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Mar 15, 2025: Sirens Sound! Lahar/Flash Flood Descend from Semeru Volcano in Indonesia
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- Published on Jun 21, 2025
- Welcome to Semeru CAM B, our 24/7 live stream capturing the majestic Mount Semeru-Indonesia's highest and one of its most active volcanoes. This camera is strategically positioned to monitor the pathways of frequent pyroclastic flows and lahars, which pose significant risks to nearby communities.
Local gravel miners work daily in this creek bed, mining valuable black gravel for nearby industries. However, their work is fraught with danger, as sudden flash floods can catch workers off guard and put them in harm's way.
This live stream serves as a vital tool for residents and the Regional Disaster Management Agency (BPBD) to monitor changes in weather, volcanic activity, and water flow, aiding in disaster forecasting and enhancing community safety. You can help! If you notice a strong surge in water flow along the creek bed or the presence of waterfalls from a heavy rain, please post the timestamp in the chat and our team of moderators will take it from there.
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Where is this camera?
The camera is situated about 11km southeast of the Semeru volcano and about 3km to the east of Cam A. The view is looking northwest. The sound is live from the camera source. You can also view other views of Semeru from our other 4K cameras:
View from the north side: ruclips.net/user/li...
View from 8km away from the Volcano (Cam A): ruclips.net/user/li...
View from 11km away from the Volcano (Cam B): ruclips.net/user/li...
Did you know?: Semeru's "Cam A" was the world's first 24/7 4K camera pointed at an erupting volcano!
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About Semeru Volcano
🌋 Location: East Java, Indonesia
🌋 Elevation: 3,676 meters (12,060 feet)
🌋 Type: Stratovolcano
🌋 Activity: Known for frequent eruptions and ongoing lava flows
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What You'll See on This Live Stream:
Eruptions: Watch as Semeru erupts with towering ash plumes, pyroclastic flows, and glowing lava at night.
Panoramic Views: Enjoy breathtaking vistas of the volcanic peak and surrounding landscape, including the lush forests of East Java.
Nighttime Drama: After dark, witness the fiery glow of lava flows and incandescent explosions, lighting up the night sky.
Locals loading black gravel by hand into trucks - a form of small-scale mining. In Indonesia, this is a common livelihood for locals, especially in volcanic regions.
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Volcanic Materials as a Resource
When Mount Semeru erupts, it produces large amounts of volcanic ash, sand, and gravel. These materials are deposited in the riverbeds and surrounding areas. Over time, they become valuable resources for construction, used in making concrete, bricks, and other building materials.
In this livestream, you'll see locals loading black gravel by hand into trucks - a form of small-scale mining. In Indonesia, this is a common livelihood for locals, especially in volcanic regions.
Trucks then transport the gravel to processing sites or directly to construction companies.
This activity provides a vital source of income for many communities in the region. Gravel and sand mining are in high demand due to the booming construction industry in Indonesia.
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Fascinating Facts about Semeru Volcano:
The Great Mountain: Known as Mahameru, which means “The Great Mountain,” it’s revered in Indonesian mythology and culture.
Constant Activity: Semeru has been in a near-constant state of eruption since 1967, with explosive outbursts of ash and pyroclastic flows.
Climbing Destination: Despite its dangers, Semeru is a popular climbing destination, attracting adventurers and nature lovers from around the world.
Lush Ecosystem: The surrounding region is known for its rich biodiversity, from forests to fertile farmlands, thriving in the volcanic soil.
Legendary Eruptions: Semeru’s activity is notorious for sending ash plumes high into the atmosphere, occasionally disrupting air travel and affecting nearby communities.
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Note: This is a live stream of an active volcano. Viewer discretion is advised due to the potential for sudden and dramatic volcanic activity.
This reminds me of the 2008 and 2010 Merapi eruptions, when I was still a university student in Yogyakarta. My campus stood at the foot of Mount Merapi, and my home wasn’t far from there.
In 2008, we only needed to evacuate locally. There were no casualties, as the eruption was relatively minor. But in 2010, everything changed-my girlfriend, her family, and I had to flee all the way to Surabaya. The eruption’s impact was catastrophic: Merapi hurled volcanic rocks the size of three-story buildings as far as 25 kilometers
Ive been in an Icelandic valley carved out by a huge flash flood. I couldnt even beginto imagine the force and sound. This has helped me undertand it a bit.
Skip to 11 minutes 33 if your here to see water 💧 😀
TY
That is molten lava. These flows typically occur due to rainfall on the mountain's slopes or summit
Good to know they have an alarm system.👌
They don’t bother listening to it.
Of course they do! They are probably used to this happening after it has rained and know how much time they have to evacuate the area after the alarm has gone off.
@@lhs761 ...that's Bob, he used to sing soprano, now he's the official alarm!!
Following the 2006 Yogyakarta earthquake, Indonesia enhanced its natural disaster management systems-a similar improvement also occurred after the 2004 Aceh tsunami.
The force of nature, watching those boulders tumble around, wow
Why is the rock excavator still working and not leaving the area? Thanks Guys for answering 😊
i dunno
Probably used it to deepen the stream bed in order to contain the flow. Those rig operators often become first responders during emergencies. Heroes.
They were the managers of the Flow
3!!
@@ArtU4All...request denied!😊
Man v nature. Nature always wins.
Well this is something different. Very interesting. I hope everyone is safe and out of harms way.
"And here we see a family of excavators, making sure the floodwaters avoid their home"
Did all the workers make it out?
I'm glad to see protection systems in place!
Terrifying!!!Thankyou-AfarTV
Nyimak kawan sanga mengerikan melihat vidiomu 🎉👍👍
The guy in the digger just keeps on going
@sheilahperry-rosales8748 Yes that just his moronic self not processing the severity of the problem . 🤦♂️🤷♂️
Those are brave men 💪.
I…rainé ❤😂 Goddess Ainé 😮 pretty!
Lahars are scary as hell . So deadly!
That ominous sound...
It’s a flash flood along an already eroded wadi. A Laha is caused by volcanic sludge washing out of lakes or rivers dammed by volcanic ash.
Thats Terrifying..
How it's only a little bit of water geez.
@@jase4270 "A little bit of water"
Loaded with volcanic debris and anything else it can move. It was only a pretty modest one for Semeru, which over the course of its history will have generated much bigger events than this.
To see all the known laws of physics working both with each other and against each other watch the flow at the last third of this vid, Chaos theory rules. Of course the whole view of the camera is a massive flow from the past. So there is little resistance available to control the flows. This is probably waters from a tropical storm on the volcano shifting loose materials all the way down.
very big boulder, throwing it around like its nothing
What part of flooding do these equipment operators not understand?
Apparently not everyone has an instinct for self-preservation. Flash floods and especially lahar are killers.
Holy Moly 😧
The camera operator was not interested in the safety of the men operating the excavation equipment…let’s watch the muddy water over here, not where the men are….sheesh!
What is the Excavator doing 🤔?
Cari pasir, buat makan anak isteri
You're not going to win this one...run away!!😮
What happened to the excavators
Blocking with rocks, so that the sand is eroded to be sold as a resource.
Time to build a reservoir !💙🩵
Where did the water come from?
@@elizekohler6199 lava of mount Semeru
It is rainwater mixed with volcanic soil from Mount Semeru, commonly called cold lava.
Goodness, thankfully everyone seems to have got to safety
Yes please good Good 👍
Where is all the water coming from?
Good question.
'Rain' may be..
Rain fall mixed with ashes coming down from the steep slopes of constantly erupting volcano gunung Semeru.
It is called a "Lahar" which approximately means "mud flow".
You can search for Nevado del Ruiz eruption in 1985 and you will understand how devastating this volcanic phenomenon is.
@@sugarspeeps9471 The water comes from rain. It is the rainy season in Indonesia now.
heavy rain from the top of the Semeru Volcano, we're here still in rainy season by the way
is there something wrong with the person in the digger?
driving round and round doing random things with the same rock .?
The wail tone lives up to its name and sounds like a lady wailing
I have seen crazy people but this people operate like this is not normal
🌊🚨
15:40 😮
Flash Flood?, i can pee more than what flowed down there!. I was hoping to see the clowns playing with those machines get washed away!!!
I'll never understand what those big machines were doing.
If you say so…I know though…❤️😂❤️😂💧
Seems those excavators are fighting a losing battle.
Wow
Where is that volcano located?
East Java, Indonesia
🚨🌋🚨
To be honest, i expected way more nature violence. Here, the mudslide follows an already carved out riverbed.
Guy on the bull horn making warning sounds!
Lahar floods = free sand
Chriskent helio love you
Can someone please explain what these digger drivers are trying to do??
I hope they have their safety slippers on!
More like safety flip flops.
10:15(apakah itu Saitama)
Spaventoso la potenza dell'acqua, sposta massi di alcune tonnellate come fossero di polistirolo
yuk siaran lagi yuk
Cold lava flood accompanied by earthquake
First
AI strikes again!
What a waste of time after the first half
Cultists?
That was boring
Ý bạn là gì🙄👎🏻
L😂L
This is very boring for a lot of people, read the comments.