What technology did the U.S. Geological Survey (USGS) develop to help monitor volcanic activity at the five monitoring stations in the continental U.S., Alaska, Hawai'i, and the Mariana Islands?

National Volcano Early Warning System (NVEWS) National Volcano Early Warning System (NVEWS) Volcano Notification Service (VNS) Volcano Notification Service (VNS) National Seismology Center National Seismology Center Federal Emergency Management Agency (FEMA)

The technology developed by the U.S. Geological Survey (USGS) to help monitor volcanic activity at the five monitoring stations is the Volcano Notification Service (VNS).