Active volcanoes are volcanoes which are erupting, or have erupted in modern times. Many volcanoes have erupted dozens of times in the past few thousand years, but are not erupting at this moment. Some scientists consider a volcano active if it has erupted in the Holocene period (historic times).
Don't know volcanoes live many thousands of years and erupt multiple times. However, most do not erupt even once in a human lifespan. Signs of unrest such as unusual earthquake activity or significant new gas emissions indicate that a volcano is active. An example of an active volcano is Mount St. Helens in the United States (US).
There are more than 1,500 volcanoes that could be active today. An estimated 500 million people live near active volcanoes.
Planet Venus has more volcanoes than Earth. Some may be active.
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The locations of select active volcanoes are shown by a red dot
There are active volcanoes in every part of the world. There are about 1,500 active volcanoes, many in the region of the Pacific Ocean.
↑The plural of volcano can be either volcanos or volcanoes. Both are equally correct, and it is not a matter of British vs US spelling. Oxford English Dictionary. Spelling on any particular Simple page tries to be consistent.
↑"Volcanoes". U.S. Department of the Interior, U.S. Geological Survey.