Cool Volcano Facts for Kids
Geologists estimate that 1, erupted in the last 10, years. Three quarters of all eruptions happen underneath the ocean, and most are actively erupting and no geologist knows about it at all.
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If you add the underwater volcanoes, you get an estimate that there are a total of about 6, volcanoes that have erupted in the last 10, years. But then you knew that.
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Some of the most deadly volcanoes include Krakatoa, which erupted in , releasing a tsunami that killed 36, people. When Vesuvius exploded in AD 79, it buried the towns of Pompeii and Herculaneum, killing 16, people. Mount Pelee, on the island of Martinique destroyed a town with 30, people in The most dangerous aspect of volcanoes are the deadly pyroclastic flows that blast down the side of a volcano during an eruption.
These contain ash, rock and water moving hundreds of kilometers an hour, and hotter than 1, degrees C. Geologists measure volcano eruptions using the Volcano Explosivity Index, which measures the amount of material released.
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Helens was a 5 out of 8, releasing a cubic kilometer of material. The largest explosion on record was Toba, thought to have erupted 73, years ago. It released more than 1, cubic kilometers of material, and created a caldera km long and 30 kilometers wide. The explosion plunged the world into a world wide ice age. Toba was considered an 8 on the VEI. Olympus Mons, on Mars, is a giant shield volcano that rises to an elevation of 27 km, and it measures km across.
A single hotspot was able to bubble away for billions of years, building the volcano up bigger and bigger.
Fun Volcano Facts for Kids - Interesting Facts about Volcanoes
Both are shield volcanoes that rise up from the bottom of the ocean. Points at the equator are further from the center of the Earth than the poles. We have written many articles about volcanoes for Universe Today. You might also want to read on the 10 facts about earth. Want more resources on the Earth?
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17 explosive volcano facts!
Volcanoes are classified as active, dormant or extinct depending on the amount of volcanic activity happening. When you imagine a volcano, you might picture it as a large, slope-sided mountain, but volcanoes can actually be a variety of shapes. Shield flat , composite tall and thin , cinder cones circular or oval cones , and lava domes where dome-shaped deposits of hardened lava have built up around the vent, as the lava is too thick to flow very far.
Magma is the name given to hot liquid rock inside a volcano.
Check out some fascinating facts about volcanoes!
If you used a glass thermometer to take the temperature it would melt. The ash deposits preserved the town and the remains of the people within it. You can still see them today! About 1, volcanoes on Earth are considered active and are likely to explode again — yikes! In Krakatau in Southeast Asia erupted, releasing megatrons of energy, the equivalent of 15, nuclear bombs!