[Rockhounds] Two supervolcanoes, a world apart, have the attention of scientists

[Dora Smith]

I've followed these volcanoes recently.  There is no evidence that 
either is "springing to life".  Also, the Campi Flegrei volcano has many 
small daughter volcanoes that explode regularly and don't do much harm, 
as measured by deaths of people not stupid enough to live on the sides 
of an active volcano that explodes every decade or two.

Yours,

Dora Smith

On 11/1/23 12:33 PM, Kreigh Tomaszewski wrote:
> Two long-dormant “supervolcanoes” on two separate continents appear to be
> stirring to life. Well, maybe.
>
> In recent months, more than a thousand minor earthquakes have rattled the
> area around the Campi Flegrei volcano in southern Italy, stoking fears that
> it may soon erupt again after nearly five centuries. Some 6,000 miles away,
> scientists have for decades recorded similarly small earthquakes and
> instances of ground deformation at the Long Valley Caldera, a volcano in
> eastern California that sits adjacent to Mammoth Mountain.
>
> But does all this seismic unrest really portend a volcanic eruption
> <https://www.nbcnews.com/video/lava-spews-into-the-air-after-volcano-erupts-in-southwest-iceland-187614789745>?
> It sort of depends on whom you ask.
>
> Most experts say there is no immediate threat of an eruption at either Long
> Valley or Campi Flegrei. Both volcanoes are calderas — sprawling
> depressions created long ago by violent “super-eruptions” that essentially
> collapsed in on themselves — which are often more challenging to forecast
> compared to the large mountain-shaped features that people typically
> imagine when they think of volcanoes.
>
> Seismic unrest can be a sign that a volcano is waking up, but the full
> story is much more complex.
>
> https://www.nbcnews.com/science/science-news/supervolcanoes-earthquakes-flegrei-long-valley-caldera-rcna121781
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