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Geothermal energy



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Finding Geothermal Energy

Posted on December 24, 2011 at 12:10 AM Comments comments (0)

Finding Geothermal Energy

What are the characteristics of geothermal resources? Some visible

features of geothermal energy are volcanoes, hot springs, geysers,

and fumaroles. But you cannot see most geothermal resources. They

are deep underground. There may be no clues above ground that a

geothermal reservoir is present below.

Geologists use different methods to find geothermal reservoirs. The

only way to be sure there is a reservoir is to drill a well and test the

temperature deep underground.

The most active geothermal resources are usually found along

major plate boundaries where earthquakes and volcanoes are

concentrated. Most of the geothermal activity in the world occurs

in an area called the Ring of Fire. This area borders the Pacific Ocean.

History of Geothermal Energy

Posted on December 24, 2011 at 12:10 AM Comments comments (0)


History of Geothermal Energy

Geothermal energy was used by ancient people for heating and

bathing. Even today, hot springs are used worldwide for bathing,

and many people believe hot mineral waters have natural healing


Using geothermal energy to produce electricity is a new industry.

A group of Italians first used it in 1904. The Italians used the natural

steam erupting from the Earth to power a turbine generator.

The first successful American geothermal plant began operating

in 1960 at The Geysers in northern California. There are now just

under 60 geothermal power plants in seven states, with many more

in development. Most of these geothermal power plants are in

California with the remainder in Nevada, Hawaii, Idaho, Montana,

and Utah

What is Geothermal Energy?

Posted on December 24, 2011 at 12:10 AM Comments comments (0)


What is Geothermal Energy?

The word geothermal comes from the Greek words geo (Earth) and

therme (heat). Geothermal energy is heat from within the Earth.

Geothermal energy is generated in the Earth’s core, almost 4,000

miles beneath the Earth’s surface. The double-layered core is made

up of very hot magma (melted rock) surrounding a solid iron center.

Very high temperatures are continuously produced inside the Earth

by the slow decay of radioactive particles. This process is natural in

all rocks.

Surrounding the outer core is the mantle, which is about 1,800 miles

thick and made of magma and rock. The outermost layer of the

Earth, the land that forms the continents and ocean floors, is called

the crust. The crust is three to five miles thick under the oceans and

15 to 35 miles thick on the continents.

The crust is not a solid piece, like the shell of an egg, but is broken

into pieces called plates. Magma comes close to the Earth’s surface

near the edges of these plates. This is where volcanoes occur. The

lava that erupts from volcanoes is partly magma. Deep underground,

the rocks and water absorb the heat from this magma.

We can dig wells and pump the heated, underground water to the

surface. People around the world use geothermal energy to heat

their homes and to produce electricity.

Geothermal energy is called a renewable energy source because

the water is replenished by rainfall and the heat is continuously

produced deep within the Earth. We won’t run out of geothermal