USGS Frequently Asked Questions

FAQ's about Volcanoes

Do earthquakes cause volcanoes?

How many active volcanoes are there in the world?

Is there a relationship between large earthquakes (>M 6) that occur along major fault zones and nearby volcanic eruptions?

What kind of school training do you need to become a volcanologist?

What volcanoes in the conterminous United States have erupted since the Nation was founded?

Where can I find information about volcanoes?

Can an eruption at one volcano trigger an eruption at another nearby volcano (for example, within about 10 km)?

What is plate tectonics?

What is a landslide, and what causes them?

What instruments, tools, and methods do you use to study volcanoes?

Is it dangerous to work on volcanoes and what precautions do scientists take?

What do we know about the interior of the Earth?

What is the "Ring of Fire"?

What is a volcano?

Does the U.S. produce any power using natural steam energy?

How much of the Earth is volcanic?

Is there evidence for a cause and effect relationship between eruptions that occur at about the same time from volcanoes located hundreds to thousands of km apart?

What emergency supplies do I need?

Where did the term "volcano" come from?

What is an "eruption" ?

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