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Many of the Earth's volcanoes have been continuously erupting for years.
The biggest volcano on Earth is one of the five volcanoes in Hawaii - Mauna Loa. It towers 13,000 feet above sea level.
The fine ash particles in the atmosphere from a volcano make sunsets more colorful.
Volcanoes that are not currently active, but may erupt again, are labeled dormant.
Iceland is known as the land of fire and ice because it sits on top of some of the most active volcanoes at the Atlantic's mid-oceanic ridge.
The volcano under Yellowstone is a supervolcano, the most formidable of volcanoes.
Indonesia is thought to have the largest number of active volcanoes - a total of 76.
The volcanic rock called pumice is the only rock that can float on water.
There are at least 1,500 active volcanoes across the globe.
The underground, volcanic chambers that contain magma can quietly remain underground for hundreds of years.
The 1991 eruption of Mount Pinatubo in the Philippines spewed 22 million tons of sulfur dioxide into the atmosphere, which encircled the entire planet and brought the global temperature down 0.5 degrees C (0.9 degrees F).
Posted July 2012 | Permanent Link
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