Volcanoes Erupting All Over
- Thread starter Laura
- Start date
naorma
The Living Force
What I do not understand:They say that the reason for the eruption has been caused by long and heavy rainfalls. How can that be?
XPan
The Living Force
I read something about
the moments before the eruption: In the public Facebook group "Volcanoes and Volcanism" - a Lavadome collapse occurred 20 minutes prior the main eruption at Semeru Volcano, and then generating a pyroclastic cloud during the eruption phase (My personal assumption however is, that the collapse must have something to do with the main eruption after all in order to trigger a hot pyroclastic cloud. I do not believe that a collapse alone is responsible for a (hot) pyroclastic cloud. You need pressure and heat for it to eject). After the eruption the heavy ash mixed with the rainfalls, creating lahar mud flows, destroying/burying everything in their way.
So, from what I understood, it wasn't the rainfalls themselves responsible for the eruption.
What rainwaters can do (other than creating mud flows, I mean) is, that when the water sinks down into the ground, interacting with warmer regions, triggering micro earthquakes. This was written only recently about the Campi Flegrei (Puzzuoli, Napoli, Italy) - where the rainwater takes 14 days to reach 2500 meter deep into the ground, interacting with the warmer/hotter regions there, leading up to increased micro earthquake activity.
Ah, I found it...
Vulkane.net by Marc Szeglat
4 Dec 2021
the moments before the eruption: In the public Facebook group "Volcanoes and Volcanism" - a Lavadome collapse occurred 20 minutes prior the main eruption at Semeru Volcano, and then generating a pyroclastic cloud during the eruption phase (My personal assumption however is, that the collapse must have something to do with the main eruption after all in order to trigger a hot pyroclastic cloud. I do not believe that a collapse alone is responsible for a (hot) pyroclastic cloud. You need pressure and heat for it to eject). After the eruption the heavy ash mixed with the rainfalls, creating lahar mud flows, destroying/burying everything in their way.
So, from what I understood, it wasn't the rainfalls themselves responsible for the eruption.
What rainwaters can do (other than creating mud flows, I mean) is, that when the water sinks down into the ground, interacting with warmer regions, triggering micro earthquakes. This was written only recently about the Campi Flegrei (Puzzuoli, Napoli, Italy) - where the rainwater takes 14 days to reach 2500 meter deep into the ground, interacting with the warmer/hotter regions there, leading up to increased micro earthquake activity.
Ah, I found it...
Vulkane.net by Marc Szeglat
4 Dec 2021
XPan
The Living Force
Grímsvötn • Iceland
6 Dec 2021 - (1725 meter / 5659 ft)
Aviation Code Orange. Icelandmonitor writes that Code orange has been called out for the big gun volcano, Grimsvötn
6 Dec 2021 - (1725 meter / 5659 ft)
Aviation Code Orange. Icelandmonitor writes that Code orange has been called out for the big gun volcano, Grimsvötn
To those of you in La Palma. Does anyone understand this?
@tvlapalma IGN says it's a volcanic tube, then Pevolca says it's a fissure... I don't understand anything...why don't they clarify this?
The volcano begins to emit quite a black cloud of ash. It has not been for days. And just with the wind shift that brings it to the area of El Paso and the valley.
At least 22 people are dead and 20 more are still missing after Semeru volcano erupted on Indonesia's Java island.Semeru volcano has erupted, spewing ash 15.2 kilometers into the sky.
Posted by Teo Blašković on December 4, 2021
High-level eruption at Semeru volcano, ash to 15.2 km (50 000 feet) a.s.l., Indonesia
A high-level eruption took place at Semeru volcano, East Java, Indonesia at around 08:20 UTC on Saturday, December 4, 2021. The Aviation Color Code was raised to Red. The eruption comes just two days…watchers.news
4 Dec, 2021
Residents flee massive ash cloud from erupting volcano (VIDEO)
A volcano erupted on the Indonesian island of Java on Saturday, reportedly obscuring the sun with a massive cloud of ash, and sending locals into a panic.www.rt.com
Published on Dec 4, 2021 (1:36)
At least 22 die after volcano eruption in Indonesia — local authorities
Five bodies have not yet been identified, a spokesman for the local emergencies agencies informed
tass.com
Semeru volcano (East Java, Indonesia): death toll rises to 22 killed while volcano remains active
Latest news and updates about the volcanic activity of mt Semeru volcano, East-Java (Indonesia)
www.volcanodiscovery.com
Published on Dec 6, 2021 (1:40)
Some footage from Twitter detailing the uptick in activity at volcano Grímsvötn and the glacial flooding (mentioned in your post above) that followed:
1st post: 'The last flyby of the ice cap at Vatnajökull shows that part of the ice sheet covering the volcano's craters Grímsvötn is collapsing. The volcanic danger traffic light has been raised to orange due to the recent earthquakes and collapses.'
2nd post: 'The boiler limits of Grímsvötn also show shear and collapse effects. After the water comes out, the volcanic system is losing pressure which may generate an eruption in the next few days, creating plumes of steam and ash.'
' The water that was under the glacier that covers the volcano Grímsvötn , began to come out. A Jökulhlaup began to be created that rose more than 4 m, it is a matter of days before we begin to see columns of steam and ash in the main crater.'
Could this be the cause of the seismic swarm off the Oregon coast?
From 2019
Scientists Are Studying a Massive Underwater Volcano off the Coast of Oregon
From 2019
Scientists Are Studying a Massive Underwater Volcano off the Coast of Oregon
That's an interesting question. The recent series of earthquakes do sound similar to what happens around a volcano before it erupts... i.e., magma moving.
