This Week in Volcano News; Unexpected Dempo Eruption, Damaging Iceland Lava Flow

[@timhazeltine3256]

Frankly, If the volcanic eruption cycle in Iceland continues for many years, the blue lagoon and power plant will likely be further impacted.

[@williamlloyd3769]

Worst then loss of power is that the geothermal plant waste heat is used to heat the water in the loop that heats almost every home on the Reykjanes peninsula.

[@donaldduck830]

The only thing we can do is watch and pray. The locals keep on building and maintaining the berms. Without them, the damage would already have been done.

[@MeanOlNana]

I think I read somewhere they are working on a new power plant. Just need time to finish it.

[@Jeremyb019]

The FACT IS THIS IS GONNA KEEP GOING ON FOR YEARS BECAUSE OF THE MAGNETIC POLE SHIFT. Not only that but all the volcanoes on Iceland will start erupting the magnetic pole shift is an extinction level event. If you want more info you can visit Suspicious observers channel

[@wendyh2708]

Let's be honest, the Blue Lagoon and the power plant are both living on borrowed time.

[@luannvondracek439]

These weekly updates are very appreciated and timely.

[@TheSpaceEnthusiast-vl6wx]

Thanks as always, Geology Hub!

[@deborahferguson1163]

I appreciate all the work you put into these videos. Thank you GH!!

[@scrappydoo7887]

You have some Great info and footage there bud 👍👍

[@Joe-e4g7q]

I was wondering for the last 5 yrs about northern Japan. Been awhile since anything happened there. Great weekly update thanks

[@thrutheblinders]

Thank you for your updates! I really enjoy your channel!

[@Vesuviusisking]

Keep up the amazing videos

[@jop4649]

I hope there will be a video covering the Towada volcano. Highly recommend researching it's 915 AD eruption.

[@xwiick]

Thanks for all the hard work on these videos!

[@davinautting3198]

Thank-you ❤

[@kaoskronostyche9939]

Thank you .

[@paulw3182]

Watch every video - Thanks for the update on Iceland. Japan is troublesome, thanks for keeping a watchful eye.

[@capnkwick4286]

For volcanoes that have formed a large caldera, there seems to be a perception that an immense eruption will occur. Would it be just as likely that a "normal" sized eruption that continued for an extended period of time would produce the same results (amount of ash emitted plus emptying the magma chamber)?

[@brianorca]

I'd guess no. Continuous low level eruptions would produce more lava flow or a series of small calderas.

[@Leyrann]

Usually, no, but sometimes, yes. Kilauea formed a caldera after a decades-long effusive flank eruption ended in 2018 - the sinking of the caldera can even be seen on timelapses! And GeologyHub has in fact included that footage in some of his videos. However, you need to look no further than volcanoes like Yasur and Stromboli to see that a continuous low-intensity eruption doesn't _usually_ cause calderas to form. My personal suspicion (I'm not an expert) is that these long-lasting eruptions tend to happen when the system is continuously refilled with magma, but the magma chamber itself is limited in size. Whereas major eruptions are fed by large magma chambers which then empty at once and form a caldera. Also, if you were to look at the island chain of Nusa and Flores in eastern Indonesia (basically, Bali and what's east of it), it's clear that geological setting (and presumably magma composition as a result) are major factors in caldera-forming eruptions - in this area, almost every volcano has it's own caldera, showing all of them have had a catastrophic eruption at some point. Tambora is the most recent of the bunch, in fact. Meanwhile, in other volcano chains around the world you might only find a few calderas, or even none at all. Long story short, certain volcanoes and eruptions are much more likely to form calderas than others.

[@Dragrath1]

Indeed most eruptions from large caldera complexes are not large explosive eruptions but these volcanoes do generally have many of the circumstances needed to generate these large explosive eruptions. That said extending the time a volcano is erupting in a "normal" manner isn't going to produce the same results as a large explosive eruption because the underlying physics for large eruptions appears to be quite distinct Duration of an eruption is important as is the amount of eruptible melt within its plumbing systems but it also seems to be important for there to be large scale thermodynamically driven magma mixing on a short enough timescale to prevent more passive modes of releasing latent heat pressure. This seems to be able to occur in several ways whether in the form of volcanic rejuvenation i.e. a large volume of fresh hot magma intrudes into an active yet largely crystalized evolved melt mush releasing large amounts of latent heat through induced crystal fractionalization as minerals precipitate out of the magma and undergo chemical reactions that release latent heat or two or more chemically distinct previously isolated melt bodies getting brought into contact. Normally such latent heat would slow and or halt the reactions but if you have some process such as convection transporting that latent heat elsewhere in system the reactions can continue letting more heat accumulate and producing siliceous gas rich melt ready to erupt. These systems are complex hence why each caldera complex behaves differently but the basic recipe for large explosive eruptions based on the study of the crystal chemistry of large voluminous eruptions seems to be large volume of eruptible material evolved crystalline mush melt and a hotter more chemically primitive gas rich magma going on to mix on short time scales with the shorter the duration for a given amount of magma ultimately leading to a larger more abrupt explosive eruption.

[@frankhoffman3566]

Iceland is the Indonesia of the North Atlantic.. So many volcanoes

[@chimknee]

Thanks.

[@swainscheps]

1:37 the fissure king?

[@Burl-tw1yu]

..nice

[@rbtjan]

The Towada unrest reminds me with the recent series of earthquakes in the lake Toba, they are small around 2 or 3 Magnitude, but somehow have a really shallow depth around 1 to 3 km. I don't really know if this is actually true or if there's something wrong with the sensor, but it's still fascinating

[@phonehenge]

As a reference for me, what was Krakatoa and Pinatubo and Tambura on the Vei scale?

[@xwiick]

1883 eruption of Krakatoa is rated 6, 1991 eruption of Pinatubo is rated at 6 and 1815 eruption of Mount Tambora is rated at 7

[@wandabissell]

Isn't there an eruption in Kamchatka?

[@Leyrann]

Pretty sure there's a few continuously erupting volcanoes over there.

[@Silverfurry89]

You have great content. But I would like that clips used has location and dates and weather it is from the location discussed or just a visualization from an other location and date.

[@swainscheps]

He usually includes an onscreen note if he’s showing a feature or event that is similar to (but not actually) the feature or event he’s discussing. GH is one of the more detail-oriented and scrupulous content creators and re-purposes you’ll find.

[@ml.2770]

The blue lagoon is going to become the red lagoon sooner or later.

[@MultiverseTechnologies1994]

I Calculated a dempo Eruption

[@jjsmallpiece9234]

What is the longest known time between the same volcano erupting? How common is it for apparently dormant volcanoes to erupt again i.e. those under known geological science thought to be dormant that have erupted again?

[@danielhertz7266]

@GeologyHub can you please give us a chart or graph of how much total ash/SO2 has been ejected since the start of 2024?

[@Earthneedsado-over177]

The chances are pretty low that I would be personally impacted by a volcano (you never know) but I still feel like I should be aware what is going on around the world. Thank you for keeping me informed about this most interesting topic.

[@TooSlowTube]

1:50 since the Iceland eruption was smaller because it was early, would Icelanders benefit from drilling to tap lava at an earlier stage, letting off mini controlled eruptions?

[@edwardlulofs444]

This issue has been discussed before: To the best of my understanding, drilling into a magma chamber loses the bit and is too small for lava to move through. All aspects seem negative.

[@TooSlowTube]

@@edwardlulofs444 I'm not sure how much a bit costs compared to, say, replacing a large car park, but the next stage would presumably involve some blasting, to make a larger hole for the magma.

[@susandavidson1691]

Nothing like letting nature take its course

[@edwardlulofs444]

@ one rig drilled into a magma chamber and they lost millions $ So you would like to start blasting a pit down 4 miles? I have not heard anything about this.

[@TooSlowTube]

@@edwardlulofs444 Next time it erupts, or maybe the time after that, they could lose the power plant and the Blue Lagoon tourist attraction, so a budget of millions would not be out of the question if that could be avoided. At some point before it erupts, it's a lot closer to the surface and since the lava always flows downhill from where it erupts, there is potentially somewhere nearer sea level that could be drilled from, giving a choice in where the lava flows.

[@whiteknightcat]

The longest erupting volcano is Yasur? Yessir!

[@jamesleatherwood5125]

Whats the difference between plinian, sub plinian, and ultra plinian?

[@AussiePrepper152]

Terrestrial physics is predicting the largest eruption in the last 1,000 years,will occur by 2025’s end… which one could it be?

[@goodwaterhikes]

😎👍

[@sheilaathay2034]

🌋❤️‍🔥

[@Flame-Bright-Cheer]

🤘🏼Right on rhyolite🤘🏼

[@stvrob6320]

You use entirely too many significant figures.

[@shineyrocks390]

Cheesecake is delicious

[@GentlyUsedOreos]

Wow! First like & first comment! Woot!

[@charlesokeefe8788]

It seems like you're referring to a term related to a volcano, possibly from Greek or Latin origins. If the word is "venatauto", it might be a misspelling or variation of a term involving the roots: "Vena" (Latin for "vein" or "channel," which could metaphorically describe lava channels or volcanic vents). "Auto" (Greek for "self" or "by itself"). However, this exact word does not appear in classical Greek or Latin. Could you clarify its origin or context? If you're referencing a specific mythological or geological term, providing additional details could help pinpoint its meaning. Means to stand or rise

[@JarnoOverwijk]

He says "Vanuatu", an island nation in the Pacific. Not even remotely "venatauto".