ADDENDUM
My apologies, I just realized that I used the word "active", perhaps somewhat inappropriately, to describe erupting volcanoes. An active volcano is not necessarily one that is erupting. There are thousands if not millions of "active" volcanoes not erupting. The number is really hard to determine because there are many undersea volcanoes still being discovered. So, while there are potentially thousands that are "active", presently we are averaging 40 volcanoes that are erupting, which is twice the usual number.
Thank you for your patience
Freddie

PEACE