[HN Gopher] Italian supervolcano "Phlegraean Fields" is showing ...
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       Italian supervolcano "Phlegraean Fields" is showing signs of waking
       up
        
       Author : MPSimmons
       Score  : 30 points
       Date   : 2024-11-23 04:05 UTC (1 days ago)
        
 (HTM) web link (www.earth.com)
 (TXT) w3m dump (www.earth.com)
        
       | ajb wrote:
       | As a non geologist, what's the significance of the gases starting
       | to come from near-surface fluids rather than deep magma? Naively,
       | I would be more worried about the magma as that's what comes up
       | in an eruption. But they seem to be worried that the gas source
       | has changed to subsurface fluids?
        
         | monkeydreams wrote:
         | Also non-geologist, but my understanding is that the gassing is
         | a sign of "frothing", active magma. It's the difference between
         | boiling just water in a saucepan, and boiling water and pasta -
         | the latter will result in the saucepan overflowing.
         | 
         | I believe that the switch in out-gassing behaviour suggests
         | that the magma viscosity and gas levels have hit a critical
         | point that means that the field is more likely to erupt.
        
       | rscho wrote:
       | This makes me think I'm gonna start increasing non-perishable
       | reserves for my family.
        
       | gmuslera wrote:
       | That belongs to the missing row of my "what can possibly go
       | wrong?" bingo.
        
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       (page generated 2024-11-24 23:02 UTC)