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Index » Radio Paradise/General » General Discussion » volcano! Page: Previous  1, 2, 3, 4, 5, 6, 7, 8, 9, 10  Next
Post to this Topic
buzz

buzz Avatar

Location: up the boohai


Posted: Apr 23, 2015 - 2:35pm

 NoEnzLefttoSplit wrote:

exactly

 
i hate it when lava shoots...
never mind 
KurtfromLaQuinta

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Location: Really deep in the heart of South California
Gender: Male


Posted: Apr 23, 2015 - 2:17pm

 NoEnzLefttoSplit wrote:

my pleasure..

 I guess I am suffering from withdrawal as my favorite volcano blog self-destructed a couple of months ago.

 
I'm glad I heard it. Thanks!
NoEnzLefttoSplit

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Gender: Male


Posted: Apr 23, 2015 - 2:11pm

 buzz wrote:
Earth farts
 
exactly
buzz

buzz Avatar

Location: up the boohai


Posted: Apr 23, 2015 - 1:58pm

Earth farts
Coaxial

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Location: 543 miles west of Paradis,1491 miles eas
Gender: Male


Posted: Apr 23, 2015 - 1:40pm

 NoEnzLefttoSplit wrote:

my pleasure..

 I guess I am suffering from withdrawal as my favorite volcano blog self-destructed a couple of months ago.

 
Good stuff, B, thanks.
miamizsun

miamizsun Avatar

Location: (3261.3 Miles SE of RP)
Gender: Male


Posted: Apr 23, 2015 - 1:29pm

 NoEnzLefttoSplit wrote:

my pleasure..

 I guess I am suffering from withdrawal as my favorite volcano blog self-destructed a couple of months ago.

 
Wired Science - Eruptions
NoEnzLefttoSplit

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Gender: Male


Posted: Apr 23, 2015 - 1:08pm

 ScottFromWyoming wrote:
 NoEnzLefttoSplit wrote:
I am going to tell you anyway  {#Bounce}
 
Thanks!

 
my pleasure..

 I guess I am suffering from withdrawal as my favorite volcano blog self-destructed a couple of months ago.
ScottFromWyoming

ScottFromWyoming Avatar

Location: Powell
Gender: Male


Posted: Apr 23, 2015 - 1:06pm

 NoEnzLefttoSplit wrote:
I am going to tell you anyway  {#Bounce}
 
Thanks!
NoEnzLefttoSplit

NoEnzLefttoSplit Avatar

Gender: Male


Posted: Apr 23, 2015 - 12:45pm



probably nobody wants to know any of this but I am going to tell you anyway  {#Bounce}

First thing that you can see, is that this is a small eruption (I know it doesn't look like it, but it's actually quite small).
This first phase is throat clearing, powered by a lot of gas, resulting in a high degree of fragmentation.
The gas in the magma expands as it gets close to the surface and blasts the magma apart, resulting in a lot of fine ash. This hot ash sucks in
a lot of ambient air, heats it and that's why you get those billowing clouds. The rise of the ash is driven primarily by convection, as you
can see from their shape and not by powerful jetting out of the vent. You can also see it is a small eruption because the column only reaches up to about 10 km before it reaches neutral buoyancy when it fans out. All the heavier ash particles start raining down on the countryside and the lighter stuff will waft away to wherever the wind takes it before also falling out.

Overnight the eruption progressed into lava fountaining, which is also powered by a lot gas but there is no longer enough of it to result in such fine fragmentation. In other words you get lapilli and larger clasts getting expelled violently from the vent, which rain down on the slopes of the mountain. There is less fine ash involved. This is a typical evolution of a small eruption as the first magma will be more gas enriched. Slowly the eruption will wane as the gas content falls until it doesn't have enough oomph to make it out of the vent and the thing goes back to sleep.

So what's next:  
Most likely it will continue to fountain for a few days until it falls back to sleep. However, any movement in a magma system can disturb its equilibrium. It is possible this is just the first sign of a larger eruption and this throat clearing might pave the way for much larger quantities of fresh magma to migrate from depth to the surface. If this fresh magma reaches a point where the pressure is no longer high enough to keep its gas in solution, you can get a much larger eruption happening. Most of the large eruptions I know of, like Pinatubo started of with small eruptions like this. BTW this is not the first one at Calbuco either. Calbuco has had numerous such eruptions recently so it bears keeping an eye on. But this scenario is much less likely than the first one, i.e. the most likely scenario is that it will give us some nice pics, get progressively less violent, finally extrude some thick lava in a dome and shut down.

What's noteworthy about it?
This is the second time we have had an andesitic / rhyolitic eruption occur with virtually no warning, which is not a good thing. These volcanoes are the more explosive ones and we haven't seen many of them erupt in the last 100 years. If they all go off without much warning the authorities are not going to have much time to evacuate people. Chaiten just down the road from Calbuco was the other one. The nice Hawaii type / Icelandic type eruptions usually give us loads of warning, kind of  like a fire cracker where you keep wondering if the fuse has gone out. Calbuco type volcanos on the other hand seem to explode in the box before you even light the match.
Coaxial

Coaxial Avatar

Location: 543 miles west of Paradis,1491 miles eas
Gender: Male


Posted: Apr 23, 2015 - 7:24am

 ScottFromWyoming wrote:


 
Wow.
ScottFromWyoming

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Location: Powell
Gender: Male


Posted: Apr 23, 2015 - 7:10am




NoEnzLefttoSplit

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Gender: Male


Posted: Apr 23, 2015 - 6:19am

 ScottFromWyoming wrote:

A friend who worked at our coffeehouse when she was in college is in Chile now; her boyfriend had a flight to Puerto Montt cancelled yesterday... he was a little upset until he found out why...

 
ha,  imagine being on a flight like that:

"And ladies and gentlemen, to our right we have the lovely graceful cone of - holy shit!" 
Edit, btw, as long as the pilot doesn't decide to actually fly through the ash cloud you should be fine. You'd have to be pretty unlucky to get hit by the shock wave but I guess that's also a possibility. Never heard of it happening though.  Would be a bit like sitting on enola gay I guess.
ScottFromWyoming

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Location: Powell
Gender: Male


Posted: Apr 23, 2015 - 6:06am

 NoEnzLefttoSplit wrote: 
A friend who worked at our coffeehouse when she was in college is in Chile now; her boyfriend had a flight to Puerto Montt cancelled yesterday... he was a little upset until he found out why...


NoEnzLefttoSplit

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Gender: Male


Posted: Apr 22, 2015 - 10:23pm

background info on Calbuco
NoEnzLefttoSplit

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Gender: Male


Posted: Apr 22, 2015 - 10:15pm


NoEnzLefttoSplit

NoEnzLefttoSplit Avatar

Gender: Male


Posted: Apr 22, 2015 - 10:11pm

 KurtfromLaQuinta wrote:

Dang.
Somebody slap a catalytic converter on that pollution device!

Cool video!

 
topical issue ;-)
KurtfromLaQuinta

KurtfromLaQuinta Avatar

Location: Really deep in the heart of South California
Gender: Male


Posted: Apr 22, 2015 - 10:04pm

 ScottFromWyoming wrote:
Time-lapse of a volcano in Chile (today)
 
 

 
Dang.
Somebody slap a catalytic converter on that pollution device!

Cool video!
ScottFromWyoming

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Location: Powell
Gender: Male


Posted: Apr 22, 2015 - 9:51pm

Time-lapse of a volcano in Chile (today)
 
 


Coaxial

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Location: 543 miles west of Paradis,1491 miles eas
Gender: Male


Posted: Oct 2, 2014 - 3:09pm

 miamizsun wrote:

Incredible Close-Up Drone Video of an Erupting Volcano in Iceland

 

first, a bit of an explanation...

 


and then some excellent footage...



 
Very cool.
miamizsun

miamizsun Avatar

Location: (3261.3 Miles SE of RP)
Gender: Male


Posted: Oct 2, 2014 - 2:21pm

Incredible Close-Up Drone Video of an Erupting Volcano in Iceland

 

first, a bit of an explanation...

 


and then some excellent footage...


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