Incandescent debris flow? The hell is that?

@@SirKolass When volcanos erupt, the form of the lava varies according to the amount of silica or silicon dioxide that is incorporated into the molten mixture. When the silica content is below 47% the lava will be very fluid, like the basaltic magma that is erupting in Iceland. Increasing amounts of silica will produce dacite, andesite, and rhyolite that gets stiffer and pastier as the silica content increases. Eventually it gets to the point where it does not flow, but extrudes like toothpaste from a tube. If the magma has high concentrations of gases such as sulfur dioxide, carbon dioxide, or di-hydrogen oxide, (also know as water that will be present as super-heated steam) when the magma reaches the surface it will explode in a gassy, glassy froth of burst frozen glass bubbles (called volcanic ash) at more than 1000 degrees Celsius. The column may rise vertically from the vent at the speed of sound to a height of 7 to 10 mlles (10 - 15 Kilometers). When the ash column runs out of lift it will collapse back onto the volcanic cone and surge down valleys at speeds of up to 300 kilometers per hour at a temperature of 1000 degrees, incinerating every living thing in its path. The flow consists of several meters of a very hot dry mixture of ash and pumice with boulders up to several meters in diameter, covered by a blinding cloud of choking red hot ash.These kinds of eruptions are normally seen in volcanic arcs like the Cascades in the United States, Japan, the Andes of South America the Windward Islands of the Caribbean, the Aleutian Islands of Alaska, and the entire island chains of Java and Indonesia. Hawaii and Iceland usually have low silica basalt flows that flow slowly on the surface and can be approached on foot for collection of fresh lava samples in some cases, if proper precautions are taken. In 1991 a group of 40 journalists and scientists that had observed several smaller pyroclastic flows on Mt Unzen in Japan were, caught and killed by a later flow that was slightly larger. Maurice and Katja Krafft, two French volcanologists, and American Harry Glicken died in the event. You may think you have adequately assessed the risks to closely approach an eruption, but volcanic eruptions are very unpredictable, and can change direction and intensity with no notice. Search You Tube for “Unzen 1991”.

@@charlesward8196 Yeah, I know what pyroclastic flows are. I'm asking you what what's a Incandescent debris flow, I've never heard this term before.

@@SirKolass A pyroclastic flow is not only made of hot ashes gases. It also carries a lot of materials , from fragments of blocks coming directly from the collapsed part of the lava dome , to anything else crossing the path of the flow and being taken away because of its power. That would explain the use of the terms "debris flow". And for incandescent well it's easy to understand that this pyroclastic flow is very hot inside: when the lava dome collapses , its lava blocks are brutally and quickly degassing as the same time as they are pulverized into ashes, this phenomenon being helped and accelerated by the steepness of the flancks of the volcano , in one word helped by gravity. That's why by night it is possible to witness red glowing parts inside pyroclastic flows (like with 2014 gunung Sinabung eruptions for example) So the person above was probably talking about these very hot lava blocks of a pyroclastic flow , moving slowly here but still collapsing fast enough to generate hot gases and pulverised material all around.....

@@drixc1 You're confusing pyroclastic flows with pyroclastic surges. Pyroclastic flows are only ash and gas, pyroclastic surges are solid walls of debris that flatten everything on their way. The flows in Sinabung didn't glow, they were just being lit by the lava below them, pyroclastic flows don't glow.

Guatemala

Guatemala el pasi con 34838382839382 volcanes activos a la vez

@@davidxd117 alv

Bruh this was hardly a big deal...

That area is very desolate for the most part

Up close and personal. When he rotates his shot, you can tell that he is very close. One step short of an insane place to be. Nah, that is an insane place to be. He wouldn't know until it would be to late if there were a following flow that outsized what he just watched.

@@bluebalute Making video and getting lucky. Trying to imagine what it would feel like to have that innocuous looking dust cloud slide around the ankles as one realizes one's boots are melting and one is going down. It would be instructive to scan a flow at that proximity, with an infrared thermometer, so people could understand the extreme danger.

@@RAMelloh-ij5sl :) I doubt the infrared readings would be enough to influence some people butttttttttttttt the melting boots might do the trick.

Volcanic ash clouds create lightning easier than water vapor clouds. You don't see it here because this flow is very small.

It has to be a violent eruption for lightning to happen

Look at the eruption of Fuego volcano in Guatemala in 2018. Absolutely one of my favorite pieces of footage. It's fascinating and terrifying in equal measure.

6 years late lol but to change it with time it's sin(sqrt(x^2+y^2) + t) where t is time. You can also change the location of the wave "source" by adding a constant value to x or y before squaring it.

Jorge Lopez 18 segundos.

algo como esto: n1=10; x=linspace(-20,20,n1); y=x; z=x; a=zeros(n1^3,3); i4=1; for i1=1:length(x) for i2=1:length(y) for i3=1:length(z) a(i4,:)=[x(i1) y(i2) z(i3)]; i4=i4+1; end end end r=sqrt(a(:,1).^2+a(:,2).^2+a(:,3).^2); p=0:0.05:25; A=1; figure pause colormap cool axis vis3d vob=VideoWriter('C:\Rudiger\ondas_esfericas_3D_v2.avi'); open(vob); for i1=1:length(p) dr=A*sin((r+p(i1))*pi*2); drx=a(:,1).*dr./r; dry=a(:,2).*dr./r; drz=a(:,3).*dr./r; x2=a(:,1)+drx; y2=a(:,2)+dry; z2=a(:,3)+drz; hold off; plot3(a(:,1),a(:,2),a(:,3),'.b'); hold on quiver3(a(:,1),a(:,2),a(:,3),drx,dry,drz,'linewidth',2,'MaxHeadSize',0.5) axis equal grid on axis([-1 1 -1 1 -1 1]*25) view(25+i1/5,15) F=getframe(1); writeVideo(vob,F); end close(vob)