In order to understand, track, and contextualize alert level changes at volcanoes around the world, we built the global Volcanic Alert Level Information Database (VALID). The database contains information about 92 Volcanic Alert Level (VAL) systems from 32 countries. VAL systems differ in a number of ways, most notably by the way levels are named, the domain that they apply to, and the number of levels in the system.
Database Development
Accompanying Publications
A full description of the database can be found in this open-access Applied Volcanology article:
Using the Database
The database can be searched or browsed by country using.
Descriptions of VAL system design and content types are explained on the Diversity of VAL Systems topic pages. These pages provide general information and analysis of the contents of the database.
About Us
The following people have contributed to VALID:
Citations and Copyright
Reference article citation:
General database and website citation:
Individual VAL Systems: