Volcanic Ash Advisory Centers (VAACs) are specialized organizations that monitor volcanic activity and provide timely information about volcanic ash clouds. They analyze data from satellites, ground observations, and meteorological models to assess the impact of eruptions on air travel and public safety. There are several VAACs around the world, each responsible for a specific region. They issue advisories and alerts to airlines, governments, and the public, helping to mitigate the risks associated with volcanic eruptions. This information is crucial for ensuring safe air travel and protecting communities near active volcanoes.