The images below were collected by the GeoEye-1 satellite and are provided courtesy of GeoEye.
Mount Nyiragongo Volcano, Congo

Redoubt Volcano, Alaska
Comoros Volcano, Comoros Archipelago (Indian Ocean), After Eruption
Comoros Volcano, Comoros Archipelago (Indian Ocean), Before Eruption
Diamond Head Volcano, Hawaii
Galeras Volcano, Colombia
Krakatau Volcano, Indonesia
Montagu Island Volcano, South Sandwich Islands
Nyamuragira Volcano, Congo