U.S. Geological Survey Cascades Volcano Observatory
Montserrat Volcano Observatory
Alaska Volcano Observatory
MEVO - Mount Erebus Volcano Observatory
Hawaiian Volcano Observatory "Volcano Watch"
OVP-INGEOMINAS Observatorio Vulcanologico y Sismologico de Pasto, Colombia
Nordisk Vulkanologisk Institut The Nordic Volcanological Institute (NVI)
Long Valley Caldera: Monitoring Volcanic Unrest
MTU Volcanoes Page