


[Issued by Philippine Institute of Volcanology and Seismology – PHIVOLCS]

Two (2) minor eruption events occurred at Kanlaon Volcano’s active crater at around 6:20 PM and 7:18 PM of 29 March 2016 that lasted around 12 minutes and 25 seconds, respectively, based on visual observation and seismic recording. These events were recorded by the Kanlaon Seismic Network as explosion-type earthquakes. The first event was accompanied by a booming sound heard in Sitio Guintubdan, Brgy. Ara-al and Brgy. Yubo, La Carlota City, Negros Occidental and Brgy. Pula Canlaon City, Negros Oriental. From the southeastern side of the volcano, the eruption plume was observed to have reached 1500 meters above the active crater. Incandescent ejecta apparently caused small bushfire at the upper slope as observed from La Castellana. Traces of light ashfall were reported in Sitio Guintubdan, Brgy. Ara-al, La Carlota City, Negros Occidental. The eruption was followed by two episodes of volcanic tremor from 10:38 PM 29 March to 00:26 AM 30 March and from 01:30 AM this morning to present (ongoing). Continuous GPS data as of 14 March 2016 indicated slight inflation of the Kanlaon edifice since December 2015.

Alert Level 1 status remains in effect over Kanlaon Volcano, which means that it is currently in a state of unrest probably driven by hydrothermal processes that could generate more minor eruptions. The local government units and the public are reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the further possibilities of sudden and hazardous steam-driven or minor ash eruptions. Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as airborne ash from a sudden eruption can be hazardous to aircraft. DOST-PHIVOLCS is closely monitoring Kanlaon Volcano’s activity and any new development will be relayed to all concerned.

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Volcano Eruption Alert: Pavlov Volcano Eruption Continues

Posted by feww on March 28, 2016

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:

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.

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:

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

Pavlof location map
Index map showing location of Pavlof volcano and other Alaska Peninsula volcanoes.  Credit: Janet Schaefer/AVO

Cleveland location map
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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