Vulkanausbruch in Alaska- Mount Augustine

[Anja_Magglingen]

"Vulkanausbruch in Alaska

Mount Augustine - Dampf steigt auf vom Mount Augustine, nachdem der Vulkan eine riesige Aschewolke rund neun Kilometer hoch in den Himmel geschleudert hatte. Für die Vulkanforscher ein willkommenes Spektakel. Menschen soll er nicht gefährlich werden, denn der Feuerberg befindet sich auf einer unbewohnten Insel fast 300 Kilometer südwestlich von Alaskas größter Stadt Anchorage entfernt. Doch bei seiner letzten Eruption im März 1986 fiel Ascheregen auf die Stadt und unterbrach den Flugverkehr.

Mitte Dezember 2005 stieg dann erneut eine pilzförmige Wolke aus Dampf und ätzendem Schwefeldioxid aus dem Krater, Hunderte kleiner Beben kündigten einen größeren Ausbruch an. Am Mittwoch morgen (Ortszeit) war es schließlich soweit. wom"

Artikel erschienen am Fr, 13. Januar 2006
www.welt.de

Hier einige Bilder:
http://www.sturmforum.ch/forum_uploads/ ... 191354.ugu
http://www.sturmforum.ch/forum_uploads/ ... 191538.jpg
http://www.sturmforum.ch/forum_uploads/ ... 191805.jpg

Description: event in progress. Please see
http://www.avo.alaska.edu/activity/Augustine.php
for most current information and chronology.

LG Anja

[Anja_Magglingen]

Interpretation and Hazards:

Based on our current understanding of Augustine's past eruptions and our analysis of the current episode of unrest, AVO considers the following future scenarios as possible:

1) Failed Eruption: No eruption occurs as magma does not reach the surface. Earthquake activity, ground deformation, gas output, and steaming slowly decrease over several weeks or months.
2) Eruption similar to those of 1976 and 1986: Unrest continues to escalate culminating in an eruption that is similar to those that occurred in 1976 and 1986. An eruption such as this would likely spread volcanic ash throughout and perhaps beyond Cook Inlet depending upon the prevailing winds. Much of Augustine Island would be inundated by pyroclastic flows, mud flows, ash fall, and ballistic showers.
3) Larger Explosive Eruption: A significantly larger eruption could occur, perhaps similar to eruptions that are thought to have taken place prehistorically. Such an eruption might involve the production of larger ash plumes, significant modification of the island's summit, and large pyroclastic flows and mud flows on the island.
4) Flank Collapse: The intruding magma or other processes could destabilize a portion of the Augustine cone that could result in a large landslide. If this landslide entered Cook Inlet, a localized tsunami could be generated. Such a landslide and tsunami were associated with the 1883 eruption of Augustine Volcano. It is also likely that a landslide of this type would be accompanied by an eruption.

Based on all available monitoring data AVO, regards scenario number two, an eruption similar to those in 1976 and 1986, as the most probable outcome at this time. At this time scenarios one, three and four are considered less likely.

AVO will continue to monitor the volcano closely. We plan to add additional instrumentation on the volcano to help us better understand the nature of this unrest. New data and observations may lead us to change our assessment. Any changes would be announced in a subsequent Information Release.

Further information on Augustine Volcano and related hazards and response plans can be found at the following web sites:

Alaska Volcano Observatory: Most recent information on Augustine Volcano

U.S. Geological Survey: Hazards associated with volcanic ash fall

NOAA National Weather Service: Ash cloud trajectories and aviation warnings

NOAA West Coast and Alaska Tsunami Warning Center: Tsunami issues related to Augustine

Alaska Division of Homeland Security and Emergency Management: Community preparedness

Quelle (24.1.2006): http://www.avo.alaska.edu/activity/Augustine.php

[crosley]

Hoi Zäme!



um das Bild zu vergrössern, hier klicken.

Quelle: http://earthobservatory.nasa.gov

Grüsse Crosley

[Anja_Magglingen]

ALASKA VOLCANO OBSERVATORY
INFORMATION RELEASE
Friday, January 27, 2006 9:35 PM AKST (635 UTC)

AUGUSTINE VOLCANO (CAVW#1103-01-)
59.3633°N 153.4333°W, Summit Elevation 4134 ft (1260 m)
Current Level of Concern Color Code: RED

An eruption of Augustine Volcano started at about 8:12 PM AKST (0512 UTC). The most vigorous activity began at 8:24 PM AKST (0524 UTC) and lasted about 9 minutes. The eruption ended soon thereafter. Radar information from the NWS indicates that an ash plume reached to about 40,000 feet (12,190 m) and is drifting to the southeast at 25 knots. An ashfall advisory has been issued by NWS and can be found at http://pafc.arh.noaa.gov/augustine.php

http://www.sturmforum.ch/forum_uploads/ ... 075933.png

http://www.sturmforum.ch/forum_uploads/ ... 080103.png

http://www.avo.alaska.edu/activity/Augustine.php

LG Anja
- Editiert von Anja_BEO am 28.01.2006, 08:10 -

[Anja_Magglingen]

ALASKA VOLCANO OBSERVATORY
INFORMATION RELEASE
Saturday, January 28, 2006 12:20 AM AKST (920 UTC)

AUGUSTINE VOLCANO (CAVW#1103-01-)
59.3633°N 153.4333°W, Summit Elevation 4134 ft (1260 m)
Current Level of Concern Color Code: RED

An eruption of Augustine Volcano started at around 23:37 AKST (0837 UTC). Seismicity increased in amplitude rapidly and the eruption duration was about 1 minute, although seismicity was at a high level at the local seismic stations for around 3 minutes. Further episodes of eruptive activity may occur throughout the night. Please refer to our hourly updates for the most recent information on volcanic activity. Ashfall advisories are issued by NWS and can be found at http://pafc.arh.noaa.gov/augustine.php.

http://www.avo.alaska.edu/webicorders/w ... =Augustine

[Anja_Magglingen]

Langsam wird er unruhig...

ALASKA VOLCANO OBSERVATORY
INFORMATION RELEASE
Sunday, January 29, 2006 2:05 AM AKST (1105 UTC)

AUGUSTINE VOLCANO (CAVW#1103-01-)
59.3633°N 153.4333°W, Summit Elevation 4134 ft (1260 m)
Current Level of Concern Color Code: RED

Following the explosion and subsequent ash emission that occurred at 14:30 AKST (2330 UTC) January 28, the volcano has been in a state of continuous eruption, accompanied by persistent ash emission. Since 20:19 AKST January 28 (0519 January 29 UTC) the level of background seismicity increased further, and short-lived, larger pulses have been occurring at intervals. Ash emission is likely ongoing. National Weather Service radar has tracked an ash-rich plume drifting towards the south (extending over Kodiak Island) at up to 14,000 feet above sea level. Satellite imagery indicates a thermal anomaly near the summit of the volcano.

Please refer to our hourly updates for the most recent information on volcanic activity. For current ash fall advisories and wind trajectories, refer to the National Weather Service website: http://pafc.arh.noaa.gov/augustine.php.

http://www.avo.alaska.edu/webicorders/w ... =Augustine
- Editiert von Anja_BEO am 29.01.2006, 16:33 -

[Matthias_BL]

@Anja: Bleib dran !
@Crosley: Danke für das coole Pic !

Danke euch beiden für die Infos.

gruss
Matthias

[Anja_Magglingen]

Jetzt sieht man auch noch was bei Tageslicht... das raucht ja ziemlich

http://www.sturmforum.ch/forum_uploads/ ... 203114.jpg

[Anja_Magglingen]

Latest Observations: Updated hourly

2006-01-29 10:27:19
The level of seismicity remains high. Images from the remote camera on the island show that pyroclastic flows are descending the flanks of the volcano.

[crosley]

Hoi Zäme

...es bleibt spannend und die Bilder sind einfach zum geniessen!

Aktuelle Gallery

Quelle: http://www.avo.alaska.edu/


Grüsse
Crosley