Marapi Volcano Update; A Lethal & Destructive Lahar was Generated

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For the 2nd time in 6.5 months, a lethal disaster sadly occurred at the erupting Mount Marapi volcano. This occurred due to heavy rainfall, which washed quickly away downslope to the prior incineration of a patch of ground due to Marapi's December 3rd eruption. As a result, a lahar with an estimated height of 30 feet was generated which damaged dozens of structures. This video explains why this lahar was generated, and the danger that so-called "secondary lahars" can generate.
Thumbnail Photo Credit: Cropped image taken from Explore West Sumatra's video, • GUNUNG MARAPI SUMATRA ... . Used with Permission.
Please subscribe to Explore West Sumatra, who granted me permission to use their drone footage in this video!
Channel link: / @explorewestsumatra
Source footage video links:
[1] • GUNUNG MARAPI SUMATRA ...
[2] • BANJIR BANDANG (GALODO...
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This video is protected under "fair use". If you see an image and/or video which is your own in this video, and/or think my discussion of a scientific paper (and/or discussion/mentioning of the data/information within a scientific paper) does not fall under the fair use doctrine, and wish for it to be censored or removed, contact me by email at geologyhubyt@gmail.com and I will make the necessary changes.
Various licenses used in sections of this video (not the entire video, this video as a whole does not completely fall under one of these licenses) and/or in this video's thumbnail image (and this list does not include every license used in this video and/or thumbnail image):
Public Domain: creativecommons.org/publicdom...
CC BY 4.0: creativecommons.org/licenses/...
Sources/Citations:
[1] PVMBG
[2] Brown, S.K., Jenkins, S.F., Sparks, R.S.J. et al. Volcanic fatalities database: analysis of volcanic threat with distance and victim classification. J Appl. Volcanol. 6, 15 (2017). doi.org/10.1186/s13617-017-00..., CC BY 4.0.
[3] VEIs, dates/years, composition, tephra layer name, DRE estimates, and bulk tephra volume estimates for volcanic eruptions shown in this video which were assigned a VEI 4 or larger are sourced from the LaMEVE database (British Geological Survey © UKRI), www2.bgs.ac.uk/vogripa/view/c..., Used with Permission
[4] Source of Volcanic Explosivity Index (VEI) methodology and criteria: Newhall, C. G., and Self, S. (1982), The volcanic explosivity index (VEI) an estimate of explosive magnitude for historical volcanism, J. Geophys. Res., 87(C2), 1231-1238, doi:10.1029/JC087iC02p01231. Accessed / Read by / geologyhub on Oct 5th, 2022.
0:00 A Destructive Lahar
0:47 Heavy Rainfall
3:23 Eruption Size
4:03 Secondary Lahars

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27 май 2024

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Комментарии : 108

@GeologyHub 14 дней назад

Be sure to check out the Explore West Sumatra channel, who granted me permission to use their drone footage in this video! Channel link: www.youtube.com/@ExploreWestSumatra

@AaronGeo 15 дней назад

Lahars are genuinely terrifying. Imagine drowning in a giant flood of volcanic mud and sludge

@Benson_aka_devils_advocate_88 15 дней назад

A person would probably die of blunt force trauma from all the rocks and boulders in the lahar before they'd drown in it.

@kaoskronostyche9939 15 дней назад

I agree with the blunt force trauma idea. Same in Tsunamis. More people are killed by floating debris than by drowning. Cheers!

@AaronGeo 15 дней назад

@@Benson_aka_devils_advocate_88 Yeah, like pyroclastic flows

@bholdr----0 15 дней назад

I was too young to remember the lahars on Mt St. Helens (I was born in '79, and lived about 40 miles north of it.), but, having seen bothe the footage and the results and having head firsthand stories from oeoole that remember (obviously not peiple in the path of them)... I literally cannot imagine anything more horrific to be trapped in. So sorry for those victims of this astounding and thankfully rare natural disaster.

@blackbette07 15 дней назад

I remember the one in Columbia in 1985. The most haunting part was the girl who passed because she trapped in debris and rescuers didn't have the means to get her out

@baystated 15 дней назад

I read some news articles calling it a "cold lava" and made no use of the word lahar. Missed opportunity to teach their readers a new vocabulary word.

@thrumbo 15 дней назад

in my country its the opposite, they call lava hot lahar and lahar cold lahar.

@anwalborn 14 дней назад

From this disaster because of that reporting I learned the origin of the word lahar. The word comes from an Indonesian language (Javanese) and means lava or mudflow. When they report on lahars in Indonesian they usually write it as lahar dingin, which literally translates to cold lava. Even if you put it in google translate. So when the news gets translated to English from the original Indonesian reports in their local languages is why the word lahar disappears and instead we see cold lava used instead. A cool little fun fact to learn

@tomcat9269 8 дней назад

ꦮ꧀ꦭꦲꦂ

@catherinehubbard1167 15 дней назад

Your stunning statement at the end of this important video needs to be widely repeated: Between 1500 and 2017, lahars accounted for 26% of all volcano-related deaths. I had no idea. Shocking too was your description of how earlier volcanic eruptions leaving behind ash can set up much later sudden killer lahars. Tragic that the lahar early warning system wasn’t completed in time for this terrible event.

@bouteilledeau1463 15 дней назад

Mt Pinatubo is also famous for this. In 1995, during a typhoon, the town of Bacolor was buried in lahars made from ash deposited 4 years earlier.

@GeologyHub 14 дней назад

Lahars are often a huge killer at various volcanoes. And why if Mt. Rainier was to erupt why I’d be rightfully panicking.

@catherinehubbard1167 14 дней назад

@@GeologyHub : have you made a previous video on the danger of of lahars from a future Mt Ranier eruption?

@soranuareane 15 дней назад

You need 10x as many subscribers as you have. This is my go-to place for world volcanism news.

@elizabethroberts6215 14 дней назад

……read daily ‘volcanodiscovery’………

@Vesuviusisking 15 дней назад

Rip to everyone who passed away

@logan3455 15 дней назад

In New Zealand we are taught about the Tangiwai disaster. Lahars are no joke.

@bradybowe4886 15 дней назад

I watch your videos every day to be updated on what is going on with the volcanoes of our world.

@ThatOpalGuy 15 дней назад

very sad/ my condolences to those affected

@petuniasevan 15 дней назад

4:36 I still remember the news of the Armero tragedy. 23,000 people died because they weren't warned/evacuated.

@luannvondracek439 14 дней назад

Sympathy to those who have lost relatives in this tragedy. I heard about this this AM and was waiting for this explanation. Again you've brought the human element into science. Thanks.

@matthewbooth9265 15 дней назад

Am I right to be annoyed by the Daily mail referring to this as being a cold lava sweeping a village? It seems to be such a weird way to describe it....whats next from them, hot snow causes floods?

@patpierce4854 14 дней назад

Annoyed - sounds about right. Yes, it was not hot lava flowing, but rainwater and volcanic ash. Perhaps the person describing this, had little understanding of specifics like laharrs or pyroplastic flows, and just described the occurrence as best understood.

@cheekbonesin4532 14 дней назад

It's probably a direct translation from lahar (lava) dingin (cold) which the term we use in Indonesia. Lahar dingin is what we call it.

@infinidominion 14 дней назад

Most viewers are low brow as hell and that terminology caters to them

@deborahferguson1163 15 дней назад

Thank you for covering this GH. Sad consequences.

@zacharybenson6195 15 дней назад

It's quite heartbreaking the timing and the deaths. The videos are nightmare fuel, given how this death-sludge flooded the town at night.

@TheSpaceEnthusiast-vl6wx 14 дней назад

Oh no... Thanks as always. RIP to those who passed away.

@xwiick 15 дней назад

Thanks for all of your hard work man!

@user-pi4wj7bm4z 15 дней назад

Thanks for the continued updates and explanations. Greg.😊

@kw3593 15 дней назад

Greatly appreciate your covering this ❤

@Shoshana-xh6hc 15 дней назад

Thank you for the fantastic images. 🌋🧡

@kaoskronostyche9939 15 дней назад

Thank you for the update.

@theark1400 15 дней назад

50mph is absolutely horrifying

@susiesue3141 14 дней назад

Thank you for your video. So informative! There is a lot of scary stuff going on in the world. 😮

@RedRoseSeptember22 15 дней назад

RIP to all who were lost :(

@AizenV7 14 дней назад

note: not to be confused with Mount Merapi in Central Java.

@scillyautomatic 15 дней назад

very sad.

@vrccim5930 14 дней назад

Thank you.

@Flame-Bright-Cheer 14 дней назад

My main magma man just wanted to let you know how much I appreciate your consistently consistent videos in my opinion you constantly keep it consistent and that consistently makes me want to constantly hit the like button. LOVE you for this BRO man 🤘🏼🤓🤘🏼

@pon2oon 14 дней назад

Thanks!

@GRANDMASTER3D 15 дней назад

Why is this a lahar and not a mudslide of volcanic material? Where is the line? What's the technical difference? Thank you?

@OpaSpielt 15 дней назад

I think it's just a naming convention. A mudslide of volcanic ashes is called a lahar. And besides, it's shorter to call it a "lahar" than calling it a "mudslide of volcanic ashes" It's similar to "falling water droplets," which are called "rain" 👋🏻👴🏼

@EatsLikeADuck 15 дней назад

Definition: A lahar is a hot or cold mixture of water and rock fragments that flow quickly down the slopes of a volcano. A lahar is a landslide but not all landslides are lahars. The key is the slide occurring on a volcano.

@adiabd1 14 дней назад

My guess is that volcanic mudslide sounds like volcanic materials that went down the volcano like an avalanche, while lahar is like flash flood but contains volcanic materials

@irishpsalteri 14 дней назад

Not a well-educated man on this topic, but much more so since discovering this channel.

@venturefanatic9262 15 дней назад

I made sure my house was well above any Lahar prone areas aside one from a complete collapse of Mt Rainier.

@ryankingston6119 14 дней назад

Sad situation

@puravidadew7031 14 дней назад

You would think the people who live in such an area would be well aware of the possibility of this happening. They already knew there was a pyroclastic flow, And when it started raining that heavily they should have known that there was going to be a very big problem very soon.

@manyhammers5944 15 дней назад

Weather Channel called it "cold lava". I hate those sensational liars. Lahar lahar lahar! Teach people by using the proper nomenclature.

@tomcat9269 8 дней назад

ꦮ꧀ꦭꦲꦂ ꦮ꧀ꦭꦲꦂ ꦮ꧀ꦭꦲꦂ !

@ikbalikbal769 14 дней назад

And now the death toll has increased to 44 people.😢

@tracykruzan5939 14 дней назад

I was in an eruption from Mount St. Helens when I was 18. Horrifying!

@squidduck 15 дней назад

Are you Canadian? I ask because of the North American accent, but the use of Decimeters…….

@tcp3059 15 дней назад

He lives in Arizona, just uses metric units for science reasons.

@kw3593 15 дней назад

Much as we would love to claim him as Cdn I am pretty sure he is in the US. Science tends to be in metric

@OpaSpielt 15 дней назад

It's makes sense to use metric units here and in science: ● Scientists of all over the world use metric units. ● The viewers of his videos come from all over the world, too. ● Generally, it's much easier to compute metric units. One kilometer equals 1000 meters. One meter equals 100 centimeters. So, one kilometer equals 100,000 centimeters. If you try a similar computation with miles, feet, and inches (like one mile equals how many inches), it's much more difficult. 👋🏻👴🏼

@jamesengland7461 15 дней назад

The use of decimeters is unusual. I don't know why it's not more widely used. Y'all seem to be missing that point.

@evovulpes122 15 дней назад

I haven't heard anyone using decimeters for a long time. I bet some people don't even know what it is. lol.

@robmcelwee389 15 дней назад

Have you ever talked about the lahars that killed the redwoods at Floresant Colorado?

@afl6786 15 дней назад

Many people(non science enthusiast)actually blame bmkg(weather and eartquake agentcy) isntead of PVMBG(volcano agency) Even though bmkg only give bad weather warninh

@sekar9901 12 дней назад

Kecuali merapi (jawa tengah), pemerintah daerah lainnya kurang aware sama ancaman lahar dingin. Apalagi kalau habis erupsi, hampir pasti bakal ada lahar dingin jadi kalau hujan dimonitor banget. Di merapi Jateng, setau saya ada volunteer, sirine, bahkan radio komunitas. Jadi kalau ada lahar dingin udah pada diperingatkan. Mungkin karena merapi udah terlalu sering erupsi jadi warga lokalnya udah terlatih. Dulu semeru juga makan korban, sekarang marapi sumatra.

@afl6786 12 дней назад

@@sekar9901 iya,di gunung yg sering erupsi dan banjir udh bagus sistem peringatan dini ny

@rogerc7960 15 дней назад

Extra footage m.ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-elZycIxYrmk.html

@Heavenlyrules 14 дней назад

Yeah

@swainscheps 14 дней назад

How many barleycorns in a decimeter?

@amaranthlim3175 14 дней назад

Did you know, There is a cafe name Cafe Xakapa which is been built on riverbank and destroyed by lahar.

@ihsan1397 13 дней назад

why is Officer categorized as VEI 2? although it has reached the lowest limit of VEI 3

@LemonLadyRecords 15 дней назад

So the agency who gave the warning didn't know that the new system was not finished yet?? Something is not right. If this reporting is true, hopefully there's some accountability somehow, because if they had used the old methods, like, uh, the MEDIA (the new system seems to rely on phones...so... ) There was almost an hour to do the previous warning methods! How tragic. RIP all victims and sympathy to their families for their seemingly uneccesary deaths. More should have been done after last year, or the other times. 💔

@danlast4726 14 дней назад

Question @GeologyHub : Can magma be superheated and if so what happens when it is?

@infinidominion 14 дней назад

Is it not hot enough?

@danlast4726 13 дней назад

@@infinidominion I'm absolutely sure it is. All the same I wondered, if magma can be supercooled, can it be superheated and if so, at what temperature, and does the magma change state?

@AngryManSki 15 дней назад

18 BBW’s died 😢😢

@ralbiruni 14 дней назад

😩!

@billcarruth8122 15 дней назад

I don't know if classifying the storm as "unusually" heavy rainfall is fair. It is a rainforest.

@LemonLadyRecords 15 дней назад

5" rain in 3hrs isn't unusual where I live in the US (I think we're getting it now!), and we're not in a rain forest and don't have a monsoon to compare it to, although it's out of monsoon season there atm.

@mysickfix 15 дней назад

Why do all your videos have an “Altered or Synthetic Content” warning? I can’t seem to find any reason.

@kerriadereth 15 дней назад

Honesty in the use of 3D generated images, I imagine.

@MaidenFair 15 дней назад

I was just wondering the same thing. First time I’ve personally seen that and I even went to check the link to get some elaboration since It was so unusual to see on this channel. There was no explanation given upon viewing the given QR code.. Maybe it’s some automated thing from RU-vids algorithm bc he isn’t following the news cycle’s version of “cold lava bs”

@mysickfix 14 дней назад

@@MaidenFair yea I just noticed them too, and I’ve been watching this channel for a while. It’s very informative so know why RU-vid is saying this would be nice lol.

@lindaderoos5240 14 дней назад

Merapi

@keesvrins8410 14 дней назад

You dont need a lahar warming system if its raining 13 cm in 3 hours. Then you should warn already.

@milosdjokicbg 14 дней назад

as I know Merapi is on Java, not Sumatra

@historiapoliticabellum6265 10 дней назад

Mount Merapi is indeed located in Java, but Mt.Marapi is on Sumatra Island. Both of these mountain have near identical name, only one letter that differentiate between them.

@Craby-yw9eq 15 дней назад

Ohh a hard rain is gonna fall.Bob Dylan song.

@Craby-yw9eq 15 дней назад

A hard rain is gonna fall. Bob Dylan song.

@jakeaurod 15 дней назад

Those casualty silhouettes look like armed soldiers.

@Craby-yw9eq 15 дней назад

That's going to cool things down! 😅 Maybe it's because people can't control the weather and the solar flares and the whole world 🌎. Look! He's making all things new!!!!!!.