WKN Weer, Klimaat en Natuurrampen
Lees alles over het onstuimige weer op onze planeet, volg orkanen en tornado's, zie hoe vulkanen uitbarsten en hoe Moeder Aarde beeft bij een aardbeving. Alles over de verwoestende kracht van onze planeet en tal van andere natuurverschijnselen.
En check deze andere BIG SCALE pics of the redoubt
http://www.boston.com/big(...)s_mount_redoubt.html
quote:Mount Redoubt experienced another explosive eruption on April 4, 2009, according to the Alaska Volcano Observatory. The eruption sent a cloud of volcanic ash and vapor to a height of roughly 15,240 meters (50,000 feet). The cloud drifted toward the volcano’s southeast.
The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite took this picture on April 4, 2009. Mount Redoubt sits on the western side of Alaska’s Cook Inlet, and the volcanic plume blows toward the southeast, across the water. On the eastern side of Cook Inlet, the plume appears to change direction, moving toward the northeast before resuming its general southeastern course. This zigzag trajectory might be explained by different wind directions at different altitudes.
On both the western and eastern sides of Cook Inlet, some of the snowy surface has been colored muddy brown, likely resulting from a coating of volcanic ash.
SULFUR DIOXIDE LOOP: (Updated April 8th)
A loop of sulfur dioxide gas more than 600 miles in diameter is swirling off the coast of California. It came from Alaska where Mt. Redoubt unleashed its biggest eruption yet on April 4th. Click on the image to launch a 5-day animation of the volcano's SO2 emissions spanning April 3rd through 7th:
Data source: The GOME-2 sensor onboard Europe's MetOp-A satellite
The April 4th eruption produced a long plume of stratospheric SO2 which has since split. Half is drifting across the northern reaches of Canada and the Great Lakes. The other half is having a close encounter with the Pacific coast of North America. If you live in these areas, be alert for rare colors and rays in the evening sky. Sulfur dioxide and associated aerosols can produce fantastic sunsets.
BRON: http://www.spaceweather.com/
A loop of sulfur dioxide gas more than 600 miles in diameter is swirling off the coast of California. It came from Alaska where Mt. Redoubt unleashed its biggest eruption yet on April 4th. Click on the image to launch a 5-day animation of the volcano's SO2 emissions spanning April 3rd through 7th:
Data source: The GOME-2 sensor onboard Europe's MetOp-A satellite
The April 4th eruption produced a long plume of stratospheric SO2 which has since split. Half is drifting across the northern reaches of Canada and the Great Lakes. The other half is having a close encounter with the Pacific coast of North America. If you live in these areas, be alert for rare colors and rays in the evening sky. Sulfur dioxide and associated aerosols can produce fantastic sunsets.
BRON: http://www.spaceweather.com/
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New Array Captures Redoubt Volcano Lightning
April 8th, 2009
Redoubt lightning. Credit: Bretwood Higman
When Redoubt Volcano in Alaska started rumbling in January, a team of researchers from New Mexico Tech hurried to south central Alaska to deploy a series of radio sensors. When the volcano began erupting overnight on March 22 and 23, the Lightning Mapping Array started returning clear and dramatic information about the electricity created within volcanic plumes and the resulting lightning. This is the first time ever anyone has been able to record data from a volcanic eruption right from the start. “We’re getting all the data we hoped to get and a lot more,” principal investigator Dr. Ron Thomas said. “Absolutely, the quality and quantity of the data will allow us to better understand the electrical charge structure inside a volcanic plume.”
Click to continue…
BRON: universetoday.com
April 8th, 2009
Redoubt lightning. Credit: Bretwood Higman
When Redoubt Volcano in Alaska started rumbling in January, a team of researchers from New Mexico Tech hurried to south central Alaska to deploy a series of radio sensors. When the volcano began erupting overnight on March 22 and 23, the Lightning Mapping Array started returning clear and dramatic information about the electricity created within volcanic plumes and the resulting lightning. This is the first time ever anyone has been able to record data from a volcanic eruption right from the start. “We’re getting all the data we hoped to get and a lot more,” principal investigator Dr. Ron Thomas said. “Absolutely, the quality and quantity of the data will allow us to better understand the electrical charge structure inside a volcanic plume.”
Click to continue…
BRON: universetoday.com
<a href="http://www.vwkweb.nl/" rel="nofollow" target="_blank">[b]Vereniging voor weerkunde en klimatologie[/b]</a>
<a href="http://www.estofex.org/" rel="nofollow" target="_blank">[b]ESTOFEX[/b]</a>
<a href="http://www.estofex.org/" rel="nofollow" target="_blank">[b]ESTOFEX[/b]</a>
quote:In early May 2009, the Alaska Volcano Observatory (AVO) warned that Mount Redoubt could erupt explosively at any time with little or no warning. The AVO cited the volcano’s seismic activity, gaseous output, and lava-dome growth as reasons for concern. The AVO warned that a collapse of the lava dome could send significant amounts of ash and meltwater down nearby Drift Glacier.
The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite acquired this image of Mount Redoubt and its surroundings on May 5, 2009, when the volcano exhibited little visible activity besides a plume of vapor. In this false-color image made from a combination of visible and infrared light, the bright white steam plume hovers over the volcano’s summit. Immediately southwest of this plume, clouds appear fairly thin and dull. North of the volcano, pristine snow rests on the land surface, but southeast of the volcano, ashfall from earlier eruptions has stained the icy surface. (In the large image, the vegetation in the coastal areas and in river valeys is red.)
Redoubt is a stratolvolcano—a steep-sloped, conical volcano composed of layers of hardened lava, solidified ash, and rocks ejected by previous eruptions. Starting on March 22, 2009, after weeks of unrest, the volcano suddenly erupted five times in one night. Redoubt remained intermittently active afterward.
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