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I take this hammer to simulates an earthquake
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Secrets of the Underground

I take this hammerto simulates an earthquake, the earth's crustis represented by plywood,...

I take this hammer
to simulates an earthquake, the earth's crust
is represented by plywood, and the topsoil is represented
by this thin sheet of sand

Full Transcript

00:00:01.000 --> 00:00:03.004
I take this hammer to simulates an earthquake,
00:00:03.012 --> 00:00:06.006
the earth's crust is represented by plywood,
00:00:06.068 --> 00:00:12.008
and the topsoil is represented by this thin sheet of sand.
Duration
13 seconds
Views
17
Timestamp in Movie
00:32:21
Uploaded
Jul 09, 2025
Season
1
Episode
1
Genres
documentary

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Movie Summary

Using cutting-edge technologies such as ground penetrating radar (GPR), LIDAR (Light Detection and Ranging), and 3-D imaging, scientists research fascinating underworlds of secret tunnel networks, ancient structures, and bizarre g...
S01 • E08 All right, looks like we're in a good place, so we're gonna go down. - Secrets of the Underground 00:05
All right, looks like we're in a good place, so we'...
S01 • E07 Is really a petroglyph, But if it is, what does it mean? - Secrets of the Underground 00:05
Is really a petroglyph, But if it is, what does it mean?
S01 • E03 Could an underground cavern also exist beneath Mountain Lake, - Secrets of the Underground 00:08
Could an underground cavern also exist beneath Mountain Lake...
S01 • E02 All right, we're all done. I'm gonna break down the transit now. - Secrets of the Underground 00:04
All right, we're all done. I'm gonna break down th...
S01 • E01 So let's see how likely it is that these mounds formed this way. - Secrets of the Underground 00:05
So let's see how likely it is that these mounds formed ...
S01 • E02 Now we can start our search for any anomalies inside the mound. - Secrets of the Underground 00:05
Now we can start our search for any anomalies inside the mou...
S01 • E03 I'm hoping the ROV can help answer that question. - Secrets of the Underground 00:04
I'm hoping the ROV can help answer that question.
S01 • E02 We're not allowed to physically dig up the site, - Secrets of the Underground 00:06
We're not allowed to physically dig up the site,
S01 • E03 Look at all the silt flowing past you. Wow. - Secrets of the Underground 00:04
Look at all the silt flowing past you. Wow.
S01 • E07 With what could be seen in early Irish christian manuscripts, - Secrets of the Underground 00:10
With what could be seen in early Irish christian manuscripts...
S01 • E03 But as is gets closer to the possible source of the leak, - Secrets of the Underground 00:06
But as is gets closer to the possible source of the leak,
S01 • E02 Now, state-of-the-art scanning technology - Secrets of the Underground 00:07
Now, state-of-the-art scanning technology
S01 • E01 Each hammer hit is meant to represent a seismic event. - Secrets of the Underground 00:04
Each hammer hit is meant to represent a seismic event.
S01 • E01 It's making the board shake - Secrets of the Underground 00:07
It's making the board shake
S01 • E07 These are ogom Or ogham letters. - Secrets of the Underground 00:05
These are ogom Or ogham letters.
S01 • E02 This is the GPR unit, ground penetrating radar. - Secrets of the Underground 00:05
This is the GPR unit, ground penetrating radar.
S01 • E08 The ROV gives me a much closer look at the site than the radar scans. - Secrets of the Underground 00:06
The ROV gives me a much closer look at the site than the rad...
S01 • E03 I can just wiggle a little bit, but I can't get out. - Secrets of the Underground 00:04
I can just wiggle a little bit, but I can't get out.
S01 • E07 Because it's easy To chisel into wood, - Secrets of the Underground 00:06
Because it's easy To chisel into wood,
S01 • E03 Let me give a tug on the umbilical and see if we can get you free. - Secrets of the Underground 00:05
Let me give a tug on the umbilical and see if we can get you...