Making Artificial Earthquakes with a Four-Tonne Steel Ball | Download MP4, WEBM, MP3 from YOUTUBE.COM

Making Artificial Earthquakes with a Four-Tonne Steel Ball


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Published: 1 week ago
In Göttingen, Germany, there's a four-tonne steel ball that can be raised up a 14-metre tower -- and then dropped in less than two seconds, crashing back to earth. It makes tiny, artificial earthquakes: here's why.

Thanks to all the team at Wiechert'sche Erdbebenwarte Göttingen! You can find out more about them here: https://www.erdbebenwarte.de/

Three things I had to cut out of this video, because they didn't quite fit into the story or because I couldn't film them:

The reason the steel ball survived two world wars is because the university's records listed it by use as a "rock-ball", not by composition as a "steel ball" - so no-one melted it down for weaponry.

The observatory team refill that pit every year to make the ground flat, and the ball just digs a hole again. The rock's just being compressed underneath. They joke that, somewhere in Australia, there's a slowly growing hill...

And finally, the ground steams for a little while after the ball hits: it gets rather warm...

Edited by Michelle Martin (@mrsmmartin)

I'm at http://tomscott.com
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comment  Comments

you're telling me that 22 inch diameter ball is 8800 lbs

2 days ago

guess who else had the nickname "the crazy german"

2 days ago

My physics teacher lives like next door from this....

4 days ago

There seem to be loads of Germans in the comments here. Do any of you know if there is a German equivalent to Tom Scott's Might Not Have Known videos? I'd like to broaden my subscriptions.

4 days ago

Now imagine what it must feel like if the 7100 kg AP projectile from the 800mm railway gun "Schwerer Gustav" impacts the ground next to you. No explosion, just over 1.5 Giga-Joules of pure kinetic energy penetrating the ground up to a depth of 32m.

4 days ago

You mentioned P waves and S waves, but what about L waves?

6 days ago

How did you get it back to the UK 😉😉

6 days ago

IT WAS YOU

6 days ago

Did you set off that earthquake in the Bristol channel earlier, Tom?

6 days ago

I expect a video on జ్ఞా soon enough

6 days ago

Actually thats a WW2 torture device

1 week ago

You used rope to pick it up?

1 week ago

Just recently discoverey your channel and I gotta say, good thing I did. Don't think I ever learned so many interesting things in such a short time, even about my home county (germany). Kudos to you, looking forward to more of your videos.

1 week ago

i live about 10 minutes away from that facility

1 week ago

4 ton ball with what looked like thin rope??? 🤔

1 week ago

That was the license to print money?

1 week ago

You should do a video on surround sound. 5.1, 7.1 etc. What Windows Sonic and Dolby Atmos does and all that.

1 week ago

There is a story here about Benkelman Beam, and Dynaflect, perhaps even Porctor. But those may be for @engineerguy or @practical engineering

1 week ago

IS THAT A JOJO REFERENCE?

1 week ago

How come you didn't show the impact from the third camera view as well? :(

1 week ago

Meters?

It's too bad it's metric tonnes. Lone tons would have been heavier.

1 week ago

Stop tea bagging mother earth.

1 week ago

Congrats on trending!

1 week ago

That ball is dented asf

1 week ago

Innnnnnteresting.....now how do I incorporate this into my life ?

1 week ago

My gf makes artificial earthquakes.
She’s huge.

1 week ago

The "I told you so" at the end has me dying xD

1 week ago

Why are you damaging the Earth on purpose?

1 week ago

that ball looks like that match ball made out of like 43,000 matches that All is Art set on fire.

1 week ago

Kewl

1 week ago

after all that waiting you didn't even get any good footage of the thing falling and hitting the ground.

1 week ago

Look into HAARP, they can make news worthy earthquakes and hurricanes, we’ve had that technology for a long time now.

1 week ago

Check out the flat earth theory

1 week ago

Dnc

1 week ago

Hi

1 week ago

This reminds me of when my balls dropped.

1 week ago

a good representation of my balls dropping.

1 week ago

Really rude to drop Amy Schumer just for a science experience.

1 week ago

Why didn’t you show the ball drop from the camera angle that had you in view??? 🤔

1 week ago

It certainly beats the New Year’s ball drop, I've never actually watched the whole thing, but of what I’ve heard it doesn’t sound terribly interesting. I would like to have seen more angles and results of the drop though, that would’ve made it all worthwhile.

1 week ago

drop it on your head

1 week ago

No

1 week ago

Good !

1 week ago

Now Imagine 4000 tons.

1 week ago

Ja

1 week ago

完全没明白😳

1 week ago

*ton

1 week ago

You've consistently trended each week with each video. Congrats. I've loved this channel for years. Found it via Computerphile.

1 week ago

Too bad it doesn't cause a real earthquake.

1 week ago

Really dropped the ball on that camera placement

1 week ago