An active volcano is one that has had at least one eruption in the past 10,000 years. An active volcano can be dormant or erupting.Know More
Scientists use different terms to classify volcanoes. An erupting volcano is one that is having an eruption. A dormant volcano is an active volcano that is supposed to erupt again. An extinct volcano is one that has not erupted in the last 10,000 years and is not expected to erupt again.
There are around 500 active volcanoes throughout the world. Between 50 and 70 of these erupt each year and 160 have erupted in the last 10 years. Approximately 550 volcanoes have erupted since the beginning of recorded history and some of these are now extinct.
Generally, when speaking of volcanoes, geologists don't include those that are underwater. Scientists believe more than 75 percent of the lava that reaches the Earth's surface happens underwater.
Active volcanoes show signs of unrest or are currently erupting. A volcano is classified as extinct when the lava supply in the magma chamber of the volcano dries up. However, on occasion, extinct volcanoes will erupt.
Single active volcanoes may be part of long volcanic fields that can be hundreds of miles long.Learn More
Mt. Shasta is classified as a steed-sided stratovolcano. The volcano is located in Siskiyou County, California along the I-5 corridor.Full Answer >
When magma cools and hardens, it forms what scientists call igneous rock. The time it takes for hot magma to turn into igneous rock varies and depends upon its composition and location.Full Answer >
Laki is both a mountain and a volcanic fissure. It erupted on June 8, 1783 and continued until February 1784, causing a devastating impact on the living beings and surrounding environment. The mountain was not completely breached by the fissure and only had small craters with lava.Full Answer >
No two volcanoes are exactly the same, as they all have differences in dimensions of their mountains and craters, as well as their relative frequency and type of eruption. Volcanoes come in cinder cone, shield and stratovolcano varieties.Full Answer >