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Archive for the ‘Alaska volcanoes’ Category

Cleveland and Kīlauea Remain at ORANGE Alert

Posted by feww on April 6, 2012

Explosion destroys dome in Cleveland summit crater

Sudden explosions of blocks and ash may occur, while the volcano remains active, with the ash clouds rising to above 20,000 feet above sea level, AVO said.

  • Elevation:  5,676 ft (1,730 m)
  • Location: 52.8222° N, 169.945° W
  • Quadrangle: Samalga


Mt Cleveland. Photo taken at 18:00 UTC on 11 Mar 2012 while transiting north through Samalga pass. Several small explosions were detected in days prior to the time of the photo, but very little ash is observed on the upper flanks.  Credit:  Matthew Davis/NOAA.

KILAUEA VOLCANO

19°25’16” N 155°17’13” W,
Summit Elevation 4091 ft (1,247 m)
Current Volcano Ale,rt Level: WATCH
Current Aviation Color Code: ORANGE

Activity Summary for past 24 hours:  The summit continued to inflate slowly while back-to-back DI events and sympathetic summit lava lake oscillations continued. Overnight, glow was visible within the Halema`uma`u gas plume and from sources within Pu`u `O`o crater. To the southeast, surface flows continued to be active on the pali and the coastal plain; there was no ocean entry. Seismic tremor levels were low; gas emissions were elevated: HVO


Kīlauea Volcano.  Active flows continued over a broad area on the coastal plain on April 5, 2012.  “This composite image combines a normal photograph and a thermal image to show the areas of active breakouts. Yellow areas are active flows while red areas are inactive, but still warm, flows. The flow front in the lower right was 1.6 km (1 mile) from the ocean,” HVO said.

Alert Level Increased for Iliamna Volcano, AK

Iliamna Activity – Color Code YELLOW Alert Level ADVISORY

Since January 2012 the earthquake rate at Iliamna Volcano has steadily increased and now exceeds normal background levels.


Iliamna Volcano. View from the SSE of Iliamna showing the prominent NE shoulder fumarole field near the summit. Note glacier disturbance (movement) on the east flank (upper Red Glacier).  Photo: Game McGimsey/AVO/USGS.

Pagan

Location: Mariana Islands  (18.13 ºN,  145.8 ºE)
Elevation: 570 m
Recent Eruption: 2006
Volcanic Alert Level: ADVISORY
Aviation Color Code: YELLOW

A gas and steam plume continued to extend downwind from the summit vent throughout the past week, but there were no further reports of unrest or activity at Pagan volcano, USGS said.

Other Volcanic Activity/ Unrest (Source: GVP)

New Activity/Unrest:

Ongoing Activity:

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Posted in active volcanoes, Alaska volcanoes, hawaii volcanoes, major volcanoes, super volcanoes, US Volcanoes, volcanoes | Tagged: , , , , , , , , , , , , , , , , | Leave a Comment »

Redoubt could explode at any time

Posted by feww on May 6, 2009

Redoubt Activity – Color Code ORANGE : Alert Level WATCH

Latest update from AVO:

An explosive event could occur at any time with little warning

Local time: May 06, 2009 0525 AKDT (May 06, 2009 1325 UTC)

2009-05-06 04:23:52
Seismic activity remains unchanged over the last 2 hours. Repeating seismic events continue. It is possible that an explosive event could occur at any time with little warning. Weather clouds have dissipated near the volcano. The volcano is once again visible from the Hut netcam, and has occasionally revealed glowing spots related to rockfalls from the growing dome.


Image of Redoubt’s dome and summit area, taken during gas / observation flight on May 4, 2009. Image Creator: Keith Labay ; Image courtesy of AVO/USGS.


View of the north flank of Redoubt Volcano from the research hut where one of the webcams is situated. This zoomed image shows a minor block-and-ash flow advancing down the talus slope below the dome produced from hot debris shed off the dome. Hot debris collects in the gorge above the waterfall generating minor, secondary steam/ash clouds. Picture Date: April 30, 2009 14:14:39 AKDT –  Image Creator: Game McGimsey -Image courtesy of AVO/USGS.


View of the growing lava dome during gas and observation flight on May 4, 2009. Note the tongue of blocky lava extending down the upper Drift gorge. A lighter gray slope of talus – rocky debris shed off the slowly advancing tongue of lava – fills the gorge downslope, nearly reaching the muddy waterfall. Small plumes of ash rise from rockfalls. Note the vigorously steaming margins of the dome, possibly caused by interaction of hot rock and water accumulating from melting snow and ice in the summit crater. Colleague Rick Wessels used a shortwave infrared (SWIR) image captured by a nighttime pass of Landsat 7 to show the dimensions of the dome – about 510 x 760 m (1700 feet x 2500 feet) and at least 150 m (500 feet) high. See image below. Picture Date: May 04, 2009 AKDT – Image Creator: Christina Neal – Image courtesy of AVO/USGS.


Shortwave infrared (SWIR) image of the warm dome areas captured by a nighttime pass of Landsat 7 on May 02, 2009. The hot dome pixels have been placed over a WorldView image from April 16, 2009 and a topographic map from 1990. The SWIR image shows a hot central vent as well as areas of active rockfalls along the perimeter.

Picture Date: May 02, 2009 07:12:54 UTC  –  Image Creator: Rick Wessels – Image montage produced by AVO/USGS. Landsat data courtesy of USGS Earth Resources Observation and Science (EROS). WorldView Data, Digital Globe, Inc (copyright 2009)


Redoubt Volcano active lava dome taken from the north The top image is an oblique airphoto by Game McGimsey while the bottom shows the FLIR thermal image. Picture Date: April 16, 2009 12:48:50 AKDT – Image Creator: Rick Wessels – Image courtesy of AVO/USGS.

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Posted in Alaska volcanoes, explosive event, lava flow, oil terminal, redoubt ashfall | Tagged: , , , , | Leave a Comment »

Redoubt Update: March 31, 2009

Posted by feww on March 31, 2009

Redoubt Activity – Color Code RED : Alert Level WARNING

Date Time :  March 31, 2009 1330 UTC/ March 31, 2009 0530 AKDT

On 2009-03-31 at 05:28:55 AKDT AVO reported:

Seismicity at the volcano has been low, but remains above background level. Weak tremor and small discrete earthquakes have been observed in the past hour.

Latest Images from AVO


Photograph of impact from the volcanic ash fall out in Nikiski, AK from Redoubt volcano. This plume was generated during the March 28, 15:29 AKDT, 2009 event, and ash fall began at approximately 16:16 AKDT and lasted maybe 5 minutes. Fine ash is resuspended as vehicles drive over the recently deposited ash fall deposit. Picture Date: March 30, 2009 16:45:00 AKDT. Image Creator:  Kristi
Wallace. Image courtesy of AVO/USGS. [Image added March31, 2009]


Photograph of Redoubt Volcano in eruption taken during observation and gas data collection flight on March 30, 2009. View is to the east. Continuous emission of volcanic gas, water vapor, and ash is producing a plume rising to about 15,000 feet above sea level. The haze at left below the drifting cloud is a region of active ash fall. AVO scientists observed ash falling up to 25 miles downwind. Picture Date: March 30, 2009 AKDT. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.
[Image added March31, 2009]


Photograph taken during observation and gas data collection flight on March 30, 2009. Looking east / southeast down into the upper crater rim of Redoubt Volcano.
Picture Date: March 30, 2009 AKDT. Image Creator:  Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT.  Looking at the north flank of Redoubt Volcano.
Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT.
Looking east at Redoubt Volcano. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT.  Looking at the north flank of Redoubt Volcano.
Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


BSE image showing groundmass, with glass, plagioclase, pyroxene, and oxide microlites. The scale bar is absent here, but the image was collected at 400 X, compared with 100 X from image 17485 [SEE BELOW.]  Picture Date: March 30, 2009. Image Creator: Jessica Larsen.  Image courtesy of the AVO/UAF-GI.


BSE image showing amphibole grain with reaction rim in sample AT-1605. Image Creator: Jessica Larsen.  Image courtesy of the AVO/UAF-GI.


Redoubt 15:29 eruption, 3/28/2009. Picture Date: March 28, 2009 AKDT. Image Creator: Tricia Joy Sadler. Image courtesy of the photographer.


Photograph of lightning from Redoubt’s 1:20 am March 28 eruption, courtesy of Bretwood Higman. Picture Date: March 28, 2009. Image Creator: Bretwood Higman. Image courtesy of Bretwood Higman.

For background information and selection of previous images see:

Posted in Alaska volcanoes, Anchorage, ashfall, redoubt eruption, volcanism | Tagged: , , , | 1 Comment »

Redoubt Volcano Erupts Explosively

Posted by feww on March 28, 2009

Published at: March 28, 2009 06:05 UTC (March 27, 2009 22:05 AKDT)

Redoubt Volcano Latest Observations (Source: AVO)

2009-03-27 21:55:58 AKDT
At 19:25 AKDT March 27, 2009 (3:25 UTC March 28) an explosive eruption occurred at Redoubt volcano.
National Weather Service reports an ash cloud height of about 51,000 feet above sea level. This follows closely behind the eruption that occurred at approximately 17:35 AKDT (01:35 UTC) that sent ash to an estimated height of 40,000 feet above sea level.
See the National Weather Service Redoubt Coordination Page for any ash fall advisories: http://pafc.arh.noaa.gov/volcano.php

For background information and selection of previous images see:

For Latest Images see below:


Photograph of impact from the volcanic ash fall out in Nikiski, AK from Redoubt volcano. This plume was generated during the March 28, 15:29 AKDT, 2009 event, and ash fall began at approximately 16:16 AKDT and lasted maybe 5 minutes. Fine ash is resuspended as vehicles drive over the recently deposited ash fall deposit. Picture Date: March 30, 2009 16:45:00 AKDT. Image Creator:  Kristi
Wallace. Image courtesy of AVO/USGS.


Photograph of Redoubt’s March 27, 19:25 eruption cloud, as seen from near Homer. Photograph courtesy of Dennis Anderson. Picture Date: March 27, 2009 19:57:00. Image Creator: Dennis Anderson. Image courtesy of Dennis Anderson (via AVO)  http://www.auroradude.com


Photograph taken during oberservation / gas collection flight to Redoubt Volcano on March 26, 2009. Image Creator:
Tina Neal. Image courtesy of AVO/USGS.


Ash cloud seen in the geostationary MTSAT data, courtesy of the National Weather Service, processed by the Cooperative Institute for Meteorological Satellite Studies at the University of Wisconsin-Madison . We are at the extreme edge of the view for the satellite which is over the equator in Asia. Picture Date: March 26, 2009 17:30:00 UTC. Image Creator: Jonathan Dehn. Image courtesy of the National Weather Service.


Redoubt volcano viewed from the south over the ash-covered Crescent River Valley. Picture Date: March 26, 2009 17:18:45 AKDT. Image Creator: Game McGimsey. Image courtesy of AVO/USGS.


View northeast over the piedmont lobe of the Drift Glacier and down the Drift River valley showing the effects of flooding caused by eruptions of Redoubt volcano earlier in the day. Picture Date: March 26, 2009 17:29:02 AKDT. Image Creator: Game McGimsey. Image courtesy of AVO/USGS.


Photograph taken during observation / gas collection flight to Redoubt Volcano on March 26, 2009.
Picture Date: March 26, 2009. Image Creator: Tina Neal. Image courtesy of AVO/USGS.


Photograph taken during observation / gas collection flight to Redoubt Volcano on March 26, 2009. Picture Date: March 26, 2009. Image Creator: Tina Neal. Image courtesy of AVO/USGS.


View west across Drift River of small eruption cloud over Redoubt volcano. Picture Date: March 26, 2009 16:08:16 AKDT. Image Creator: Game McGimsey. Image courtesy of AVO/USGS.


Photograph of Redoubt’s ash cloud, taken on the morning of Thursday, March 26, 2009, by Robert Cole, Peninsula Airways pilot. Image courtesy of Robert Cole and PenAir.


View of the ash-covered lower Crescent River Valley. Picture Date: March 26, 2009 17:17:25 AKDT. Image Creator: Game McGimsey. Image courtesy of AVO/USGS.

OMI sulfur dioxide satellite image from the March 23 2009 eruptive events at Redoubt volcano. Colors represent relative amount of gas with dark orange/red being the highest and blue/purple the lowest. This is from combining 2 OMI orbits for March 23 2009. AURA/OMI: 03/23/2009 20:43 – 22:34 UTC, SO2 mass: 42.152 kt; Area: 285,359 km2, SO2 max: 58.87 DU at Lon: -149.05, Lat: 61.58. These data are from NASA’s EOS-Aura satellite and its Ozone Monitoring Instrument (OMI), courtesy of Dr. Simon Carn, Michigan Technology University. Picture Date: March 25, 2009.


Photograph of ash fall at Homestead Lodge, about 35 miles south of Redoubt, on the western side of Cook Inlet. View is of the backyard, with ash. Picture Date: March 26, 2009. Image Creator:
James Isaak. Image courtesy of the photographer.


SEM image of ash particles erupted by Redoubt volcano on March 22, 2009. The ash sample was collected during the ashfall in Healy, Alaska by Pavel Izbekov on March 23, 2009. The image was acquired by Pavel Izbekov and Jill Shipman using ISI-50 Scanning Electron Microscope at the Advanced Instrumentation Laboratory, University of Alaska Fairbanks. Picture Date: March 24, 2009. Image Creator: Pavel Izbekov.  Jill Shipman. Image courtesy of the AVO/UAF-GI.

Related Links and volcano entries for March 2009:

Posted in Alaska volcanoes, ashfall, Aura Omi, EOS-Aura satellite, SO2 | Tagged: , , , , | 1 Comment »