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The largest volcano on earth, Hawaii's mauna loa
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Secrets of the Underground

The largest volcano on earth,Hawaii's mauna loa, Is prone to cycles of swellingAnd...

The largest volcano on earth,
Hawaii's mauna loa, Is prone to cycles of swelling
And receding ground levels

Full Transcript

00:00:01.000 --> 00:00:04.639
The largest volcano on earth, Hawaii's mauna loa,
00:00:04.064 --> 00:00:08.509
Is prone to cycles of swelling And receding ground levels.
Duration
9 seconds
Views
20
Timestamp in Movie
00:18:47
Uploaded
Jul 13, 2025
Season
1
Episode
7
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 So, this is Alcatraz as it is today. - Secrets of the Underground 00:04
So, this is Alcatraz as it is today.
S01 • E01 We have to figure out what's below this. Mh-hm. - Secrets of the Underground 00:05
We have to figure out what's below this. Mh-hm.
S01 • E02 If I was testing a wall in a building, - Secrets of the Underground 00:05
If I was testing a wall in a building,
S01 • E08 Peter has been using old surveying data - Secrets of the Underground 00:07
Peter has been using old surveying data
S01 • E03 You suddenly get sick, so why not blame it, basically, - Secrets of the Underground 00:06
You suddenly get sick, so why not blame it, basically,
S01 • E07 Understanding these changes Helped volcanologists predict. - Secrets of the Underground 00:04
Understanding these changes Helped volcanologists predict.
S01 • E01 Now I want to trace this shaft down into the basement, - Secrets of the Underground 00:09
Now I want to trace this shaft down into the basement,
S01 • E07 Massive eruptions In 1975 and 1984. - Secrets of the Underground 00:06
Massive eruptions In 1975 and 1984.
S01 • E08 Meaning we can move not just through space, but through time. - Secrets of the Underground 00:05
Meaning we can move not just through space, but through time...
S01 • E03 An axe wound is an intense wound. Yeah. Yeah, super-violent crimes. - Secrets of the Underground 00:06
An axe wound is an intense wound. Yeah. Yeah, super-violent ...
S01 • E02 We gotta go downtown and see if we can find the tunnels there. There is definitely a connection. - Secrets of the Underground 00:06
We gotta go downtown and see if we can find the tunnels ther...
S01 • E02 I came to Denver thinking - Secrets of the Underground 00:10
I came to Denver thinking
S01 • E03 Janet believes the eight victims who may have tried to flee - Secrets of the Underground 00:07
Janet believes the eight victims who may have tried to flee
S01 • E07 In 1980, experts and laymen Alike observed a bulge. - Secrets of the Underground 00:05
In 1980, experts and laymen Alike observed a bulge.
S01 • E08 To achieve this, he first has to line up the historical maps - Secrets of the Underground 00:07
To achieve this, he first has to line up the historical maps
S01 • E01 Two flights down lies one of the most iconic rooms in the Seelbach, - Secrets of the Underground 00:08
Two flights down lies one of the most iconic rooms in the Se...
S01 • E07 Growing out of the northern Summit of mount st. Helens. - Secrets of the Underground 00:05
Growing out of the northern Summit of mount st. Helens.
S01 • E03 But what about those other 49, - Secrets of the Underground 00:06
But what about those other 49,
S01 • E08 So, we can start with uh...this map. - Secrets of the Underground 00:05
So, we can start with uh...this map.
S01 • E07 And sure enough, On may 18th of that year, - Secrets of the Underground 00:06
And sure enough, On may 18th of that year,