[1] There are 1,350 potentially active volcanoes around the world, 500 of which have erupted in historical time.
[2][3] An estimated 500 million people live near active volcanoes.
[3] Historical time (or recorded history) is another timeframe for active.
[4][6] As of March 2021[update], the Smithsonian Institution's Global Volcanism Program recognizes 560 volcanoes with confirmed historical eruptions.
Campi Flegrei in Italy and Ilopango in El Salvador both have populations of over 2 million people living within 5 kilometers (3.1 mi) of the volcanoes.