Vikings Volcanic Activity Thread

[PB22]

Where's SC gone! :lol:

AVO has re-analyzed the event reported as an explosive eruption at Redoubt volcano occurring at approximately 23:14 AKDT on March 29 (07:14 UTC March 30). At that time, there was heightened tremor, however, seismic and infrasound data do not show clear evidence that an explosion occurred and this will not be categorized as an explosive eruption.

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

Nonetheless, eruption clouds of up to 20,000 feet continue to be reported at times.

The Hut webcam looks a little clearer this morning:

http://www.avo.alaska.edu/webcam/Redoubt_-_Hut.php

[Guest Shetland Coastie]

UPDATE - REDOUBT

A bit quieter today with seismicity having settled down again (probably famous last words!). Heres something for you to have a look at, the SO2 clouds from Redoubt have been picked up by the GOME2 instrument aboard the European Met-OpA satellite. Theres an aninmation here (thanks again to Lady Pakal for the heads up):

Redoubt SO2 cloud

Its about half way down the page.

:lol:

[PB22]

UPDATE - REDOUBT

A bit quieter today with seismicity having settled down again (probably famous last words!). Heres something for you to have a look at, the SO2 clouds from Redoubt have been picked up by the GOME2 instrument aboard the European Met-OpA satellite. Theres an aninmation here (thanks again to Lady Pakal for the heads up):

Redoubt SO2 cloud

Its about half way down the page.

Ah there you are! :lol:

Wow, thats an impressive animation! Come on Redoubt, keep going then we may get to witness some fantastic sunsets!

[Guest Shetland Coastie]

UPDATE - REDOUBT

The hut webcam has partially cleared and you can see part of the steam column emanating from the summit. Hopefully as the sun rises and the snow melts off we'll see a bit more. AVO are saying they hope to get a flight up today for a look-see.

Hut webcam

Edited March 30, 2009 by Shetland Coastie

[Guest Shetland Coastie]

Would somebody like to go and rub that crap off the left hand top corner of the Hut webcam please, can't see a damned thing :lol:

[PB22]

Would somebody like to go and rub that crap off the left hand top corner of the Hut webcam please, can't see a damned thing :lol:

I volunteer!

[Guest Shetland Coastie]

UPDATE -REDOUBT

Currently on the Hut webcam you can see an ongoing ash emission whic AVO estimates has gone up to about 20,000ft.

[Guest Shetland Coastie]

EARLY WARNING OF POSSIBLE ERUPTION - NYIRAGONGO/NYAMULAGIRA - DR CONGO - AFRICA

Scientists in the central African state of the Demorcratic Republic of the Congo are warning of the impending eruption of either Nyiragongo or Nyamulagira. The reason for the uncertainty is because the rising seismic activity is ocurring between the two volcanos, but it is thought that the eruption is most likely to be from Nyamulagira.

According to Dieudonne Wafula of the Goma Volcano Observatory (OVG) "There is heavy activity around Nyiragongo, but it's more centred on Nyamulagira, around 13 km (8 miles) away." An eruption in this area would be a potential disaster given that the population is swollen by hundreds of thousands of refugess from the interminable civil strife which has beset DR Congo in recent years. Near-neighbour Nyiragongo erupted in 2002 sending a lava flow straight through the town of Goma, killing several and displacing almost 400,000 people.

Of the two, Nyiragongo is by far the more dangerous. It is classified as a "Decade Volcano" due to its proximity to a population centre and its past, violent eruptive history. What is more, it has recently been discovered that Nyiragongo may sit on top of a Mantle Plume and erupts very pure lava from deep within the earth, which has been unadulterated by the overlying rocks. As a result, its lava is very fast flowing. During the last eruption in 2002, at peak flow, the speed of its lava was measured at 60mph!!

One to watch out for.

[mcweather]

Have only just come across this brilliant and interesting thread very interesting stuff. Keep up the great work

[Guest Shetland Coastie]

Thanks mcweather :lol:

UPDATE - REDOUBT

Redoubt has now been belching out ash for 2 hours solid now. The US National Weather Service estimates the height of this ash column at 20,000ft. No ash fall advisories have been issued at the moment but that could well change. This ongoing event can be seen on the Redoubt Hut webcam which is fairly clear for the first time in ages!

Hut webcam

Edited March 30, 2009 by Shetland Coastie

[Louby]

Wow it looks awesome! thank ye kindly Bob. Do you know how often that cam updates its picture?

[Guest Shetland Coastie]

Wow it looks awesome! thank ye kindly Bob. Do you know how often that cam updates its picture?

I think its every 10 mins but not absolutely certain. :lol:

[Louby]

cheers Bob :lol:

is that the sun through the ash or something else?

picture from http://www.avo.alaska.edu/webcam/Redoubt_-_Hut.php

[Guest Shetland Coastie]

Yes its the sun. If only we could get rid of that smudge of crap in the top left we'd have an excellent view!

Edited March 30, 2009 by Shetland Coastie

[karyo]

Yes its the sun. If only we could get rid of that smudge of crap in the top left we'd have an excellent view!

An eagle must have used the webcam as a toilet! :lol:

Nice to see Redoubt so active!

Karyo

[ukweathergirl]

Rather brave bird to be flying near the volcano....very annoying too but interesting picture even if there is a horrid smudge though it!

[PB22]

The smudge in the top left corner has all but gone now! :lol:

[Guest Shetland Coastie]

UPDATE - REDOUBT

Seisimicity is still elevated this morning with regular earthquakes. According to AVO the volcano is still emitting a steam/ash plume up to approx 20,000ft.

[Guest Shetland Coastie]

UPDATE - REDOUBT

Seismicity appears to be on the increase again. The volcano is sending a steam/ash plume up to approx 25,000ft. AVO state satellite imagery shows a strong thermal anomaly at the summit which suggests the growth of a new lava dome.

[PB22]

Good morning Redoubt!

[Guest Shetland Coastie]

UPDATE -REDOUBT

Indeedy Paul. Currently the volcano is emitting a low-level plume. Seismicity has been fairly elevated but stable most of the day.

Been at work today (overtime) and been busy with a job this afternoon (medivac from an oil platform) hence the lack of updates, fortunately is been quietish at Redoubt today.

-_-

[Guest Shetland Coastie]

UPDATE - REDOUBT

There was a small explosion overnight at approx 0007 our time which produced an ash column up to 25,000ft. Constant low level gas and steam emissions continue and this is fairly consistent with the behaviour of the volcano during the last eruption in 1989-90. Further bursts of very explosive activity can be expected.

Some pictures below from an overflight/fieldwork carried out yesterday by AVO, first picture courtesy James Isaak AVO, other two Game McGimsey AVO:

Edited April 1, 2009 by Shetland Coastie

[Guest Shetland Coastie]

UPDATE - REDOUBT

The volcano has been continuously emitting steam and ash all day today. Good views from the Hut webcam at the moment which is fairly clear:

Redoubt Hut webcam

[Guest Shetland Coastie]

Interesting article on how latest research shows that volcanic plumes act rather like Tornados. A volcanic eruption can spontaneously form a "volcanic mesocyclone" which sets the column rottating on its axis, creating lightning, waterspouts and dust devils, the research has found. The article can be found here:

Science Daily article

[tundra]

According to John Seach who is a volcano researcher, Anak Krackatau in Indonesia has erupted with an ash plume to 2.7km.

Edited April 2, 2009 by tundra