pyroclastic flows


Explosive eruptions of Sakurajima volcano, Japan, earlier this summer. The video jumps around a bit but in the opening explosion you can see how some of the material that traveled upwards as ash collapses back downwards to form a pyroclastic flow on the slopes of the volcano.

Also, don’t miss the “dust devil” made of volcanic ash in the last frames.


Sinabung volcano at dusk after the major pyroclastic flow on August 2nd. You can see the scarred path taken by the previous flow and now exposed fresh lava, probably now glowing after a dome collapsed to produce the large pyroclastic flow. As lava continues moving up, it will trigger more, smaller pyroclastic flows like this one.


The Indonesian Volcano Sinabung was extremely active last week, sending up several clouds of ash. That ash used to be magma that was in tact in its neck, but gases in that magma fractured it into ash. During the eruption, super-heated gases and ash mix together and rise upwards because the combination of ash and hot gas is still denser than the atmosphere. However, when it zooms in look for the small areas of ash that seem like they’re falling off the side. These are small pyroclastic flows coming off the main ash cloud. They form when part of the ash cloud becomes too dense - either too much ash or becomes too cold. They are still several hundred degrees C and begin moving down the volcano in channels - these are the parts of an eruption like this that can damage and kill.

Okay so being in the UK nothing as crazy as most of the stuff on this blog has ever happened but there’s one moment I’ll never forget as long as I live.

There was this one guy in my class, let’s call him B, who was infamous for asking the dumbest questions ever.

So this one week was the first time we had our new geography teacher and we were in the middle of our unit on tectonics and were specifically looking at volcanos. Mr C, the teacher, brought up pyroclastic flows and how they’re superheated ash and everything’s fine but then B opens his big mouth and asks something that just baffled me.

“So if you were wearing a suit full of liquid nitrogen and you stood in a pyroclastic flow, could you survive?”

And I swear I’ve never heard a dumber question in my whole goddamn life

Why yes, that there is a traced overlay of the Zelda II world map superimposed on the world map of Breath of the Wild. My my, that’s quite a claim: what could have *possibly* made so much sea water disappear?

The game tells us, actually: during the “Leviathan Bones” side quest, Akrah and his colleagues are researching into the great Leviathan (lit. whale) bones scattered about Hyrule, with the great ones being said to rest in Eldin’s Deplian highlands, Hebra’s north slope, and Gerudo’s Dragon’s Exile. Taking photos with your Slate of each of these massive fossils will result in these scientists giving their theories on what caused the deaths of these mysterious giants: death by a volcanic eruption; death by Ice Age; death by drought.

What if I told you, all three happened…in that order?

The quite active volcano beneath the “Valley of Death” in Eastern Hyrule must have erupted quite violently, raising itself up higher from the shallow seas, buckling and breaching the water’s surface to form a grander cone: the heat of this intense eruption—and its likely massive pyroclastic flow—decimated the surrounding regions, killing the first leviathan.

The after effects of this eruption were felt almost immediately: the ash and particulates clogging the skies, dropping the temperature worldwide, and leading into a dip in the climate, with less sunlight breaking through the ash-choked clouds…leading into longer, harsher winters—highlands glaciating under pack ice—leading to the death of the second leviathan.

Now, as the climate is cooling and the air mass is drying, less frequent rains for a period of time leads to a massive drought, culminating in the death of the final leviathan.

These three consecutive changes combined would lower the sea level dramatically, and it is *exactly what we see*! The inland Cliffs of Quince and the upper cliffs of Loshlo Harbor, in southeastern Hyrule, exhibit weathering typical of tidal erosion: yet they’re far above the current sea level. And then there are the numerous *other* bones scattered about Hyrule, seemingly from giant serpents and whales alike—the proverbial sea creatures of the deep. And last but not least, there’s rock salt: a product of the desiccation of the “ancient seas”.

Let’s not even mention how so many of the landforms and locations line up near-perfectly between these two overworlds (Spectacle Rock, Maw/Valley of Death [Mountain], Rauru, the river sources of Saria, swamps and marshlands, Maze Island, etc.)


On August 2nd, Sinabung volcano in Indonesia unleashed one of the largest pyroclastic flows of its now years-long eruptive phase. I think this is the only video I’ve found that catches some of the pyroclastic flow moving down the slopes. A number of press reports have featured captured video of the massive ash cloud tossed up by the flow - I’ll share that video next, but I’m using this one of the moving flow first.

A pickup truck flees from the pyroclastic flows spewing from the Mt. Pinatubo volcano in the Philippines, on June 17, 1991.  Behind it, the searing hot, bone-charring ash charges with the speed of a jet engine, preparing to swallow the car whole and burn the occupants alive. As you can see, it is a hot and dense cloud that is literally thousands of times bigger than the car it’s chasing. This was the second largest volcanic eruption of the 20th century.

i hate hate hate hate that post going around of the two dead Pompeii victims that were actually two men in a loving embrace. all i see are comments like “LMAO HE WAS SUCKING DICK RIGHT UNTIL THE END!!!!!” because of the odd position they’re in

that is so fucking disrespectful and disgusting. these two men, and all Pompeian victims, died horrible, awful, nasty deaths. They saw the rushing pyroclastic flow race towards them, with gas so hot, your blood boils and your brain vaporizes. Your bones literally explode. They were scared. They didn’t know what was happening other than imminent death. And in their final, harrowing moments they chose to embrace and comfort each other as they waited for it to end.

And all you see is an opportunity to sexualize them. Shame on you.

god damn it im so impressionable like dave strider has brought out the most of my dave-like personality in me and its not even ironic anymore like this shits for real
like even writing a paper for school or something i go off on this tangent and i gotta stop myself but ive grown too attached to what i wrote
otoh i guess this is my new creativity channel when i cant find anything to draw because words flood out of my mouth like a winding river and theres a kayaker who cant row against my ridiculous pyroclastic flow (unintentional rhyme but nice) of long winded bullshit

i can pull it out of my ass on a dime i dont even need to think about it in a literary context like with these extended metaphors n shit i do think about how it could affect other people though but yeah dave just comes naturally i always had that kinda

coping with humor thing
and jokes under irony stacking up to the size of a ten story building that only a very select few people can fully appreciate

and i guess now that im living in the south im kinda picking up on their shit like yall in my speech pattern. not any twangy accent but just you know

i could ramble some more but im wasting time rn i should be productive

someone said that i channeled dave striders spirit in that troll chatlog and im shook

Classic video of Katia Kraft - volcanologist who traveled the world visiting eruptions and eventually was killed in a pyroclastic flow in Japan. This lava flow was at Katla volcano, Iceland. 


Around The World In 80 Days: Chile

Fire Blast
Photo Credit: (Eduardo Minte)
The Towers Among Snow
Photo Credit: (Rodrigo Viveros)
The Beginning… Lago Pehoe
Photo Credit: (Rob Gaunt)

The photographers deserve credit so DO NOT remove credit information. Thanks.


Here is the massive ash cloud tossed up by the large pyroclastic flow at Sinabung Volcano on August 2.


More distant, timelapse view of a pyroclastic flow coming down the slopes of Sinabung.

anonymous asked:

wasnt pompeii destroyed by the pyroclastic flow from the mountain, whereas a neighboring town was destroyed by the molten rock itself? like thats what i remember from history class

no both pompeii and the neighboring town were destroyed by julius caesar when he tried to conquer the volcano


Filming a pyroclastic flow in Japan, 1991. A pyroclastic flow is a fast-moving current of hot gas and rock which reaches speeds moving away from a volcano of up to 700 km/h (450 mph). The gas can reach temperatures of about 1,000 °C (1,830 °F).

Now this is the real horrors of our world. Imagine being caught in that!