Two Krakatoas: Ring of Fire - tectonic journeys in E Asia

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No journey around E Asia's "Ring of Fire" would be complete without a stop at Krakatoa - its devastating eruption in 1883 is one of the most famous in history. Find out what we know about the eruption and its associated tsunamis, how we know it and what remains a puzzle, then compare it with the eruption and tsunami from 2018. It's not entirely a disaster movie as there is hope for mitigation measures at least against moderate volcanogenic tsunamis. This is part of a series of films that accompany the fourth season of the BBC's "Race Across the World". #tectonics #geology #ratw #krakatoa #anakkrakatau #indonesia #volcano #tsunamis

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26 май 2024

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Комментарии : 20

@amacuro Месяц назад

1:22 I think every Geology course that introduces normal (and reverse) faults to students, should show this bit here. I was taught this in a very abstract way, which made it difficult for me to grasp 100%. I was told of "forces" separating two blocks in opposite directions. Which is fine, but seeing this video putting it into context, and understanding the source of these forces (colliding oceanic and continental plates in this case), and then use this same map to show a cross section to show a post-collision snapshot where you can clearly see the faults and direction of movements is very illustrating. It was a beautiful moment, thank you.

@robbutler2095 Месяц назад

Thanks - glad it was useful. There are a bunch of other tectonic videos on the channel that could be useful too.

@VentureNW Месяц назад

Great info here - thank you. I feel Krakatoa is one of the reasons, that they are moving Jakarta over to Borneo (outside of the fact, that the city is sinking). Otherwise, I would think it would be easier just to migrate the city further inland.

@robbutler2095 Месяц назад

As you note, one of the greatest risks to Jakarta is excess groundwater extraction... hence the subsidence....

@ignatiusryd2031 Месяц назад

As an Indonesian i can told you that during colonial era Dutch East Indies already "that close" to completing their plan to move the capitol center to Bandung. The most beautiful city in colonial Southeast Asia at that time. Located on a highland with a very suitable climate for most European officials at that time, surrounded by mountains, hot springs, and fertile agricultural areas at the heart of West Java province. Had that plan completed then it would become an ultimate nightmare for the govt's after the Dutch East Indies. Not only because the city itself are founded right on top of the piles of fertile sediments from the former ancient lake, its also surrounded with at least 5 active volcanoes before later on its also discovered that the city itself sat on a very close proximity less than 20 kilometer away from an active tectonic fault called as Lembang Tectonic Fault.

@thenextpoetician6328 Месяц назад

Good work. Couple of points - it's been shown that solar activity is a significant cause of tectonic and volcanic activity. Look up Toba. Now that was a monster. It's suggested the passage of Sholz's Star might have set it off, as well as spawning the nonsense about Nibiru.

@HONGKELDONGKEL1888 Месяц назад

if i think of famous volcanoes, Krakatau/Anak Krakatau certainly is on the list, along with Lawetlatla (St Helens), Tambora, Sakurajima, Fuji, Vesuvius, Taal, Mayon, and more. but the Indonesian volcanoes? man, they're something else.

@just_kos99 Месяц назад

When I think of a famous volcano, Mt St Helens is the first to come to mind 'cause I heard it blow that morning on May 18, 1980 and my name is Helen S, lol.

@robbutler2095 Месяц назад

No accounting for personal experience! Must have been wild in 1980.

@JohnEricsson-ub8pz Месяц назад

It erupted on my 15th birthday

@Catherine_44 Месяц назад

Isn't the ring of fire only for the area on the Pacific plate? While western to central Indonesia (Krakatau, Merapi, Tambora) is on the Indo Australian plate and the Sunda/Eurasian plate.

@robbutler2095 Месяц назад

Ring of Fire is an informal term - and many people (BBC included) ave the Indonesia archipelago as well as the circum-Pacific parts. ...

@Zantigableiaust Месяц назад

Moreover, what if we could harness the abundant raw power it produces? I feel like a crazy genius scientist in a movie.. Considering Indonesia has many volcanoes, if we could do this, it would be amazing.. My condolences to the victims, it was incredibly tragic.. I watched a video of a band performing in West Java when they were suddenly hit by the tsunami.. Three or four of its members and many others were killed or went missing..

@robbutler2095 Месяц назад

Yes indeed - the tsunami hit a gig where the band Seventeen were playing. Several of the band members and many in the audience were killed. Terrible, But you're right - Indonesia has great potential for geothermal energy - like Iceland.

@clarenceghammjr1326 Месяц назад

I thought of Tambora first, then tobo, then taal

@EatRice-no8hi Месяц назад

Ngeri kan bang?

@robbutler2095 Месяц назад

I'm sure it was (both times) but there is a hopeful ending....

@geri8666 Месяц назад

Which is.......?

@geri8666 Месяц назад

There is a puzzling controversy over which volcano caused the epic catastrophe of 536 A.D. that ended the ancient world. Some say it was El Salvador's ilopango while others say it was Krakatau. There were 2 eruptions in that era, so maybe it was both. Investigators from China traveled to the Indonesian location soon after the eruption of Krakatau and discovered the geology had been altered: the island of Java had been blasted into 2 parts that created the Island of Sumatra that we know today along with the Sunda Strait that divides the two. I wonder if anybody has studied the ragged coasts of both islands to determine if the report is accurate.

@robbutler2095 Месяц назад

@@geri8666 My understanding is that the Sunda Strait (Krakatoa) has been ruled out for the 536 AD "volcanic winters". No obvious candidates in SE Asia. Potentially in NW Pacific area....