| Grimsvotn(noun, name, volcano, geology) |
| Guallatiri(noun, name, volcano, geology) |
| Guguan(noun, name, volcano, geology) |
| Hachijo-jima(noun, name, volcano, geology) |
| Hallasan(noun, name, volcano, geology) |
| Hekla(noun, name, volcano, geology) |
| Helgafell(noun, name, volcano, geology) |
| Hengill(noun, name, volcano, geology) |
| Hiuchi(noun, name, volcano, geology) |
| Hualalai(noun, name, volcano, geology) |
| Huaynaputina(noun, name, volcano, geology) |
| Hverfjall(noun, name, volcano, geology) |
| Iliboleng(noun, name, volcano, geology) |
| Iliwerung(noun, name, volcano, geology) |
| Inielika(noun, name, volcano, geology) |
| Iojima(noun, name, volcano, geology) |
| Irruputuncu(noun, name, volcano, geology) |
| Isluga(noun, name, volcano, geology) |
| Izalco(noun, name, volcano, geology) |
| Izu-Tobu(noun, name, volcano, geology) |