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Posts Tagged ‘Kamoamoa eruption’

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

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Tectonics Update – March 10

Posted by feww on March 10, 2011

Kilauea Volcanic Activity

Current Volcano Alert Level: WATCH
Previous Volcano Alert Level: WARNING
Current Aviation Color Code: ORANGE


Lava fountains from the northeastern vent of the Kamoamoa eruption. Pu`u `Ō `ō cone is seen in the background. Credit: HVO. Click image to enlarge.

Issued: March 9, 2011, 03:45UTC
Source: Hawaiian Volcano Observatory
Notice Number: 2011/H3

  • Eruption on Kīlauea volcano: East rift zone [end of the 2.3 km Kamoamoa fissure located between Pu’u ‘Ō’ō and Nāpau Crater.”Lava erupted from the western end of the fissure, which is near the eastern rim of Nāpau Crater, has formed a channelized ‘a’ā flow that extends 2.9 km (1.8 mi) to the southwest. The lava flow ranges from 80 to 290 m (260 to 950 ft) wide, but the active channel within the flow is only about 20 m (65 ft) wide.”
  • Lava spatter As high as 50 m
  • SO2 emission rate down to 4,400 tpd
  • Deflation slowing at both the summit and east rift zone.


A view of Halema`uma`u vent using thermal imaging. “The lava level dropped considerably over the past several days, retreating to a narrow opening deep within the vent cavity.” Source: HVO.  Click images to enlarge.


Extent of the Kamoamoa Fissure eruption, beginning March 5, 2011. The line of fissures extends 2.3 km, between Nāpau Crater and Pu`u `Ō `ō. The peach colored flow shown on the map is from the 1997 Nāpau Crater eruption. Source: HVO.

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JAPAN’s Sendai Quake Aftershocks

At least 25 aftershocks have been reported by Japan’s Meteorological Agency (JMA) since yesterday’s powerful 7.2Mw quake which struck off the coast of Miyagi Prefecture, about 168km east of the city of Sendai.

Two of the largest shocks measured M6.1 and 6.8, striking Sanriku Oki region at 03:45 JST [03:51 JST 10 Mar 2011] and 06:24 JST  [06:29 JST 10 Mar 2011] respectively.

FIRE-EARTH forecasts intense seismic activity in Japan Region during the 2011 – 2015 period.

Further deatails would be released on the need-to-know basis, partly to prevent Internet prophets from cashing in on FIRE-EARTH forecasts.


Sendai 7.2 earthquake. List of aftershocks. Source: JMA.
Click image to enlarge.

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Recent Significant Earthquakes

PNG

  • Magnitude 6.5 – NEW BRITAIN REGION, PAPUA NEW GUINEA –
    • Wednesday, March 09, 2011 at 21:24:51 UTC
    • Depth: 29km
    • Location:  6.022°S, 149.659°E

CHINA

  • Magnitude 5.4 – MYANMAR-CHINA BORDER REGION
    • The quake was a magnitude 5.8 shock striking Yingjiang County in southwest China’s Yunnan Province, Xinhua said.
    • At  least 24 people were killed and more than 250 others injured as a result.
    • The shock also destroyed about 1,000 buildings.

New Zealand

  • Magnitude 4.5 aftershock strikes 10 km east of Christchurch at a depth of 10km.
  • Magnitude 4.0 aftershock strikes about 5km from Lyttelton at a depth of 10km.

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Posted in earthquake 2011, Japan earthquake forecast, Japan Earthquakes 2011, Sendai quake, Yunnan earthquake | Tagged: , , , , | Leave a Comment »