The first volcano erupted approximately 4.5 billion years ago. This is when the earth first came into existence, and long before the first humans walked the earth, according to Scholastic, Inc.Continue Reading
The most catastrophic volcanic eruption in modern times took place in 1815. A volcano named Tambora erupted in Indonesia, causing the death of approximately 90,000 people, though most of them died from starvation rather than as a direct result of the eruption.
When a volcano has an intense, explosive eruption, it can fling rocks at a velocity of up to 670 miles per hour. Generally speaking, when a volcano starts to erupt, the eruption continues for around 10 years. Some eruptions have been known to last for hundreds of years.Learn more about Volcanoes
Reliable, up-to-date information on Hawaiian volcano activity is available on the website of the United States Geological Survey. The USGS monitors global seismic activity and distributes information about volcano and earthquake activity on a daily basis.Full Answer >
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 create a caldera, which holds Crater Lake.Full Answer >
A dome volcano, or a lava dome, occurs when a dome forms over the vent of a volcano because the eruption is too slow. Once the lava cools down, it forms a dome. The domes are typically fairly steep and filled with silica-rich lava, which is prone to explosions.Full Answer >
A volcano that no longer erupts but has the potential to erupt again is called a dormant volcano. If the volcano has not erupted for at least 10,000 years and is unlikely to erupt again in the foreseeable future, it is called an extinct volcano. These types of volcanoes are different from an active or erupting volcano.Full Answer >