Question

How are volcanoes classified based on the periodicity of their eruptions?

Answer 1

Based on the periodicity of eruptions, volcanoes are classified into

• Active Volcano:
  Active volcanoes are those which constantly eject volcanic lava, gases and fragmented materials Eg: Mount St. Helens in the United States.

• Dormant Volcano:

1. Volcanoes that do not show any sign of volcanic activity for a long period of time are known as dormant volcanoes.
2. Sometimes there may be a sudden explosion which may cause unimaginable loss to life and property.
3. Eg: Mt. Fuji, Japan

• Extinct or Dead Volcano:
  When a volcano permanently stops its volcanic activity, then it is called an extinct or dead volcano. Eg: Mt. Kilimanjaro, Tanzania.