Geologist explains: Lava flow threatens the south-coast road and a farmstead! 

What's the census on the current change? It was quiet for a while, but then it started having surge style eruptions. It's quiet for a while, then it erupts releasing huge amounts of lava, then it's quiet again.

Very informative, thank you.

Thanks for your positive feedback. It seems the rhythm of the eruption is changing from time to time, and there are certainly quite large oscillations in the activity. But, over time the production rate is remarkably constant and the eruption shows no signs of stopping

I reckon the taller the crater font gets, the taller the pressure column becomes, and the greater that becomes the higher is the back-pressure resisting the rise of the column of magma/lava (mass x G). The pressure required to 'push' a standing column out, and over, the crater rim increases. I'll say I'm a bit simplistic now, but I am interested how experts understand ways the increasing flow volume occurs. Much appreciate the input anyway.

Thanks for the date of this footage. I assumed from the shape of the volcano that it was from a while ago. The most recent footage I've seen, the lava output was huge and I suspect much more than 13 cmps. Thanks for your informative videos. Volcanoes are fascinating.

Thank you Deni! This is a huge compliment and it makes us very happy to hear that 🙏🙏

@R Johnson WHAT! and you have nothing productive to add? what are we to make of you sir! . . . find a mirror mate!

@R Johnson -Why even watch?! If you’re so unhappy & need to vent your anger somewhere, go shout into a fluffy pillow. This is all about Natures’s Fury, not yours.

Incredible knowledge of liquids flowing and gravity....WOW, my 3rd grade nephew can talk about that. geesh.

@@rainman7992 -Not if your 3rd grade nephew is in a public school.

I agree!!

On est quelques irreductibles gaullois a suivre ce volcan on dirait 😉

It helps me as an English speaker as well! He was very precise with his wording, the knowledge flowing like lava from his brain through little tubes before being slowly and deliberately extruded from his mouth 🤗

Yeah some mathemathecian and scientist think that the more rapping they do makes them smarter

Keep safe from lockdown uk 🥰

How is snow situation there currently?

Thanks for your positive feedback. Yes, shield volcano is a geomorphological term that describes the shape of the volcano. Google explains it this way: Shield volcanoes are large volcanoes that are built almost entirely of fluid lava flows, and have broad sloping sides and are generally surrounded by gently sloping hills in a circular or fan-shaped pattern that looks like a warrior's shield.

wonderful advice :)

Lars: i live in Arizona, USA. Except for quirks of fate my name would be Lars Sorensen. The spelling of our name changed to Sorenson (Swedish) when my great great grandparents emigrated to the US from Haals Denmark. My name, Larry, was selected to honor my Great Uncle who was loved by my parents but never had children. Here in Arizona we have torrential rains several times a year. The rest of the year it is dry. Throughout our enormous county many roads are paved down into and across the dry stream and river beds that are in many locations. They are called dry washes. When it rains, the roads have been engineered to withstand the flash flooding that occurs across them. It will be bone dry for many months and then, within a few hours of a distant rain, these dry washes change into frightening raging rivers from side to side. As our population has exploded in the past few years many new residents see water in the road and do not understand. As their cars and trucks are swept downstream, the emergency crews are dispatched to save them. Deaths rarely happen if ever. Rescue usually involves emergency personnel wading out to a car mired in mud and knee high flowing water and helping the occupants to safety. This occurs even when flashing barricades are blocking the road. So we citizens all banded together and passed Arizona’s “Stupid Motorist Law”. The law states that anyone who is stupid enough to drive into a flooded wash must reimburse we taxpayers for the costs required to get them out of the mess that they got themselves into. Every year there are pictures of cars and trucks bobbing up and down in the flood water. My favorite was the video of two pretty young girls floating by in a light blue Volkswagen all the while waiving at the onlookers and blowing kisses. It cost them $850 bucks Larry in Arizona

Thank you Terry! Actually they've used my video clips but Olafurs commentary is exclusive to this channel :)

Thank you my friend! I am so happy to see you as the first comment on every video. Respect! Your channel will blow one day. I hope you keep it up!

@@JonBear Thanks Jon! It means a lot 🤩

Going back still further, I remember seeing a film by Tazief in 1962; it was spectacular and some of the things he and his crew did looked, frankly, terrifying.

So in that case I’d guess you’d call this a “vog vlog”

You damn yanks and your damn abbreviations :)

Thanks for your feedback. In Icelandic we use the word "mistur" or "móða". These words are somewhat difficult to translate, mean something close to fog, but I think the term "haze" covers it. So, volcanic haze.

With all this volcanic activity, More is draining into the oceans now than back when only there was only the Hawaiian. So now it seems we need to end our spewing of petroleum to let Mother Nature take her rebalancing course.

I though vog was for volcanic smog rather than fog. But it works either way.

Right..? This comment hits home

Probably how buckets came about

Same here

Thank you Tony!🙏

This is a good question! There seem to be periodic oscillations in the volcanic activity in Iceland, but the reasons for this are not well understood. There are also phases of rift activity across the plate boundaries, that often concur with eruptions. We had a rift episode in northern Iceland in 1976-1983, when the plates moved up to 8 m apart, accompanied by numerous small eruptions. There, these phases seem to occur every few hundred years. The central volcanoes each have their own schedule, with tens of years to hundreds of years in between eruptions. By the way, I am also 1953 model - it was a good year!

I have found some success with Iceland media using Google Translate on the Google app. Previously, once I determined the right terminology and browser tools, I found what I needed, but this volcano was more difficult due to my language limitation.

Thanks for your feedback. It would be nice to document pillows forming under water, and I am sure my colleagues in volcanology will try to set this up if/when the lava reaches the ocean.

Thanks for your feedback. This eruption is unrelated to Hekla and Katla and will not have any effect on their behaviour. Hekla an Katla are different volcanic systems, central volcanoes that erupt from magma chambers, while this is a fissure eruption with magma coming directly from the mantle

Well, kimberlites come from much greater depths and higher pressure than the magma that is being erupted at Geldingadalir. So, unfortunately, no diamonds...

The volume is measured using remote sensing and digital elevation models. Divided by time between measurements gives the volume change per time unit.

Yes he's my dad 😁 he took me to the Highlands on geological expeditions a lot when I was growing up

@@JonBear you're do very lucky to have such a dad, & he's so very lucky to have such a talented son. You both make this world a better place. Thank you.

We will wait until the eruption stops and rebuild the road.

Thanks for your feedback. I do not think we should judge people who get on the lave too harshly... this might be an information problem. Icelanders know how dangerous this practice is, but international visitors might have missed that information and because there is a solidified crust on the lava think it is safe to walk on. We need to make sure everyone knows how dangerous it is to walk on recently flowing lava, and I am sure that will solve the problem

@@olafuringolfsson9151 I'm sorry but, people visiting the volcano already knows how dangerous it is.......lava hot, lava burns is something a child would know.

Engineering like this is difficult, at best, when it comes to lava flows. The lava flows in pulses, and unlike water it can build-up in the channel and overflow at any point. Imagine molten Vax being poured in pulses through a channel, and you will see how this works.

@@olafuringolfsson9151 Thanks for the feedback.

Good point! Better leave once the rain starts

Good question. The answer is no, there will not be any void or hole. There is enormous pressure at 20+ km depth and as some of the magma is siphoned off by the eruption fresh magma flows towards the feeding channel. Once the pressure falls somewhat because of the volume of magma sent to the surface the eruption will stop. It will not leave behind an empty magma chamber that can collapse and firm a hole/cave-in at the surface