Mount Mazama last erupted in 2290 B.C. The eruption was so severe that the volcano collapsed, forming a caldera. This means that during the eruption, the volcano sank into the ground, creating a giant crater. The crater ... More »

Mount Mazama is a composite volcano. It is made of multiple layers of lava flows and fragmented debris. Mount Mazama had a violent eruption around 5677 B.C., which caused the main height of the volcano to collapse and cr... More »

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The first recorded eruption of Mount Fuji occurred in the year 781, and it has erupted 16 times since then, with the last recorded eruption occurring in 1707. Mount Fuji is currently classified as dormant, but eruption i... More »

Mount Mazama is a composite volcano. It is made of multiple layers of lava flows and fragmented debris. Mount Mazama had a violent eruption around 5677 B.C., which caused the main height of the volcano to collapse and cr... More »

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Mount Etna has destroyed numerous towns since its first recorded eruption in 122 B.C., including the towns of Nicoli, Catania and Zafferana. In addition to destroying towns, the volcano has caused thousands of fatalities... More »

Mount Etna has erupted over 200 times since its first noted eruption in 1500 B.C. Mount Etna is the largest and most active volcano in Europe. More »

The eruption of Mount Pinatubo in 1991 was the second largest volcanic eruption of the 20th century. The eruption released a huge volume of volcanic ash and sulfur dioxide into the atmosphere. This caused the planet to e... More »

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