How to pronounce “volcan” in English

Volcanologists— who are not a species from “Star Trek” but rather scientists who study volcanoes— keep tabs on the amount of magma held within the volcano's underground reservoir,

Volcanoes are where we find a lot of our most prized minerals, like gold, silver, copper, lead, and zinc.

Volcanoes are a love of mine.

Volcanoes have been doing it forever.

Volcano and Cojo um so I just I fell in love with films so I I've always been like a film

Volcanoes could come back at any point, really big mega volcanoes.

volcanic activity is the definition of some of the biggest tsunamis the cause of some of the biggest tsunamis around

volcanoes do. We know from history the volcanoes cool off the planet. Mount Pinatubo which erupted in the Philippines in 1991 lowered the temperature of the Earth for about a degree

volcanoes on Mars and so the as the dust cleared the view became spectacular and

the volcanoes that still erupt in Iceland today, that started to erupt back then, there are much more powerful back then. There was a lot more lava back then, and all that lava burning through the

The volcano shot out tons of lava and volcanic ash, buckling the earth into a depression about the size of Singapore.

But volcanoes aren’t just mountains— especially because they erupt.

Composite volcanoes erupt with remarkable variety, sometimes unleashing torrents of lava, other times sending up volcanic plumes of tephra that fall back to Earth.

So volcanoes come in all kinds of shapes and sizes, and you can find them all over the world.

Many volcanic eruptions happen at plate boundaries: places where the tectonic plates that make up Earth’s outermost layer squish together or spread apart.

Dormant volcanoes aren’t erupting right now but might in the future.

Thick volcanic ash can blanket crops, collapse structures, and suffocate people and animals.

Massive volcanoes in Indonesia, Russia, even Antarctica.

Those volcanoes could have also released nitrogen and water vapor, which built up in it.

Explosive volcanoes oozing red-hot lava.

Super volcanoes, big volcanoes, super-- OK, great.

Lassen Volcanic National Park.

the volcano and start walking down that and when we finally reach the bottom of this lake bed we were caught in an

This volcanic soil, it's like amazing for building sand bars and creating opportunities for really good waves.

Its volcanic crags barely poke above the ocean.

And volcanic, too. Yeah, Manoa Falls, that's right.

Mega volcanoes actually are kind of exciting.

The volcano is probably 5 miles across and you can see a little pink parachute in kind of the upper left and that's one of my French

these enormous volcanoes started to erupt about 250 million years ago. And these are not volcanoes like those that we know today. It's hard to even envision what these were like.

That’s enough volcano-stuff to fill 400 million Olympic swimming pools.

And just because a volcano has had one, or even two, supereruptions in the past, doesn't mean its future blasts will be as hefty.

And extinct volcanoes were active once, but aren’t expected to erupt ever again— even though they can surprise us once in a while.

And the heat of volcanic systems can be tapped for geothermal energy, which we’ll get more into in a later episode.

Geologists and volcanologists monitor warning signs of volcanic activity, like earthquakes, swelling in the ground, and steam rising ominously from places it shouldn’t.

There’s more on volcano preparedness in the links below.

And there are underwater volcanoes called seamounts, where violent, submarine, volcanic eruptions built up mountains on the seafloor.

They’re remnants of volcanic eruptions that happened millions of years ago.

Remember all those volcanoes on that hot, baby Earth?

One theory is that volcanic eruptions released gases like carbon dioxide and methane, which made up Earth’s early atmosphere.

This is another classic volcano.

Because this volcano in the photo is erupting.

This is El Reventador volcano in Ecuador, and its name in Spanish means "the eruptor." As you can see, it was happy to oblige

or is this volcano likely to just sort of simmer along as it has been?

So this is a volcanic crater at the summit of what, to me, is one of the most interesting volcanoes on Earth.

especially with volcanoes. Local scientist expertise is always going to be better than having a team from the US parachuting in

How do volcanoes work?

being emitted by the volcanic activity just under the Earth, and it's way more concentrated there, and it's choking.

But some volcanoes have a cloud that actually gets sulfur into the stratosphere.

This all volcanic mountain.