Some Facts and Figures
- More than 80% of the Earth’s surface was created by volcanic action.
- Most of the 550 active volcanoes are found along the edges of the Earth’s tectonic plates.
- More than half of these encircle the Pacific Ocean in the so-called ‘Ring of Fire’.
- Indonesia is the country with the most volcanoes.
- The biggest active volcano in the world is Mauna Loa in Hawaii.
- CO2 emissions from volcanoes on land average about 100th of human CO2
- Volcanoes are not always mountain-shaped. Some volcanoes form depressions in the Earth because the loss of magma causes the Earth to sag.
- It is estimated that about 60 volcanoes erupt every year around the world. The majority of these are very weak.
- The red hot pyroclastic flows can reach speeds of 700km per hour.