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rouneezie t1_j77jzns wrote

Fun fact: Molokai's north cliffs are so tall because... they once were connected to an entire other half of the island that just sheared off from a massive earthquake and the resulting landslide. If you take a look at Google maps in the satellite imagery mode just north of the island, you can see the debris of the parts of land that slipped away into the depths.

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kw661 t1_j78gocg wrote

We get landslides every time it rains to one degree or another. Lava is very crumbly.

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rouneezie t1_j78pnw5 wrote

What boggles my mind is that the Nu’uanu slide, when it took out half of the Ko'olau range, is suspected of having created the largest tsunami wave ever at 100m+ in height!

With great tropical beauty comes great geologic risk, I guess.

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SaltAd2986 t1_j794ewl wrote

actually, although 100m+is very tall. this tsunami in AK was estimated at 1,720' or 520m...wow

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https://www.alaskasnewssource.com/2022/09/01/fault-facts-worlds-largest-tsunami-was-our-backyard/#:~:text=Alaska%20is%20home%20to%20the%20largest%20tsunami%20ever%20recorded.&text=ANCHORAGE%2C%20Alaska%20(KTUU)%20%2D,who%20died%2C%20and%20four%20survived.

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badgerandaccessories t1_j7cwspu wrote

That doesn’t really count since the wave only went 600 feet to the other side of a bay. The wave wasn’t 1720 feet tall, just that’s how far water splashed up the mountain on the other side.

In your link they even say a small boat survived by letting out enough anchor line and being able to ride the wave. No chance they did anything over a 150 foot wave like that.

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Chipotle42 OP t1_j77k9e9 wrote

Quite amazing, and makes me wonder about Kilauea doing same😱

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rouneezie t1_j77n8l4 wrote

Definitely going to happen someday - it's a question of when not if. The nature of the islands' porous volcanic rock makes them susceptible to this phenomenon.

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NormalAccounts t1_j79aobq wrote

Half of Oahu did this too. The whole west east side of the island collapsed overnight thousands of years ago. Can see debris halfway to North America

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taikin13 t1_j78ridy wrote

That’s going to be a hell of a tsunami.

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djinner_13 t1_j79orhi wrote

Is there any tradition of throwing dead bodies off the cliffs?

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HiitlerDicks t1_j79n9ly wrote

I can see why the ultra wealthy are choosing this as their stronghold location for the upcoming collapse

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