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Posts Tagged ‘weekly Volcano Watch’

VolcanoWatch 26 June 2011

Posted by feww on June 26, 2011

VoW: The Restive Kīlauea

Kīlauea: Probably the World’s Most Active Volcano

Kīlauea is the youngest volcano on the Big Island of Hawai`i.


The active lava lake in Pu`u `Ō `ō and its levee. View looking east into Pu`u `Ō `ō, its crater partly filled by lava flows accumulating on the crater floor. The active lava lake in the crater is 205 m (673 ft) long and varies in width from 80–115 m (262–377 ft). The West Gap pit is in the central foreground, and the Puka Nui and MLK pits are to the right (the MLK pit is in back). The crater has filled in vertically about 100 m (328 ft) since the crater collapsed on March 5, 2011, at the start of the uprift Kamoamoa eruption. It still has about 12 m (39 ft) to go to reach the level of the crater floor prior to the collapse. Source of image and caption: HVO. Click images to enlarge.


Lighter-colored patches of lava on the crater floor are recent overflows. Source: HVO.


Along with overflows, low-level spattering from points wandering around the perimeter of the lava lake continually builds up the levee that impounds the lake. Source: HVO.


The lava lake’s levee stands up to 8 m (26 ft) above the surrounding crater floor. This steep-sided levee impounds the lava and forms what is called a “perched” lava lake. Pieces of the rim occasionally collapse into the lake, leading to sudden and fast-moving overflows of lava onto the crater floor. Source: HVO.


Map of Kīlauea. Source: HVO

  • Location: 19.425ºN 155.292ºW
  • Elev.: 1,277 m a.s.l.
  • Area: 1,430 km2 (13.7% of Hawai`i)
  • Volume: 25,000-35,000 km3

Click HERE for more images and information …

Weekly Volcanic Activity Report

(based on SI /USGS report for 15 June – 21 June 2011)

New activity/unrest:

FEWW Map of Volcanoes


Map of Volcanoes. Background Map: University of Michigan. Designed and enhanced by Fire Earth Blog. Click image to enlarge.

Ongoing Activity

Current Alerts for U.S. Volcanoes

  • Kilauea Watch Orange 2011-06-25 07:53:30
  • Pagan Advisory Yellow 2011-06-24 10:23:48
  • Long Valley Volcanic Center Normal Green 2011-06-24 17:58:30
  • Mauna Loa Normal Green 2011-06-04 07:16:42
  • Hualalai Normal Green 2011-06-04 07:16:42
  • Haleakala Normal Green 2011-06-04 07:16:42
  • Mauna Kea Normal Green 2011-06-04 07:16:42
  • Yellowstone Normal Green 2011-06-01 14:15:51
  • Lo`ihi Unassigned 2011-06-04 07:16:42

US Volcanoes: Webcams

Related Links

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VolcanoWatch Weekly [25 June 2009]

Posted by feww on June 25, 2009

Volcanic Activity Report:  17 June – 23 June 2009

Source: Global Volcanism program (GVP) – SI/USGS Weekly Volcanic Activity Report

New activity/unrest:

Notes:

The eruption from Sarychev Peak that began on 11 June continued through the 19th. Another explosive eruption on 15 June was followed by a plume that extended 360 km NW. Ash clouds from earlier explosions reached 13.7 km (45,000 feet) altitude. Ash emissions continued during 17-18 June.

During 21 June ash plumes from Rinjani rose to an altitude of 3 km (10,000 ft) and drifted 55 km N. (Source: GVP)

Volcano of the Week: Rabaul Caldera

Rabaul caldera, named after the town of Rabaul (town is built inside the caldera), is a large volcano in East New Britain, Papua New Guinea. Its Tavurvur  and Vulcan cones erupted in 1994, devastating Rabaul and killing about a dozen people. It’s 1937 eruption killed more than 500 people.

Country: Papua New Guinea
Geographical region: New Britain
Volcano Type: Pyroclastic shield
Last Known Eruption: 2009 (continuing)
Summit Elevation: 688 m  (2,257 feet)
Latitude: 4.271°S  (4°16’15″S)
Longitude: 152.203°E  (152°12’10″E)
Source: Global Volcanism Program (GVP)


Tavurvur volcano – part of Rabaul Caldera –– Papua New Guinea. Image Credit and Licensing details.

rabaul_amo_2009093
Rabaul Volcano on the northeastern end of New Britain captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite on April 3, 2009 releasing plumes of volcanic ash and steam. NASA image courtesy MODIS Rapid (!) Response Team, Goddard Space Flight Center.


The low-lying Rabaul caldera on the tip of the Gazelle Peninsula at the NE end of New Britain forms a broad sheltered harbor utilized by what was the island’s largest city prior to a major eruption in 1994. The outer flanks of the 688-m-high asymmetrical pyroclastic shield volcano are formed by thick pyroclastic-flow deposits. The 8 x 14 km caldera is widely breached on the east, where its floor is flooded by Blanche Bay and was formed about 1400 years ago. An earlier caldera-forming eruption about 7100 years ago is now considered to have originated from Tavui caldera, offshore to the north. Three small stratovolcanoes lie outside the northern and NE caldera rims of Rabaul. Post-caldera eruptions built basaltic-to-dacitic pyroclastic cones on the caldera floor near the NE and western caldera walls. Several of these, including Vulcan cone, which was formed during a large eruption in 1878, have produced major explosive activity during historical time. A powerful explosive eruption in 1994 occurred simultaneously from Vulcan and Tavurvur volcanoes and forced the temporary abandonment of Rabaul city. Photo by Wally Johnson, 1969 (Australia Bureau of Mineral Resources). Caption: GVP).

FEWW expects ongoing activity, punctuated by explosive eruptions by the volcano, for the rest of 2009 and possibly most of 2010.

Ongoing Activity:

Latest U.S. Volcano Alerts and Updates for Wednesday, Jun 24, 2009 at 18:14:32 PDT

  • Redoubt Activity – Color Code ORANGE : Alert Level WATCH

  • Kilauea Activity  –  Color Code ORANGE : Alert Level WATCH

  • Veniaminof Activity – Color Code GREEN : Alert Level NORMAL

  • Mauna Loa Activity – Color Code YELLOW : Alert Level ADVISORY

Redoubt Volcano Latest Observations: Local time: June 24, 2009 1705 AKDT (June 25, 2009 0105 UTC)
The eruption of Redoubt continues. Seismic activity remains low but above background levels.

Related Links:

Posted in Papua New Guinea, Tavurvur, volcanism, volcanoes, Vulcan | Tagged: , , , , | Leave a Comment »

Weekly Volcano Watch: 30 April 2009

Posted by feww on April 30, 2009

Volcanic Activity Report: 22 April – 28 April 2009

Source: Global Volcanism program (GVP) – SI/USGS Weekly Volcanic Activity Report

New activity/unrest:

VoW: Bazman


Bazman Volcano Satellite Image – ASTER Volcano Archive – dated 2007/07/12- Image ID: SC:AST_L1A.003:2044912154

Country:  Iran
Region: SE Iran
Volcano Type: Stratovolcano
Last Known Eruption: Unknown
Summit Elevation: 3,490 m  (11,450 feet)
Latitude: 28.07°N    (28°4’0″N)
Longitude: 60.00°E    (60°0’0″E)


Bazman (Kuh-e Bazman) is a 3490-m-high stratovolcano in a remote and arid region in SE Iran. A well-preserved, 500-m-wide crater caps the summit of the volcano. Its satellitic lava domes have been the source of fresh-looking viscous lava flows, including the prominent one with dramatic flow levees at the lower left. No historical eruptions are known from Bazman, but minor fumarolic activity has been reported. Image:
NASA Space Shuttle image ISS006-E-5209, 2002 (http://eol.jsc.nasa.gov/). Caption: GVP.

Map of Volcanoes of the ME and the Indian Ocean

bazman-volcano
Source: GVP.

FEWW Forecast: FEWW believes there is 0.7 probability Bazman volcano could erupt in 2009.

Ongoing Activity:

The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.

Latest U.S. Volcano Alerts and Updates for Thursday, Apr 30, 2009 at 03:58:49 PDT

Related Links:

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