How many volcanoes are on earth?

There are about 1,500 potentially active volcanoes worldwide, aside from the continuous belt of volcanoes on the ocean floor. About 500 of these have erupted in historical time. Many of these are located along the Pacific Rim in what is known as the 'Ring of Fire.' read more

At present, there are about 600 volcanoes that have had known eruptions during recorded history, while about 50-70 volcanoes are active (erupting) each year. At any given time, there is an average of about 20 volcanoes that are erupting. read more

There are about 1,500 potentially active volcanoes worldwide, aside from the continuous belt of volcanoes on the ocean floor. About 500 of these have erupted in historical time. read more

About 50-70 volcanoes have erupted over the course of the last year, and 160 erupt during a single decade. There are 550 volcanoes that have been active in all recorded history, and geologists have located an additional 1300 volcanoes that have erupted in the last 10,000 years. read more