How many active volcanoes are there in the World?

Question

I know this is a simple question, but it's for homwework, and i searched the search engine and they say over a thousand then i search again and i get a different number. So anyone who knows around the percise estimate please tell me. I narrowed my possible answers down to c. 600 and d.900. Please don't give me just an answer give me where you found this, or an explanation to go along. thank you. 10 points best answer you know. :]

Answer 1

We know of at least 1500 active volcanoes around the world. That is a big increase from the number that we used to think was correct. ...

The absolute number of volcanoes that exists depends on your definition: active only, active, dormant plus extinct volcanoes? And even if we decide on a definition, nobody has really counted all of the volcanoes, especially the tens on thousands on the sea floor. The best guess is 1511 volcanoes have erupted in the last 10,000 years and should be considered active. This number is from the new Smithsonian Institution book, "Volcanoes of the World: Second Edition" compiled by Tom Simkin and Lee Siebert.

How many active volcanoes known?

Erupting now: perhaps 20

Each year: 50-70

Each decade: about 160

Historical eruptions: about 550

Known Holocene eruptions (last 10,000 years): about 1300

Known (and possible) Holocene eruptions: about 1500

Usually, active means that they have erupted in known history.  Using the info from these different sites, I would say that 1500 is probably your best number.

Answer 2

on dry ground only or under the ocean as well?