- Alaska Volcano Observatory@
- Cascades Volcano Observatory
 - USGS provides information about Mount St. Helens current and past activity as well as monitoring the other volcanoes of the Cascade Range. - Darwin Volcanic Ash Advisory Centre
- Monitors volcanic ash clouds over Southeast Asia and Papua New Guinea.
- Hawaiian Volcano Observatory
- Features information about Kilauea, Mauna Loa, and other volcanoes in the Hawaiian Islands, eruption reports, Volcano Watch articles, earthquakes, types of volcanic hazards, and more.
- Long Valley Caldera Observatory
- Manages the monitoring efforts for the Long Valley Caldera in east-central California.
- New Millennium Observatory (NeMO)
- Studies the dynamic interactions between submarine volcanic activity and seafloor hotsprings at an observatory, Axial seamount.
- Usu Volcano Observatory
- Includes photos of the volcano. From the institute of Seismology and Volcanology, Hokkaido University.
- Yellowstone Volcano Observatory (YVO)
- Monitoring the largest volcanic system in North America. Includes monitoring data, volcanic history of the Yellowstone Plateau, photo galleries, and FAQs.
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