Volcanoes Explained: How Earth Builds and Erupts
Volcanoes Explained is a science podcast that traces how magma, lava, gas, ash and shifting tectonic plates combine to build and reshape the Earth. Each episode breaks the geology down into plain language, explaining what is generally known about volcanic systems. The show is careful to separate broad scientific understanding from current hazard guidance. It also points listeners to the official and scientific sources behind each story.
Episodes
What Volcanic Ash Really Is
The word ash suggests something soft and powdery, the gray remains of paper or wood after a fire.
Inside this episode:
- Ash Is A Size Category
- How Magma Becomes Particles
- Water Can Shatter Rock Too
- A Grain Under The Microscope
- The Column Rises
Sources include the references linked below.
Sources and further reading:
- [U.S. Geological Survey, Volcanic Ash](https://volcanoes.usgs.gov/v
How Volcanoes Build Islands
An island can begin where no land is visible.
Inside this episode:
- Not Every Island Has The Same Origin
- Beginning Under Pressure
- The Shield Stage
- Breaking The Surface
- Lava Extends The Shore
Sources include the references linked below.
Sources and further reading:
- [U.S. Geological Survey, Geology of Hawaii Volcanoes National Park](https://www.usgs.gov/geology-and-ecology-of-national
Why Some Volcanoes Flow and Others Explode
At one volcano, glowing lava pours from a vent and moves across the ground. At another, a column of ash climbs into the sky as gas and shattered rock burst outward.
Inside this episode:
- Eruptions Form A Spectrum
- Viscosity Means Resistance To Flow
- Silica Builds Networks
- Gas Is Dissolved Deep Below
- A Runny Magma Can Release Gas
Sources include the references linked below.
Sources and f
From Magma to Lava: A Journey Through a Volcano
Far beneath a volcano, rock begins to change. It does not enter a giant underground lake of fire. Instead, part of the solid rock melts within a hot, pressurized mixture of crystals, liquid, and dissolved gas.
Inside this episode:
- Earth Is Mostly Solid
- Why Magma Rises
- A Mixture Full Of Crystals And Gas
- Magma Can Stop
- A Volcano Is Not Hollow
Sources include the references linked below.
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