| Amirani(noun, name, volcano, geology) |
| Anatahan(noun, name, volcano, geology) |
| Andagua volcanic field(expression, name, volcano, geology) |
| Aogashima(noun, name, volcano, geology) |
| Apacheta-Aguilucho volcanic complex(expression, name, volcano, geology) |
| Aracar(noun, name, volcano, geology) |
| Arjuno-Welirang(noun, name, volcano, geology) |
| Asacha(noun, name, volcano, geology) |
| Askja(noun, name, volcano, geology) |
| Atsonupuri(noun, name, volcano, geology) |
| Avachinsky(noun, name, volcano, geology) |
| Azufral(noun, name, volcano, geology) |
| Bagana(noun, name, volcano, geology) |
| Baransky(noun, name, volcano, geology) |
| Baroarbunga(noun, name, volcano, geology) |
| Baugur(noun, name, volcano, geology) |
| Beerenberg(noun, name, volcano, geology) |
| Bezymianny(noun, name, volcano, geology) |
| Blue Lake(expression, name, volcano, geology) |
| Bola(noun, name, volcano, geology) |