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Posts Tagged ‘Lava fountain’

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: 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

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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Kilauea Volcano Continues to Discharge Lava

Posted by feww on July 15, 2008

Kilauea Status Reports, Updates, and Information Releases

HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Monday, July 14, 2008 07:48 HST (Monday, July 14, 2008 17:48 UTC)

KILAUEA VOLCANO (CAVW#1302-01-)
19.42°N 155.29°W, Summit Elevation 4091 ft (1247 m)
Volcano Alert Level: WATCH
Aviation Color Code: ORANGE


The lava fountain on shield 3 (12-15 m high). USGS

Activity Summary for last 24 hours: Kilauea summit and Pu`u `O`o cone continued to deflate. Unusually small amounts of ash and elevated amounts of sulfur dioxide gas continued to issue from the Halema`uma`u vent. At the east rift eruption site, incandescence was observed from vents within Pu`u `O`o Crater; lava flows from the TEB vent flows through tubes to ocean at Waikupanaha; surface flows within the abandoned Royal Gardens subdivision may have reached the coastal plain.

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Photograph by C. Heliker on September 19, 1984

Lava fountain 450 m high bursts from Pu`u `O`o in September 1984. In the foreground, low fountains play above a fissure that opened just before the main vent began to erupt. After the high fountains relieved some of the pressure on the magmatic system, the fissure activity died.

Summary of the Pu`u `O`o-Kupaianaha Eruption, 1983-present

The Pu`u `O`o-Kupaianaha eruption of Kilauea, now in its twenty-fourth year and 55th eruptive episode, ranks as the most voluminous outpouring of lava on the volcano’s east rift zone in the past five centuries. By January 2007, 3.1 cubic km of lava had covered 117 km2 and added 201 hectares to Kilauea’s southern shore. In the process, lava flows destroyed 189 structures and resurfaced 14 km of highway with as much as 35 m of lava.

Beginning in 1983, a series of short-lived lava fountains built the massive cinder-and-spatter cone of Pu`u` O`o. In 1986, the eruption migrated 3 km down the east rift zone to build a broad shield, Kupaianaha, which fed lava to the coast for the next 5.5 years.

When the eruption shifted back to Pu`u `O`o in 1992, flank-vent eruptions formed a shield banked against the west side of the cone. From 1992 to 2007, nearly continuous effusion from these vents has sent lava flows to the ocean, mainly inside the national park. Flank vent activity undermined the west and south sides of the cone, resulting in the collapse of the west flank in January 1997.

Since 1997, the eruption has continued from a series of flank vents on the west and south sides of the Pu`u `O`o cone. During this time the composite flow field has expanded westward, and tube-fed pahoehoe forms a plain that spans 15.6 km at the coast.


Puʻu ʻŌʻō ( pronounced roughly “poo-oo oh-oh”) is a cinder/spatter cone in the eastern rift zone of the Kīlauea volcano of the Hawaiian Islands. USGS.


Aerial view of lava lake in Pu‘u ‘O‘o crater. The crater is about 250 m in diameter. 30 August 1990. Credit: J.D. Griggs – USGS/HVO


1983-1986, The rise of Pu`u `O`o: episodic lava fountains build massive cone. USGS


Lava moves across the ground as a pahoehoe flow, Kilauea Volcano, Hawai`i – Photograph by J.D. Griggs on 13 November 1985 – USGS

Eruption_1954_Kilauea_Volcano
Hawaii Volcanoes National Park. May 1954 eruption of Kilauea Volcano. Halemaumau fountains. Photo by J.P. Eaton, May 31, 1954. USGS

This report on the status of Kilauea volcanic activity, in addition to maps, photos, and webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at http://www.nps.gov/havo/ or 985-6000. Hawai`i County Viewing Area status can be found at http://www.lavainfo.us or 961-8093.

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