This site is for informational, educational, and archival purposes related to Volcanic Alert Level (VAL) systems. Volcanic Alert Level systems found on this website should not be used for emergency purposes. For the most recent, official VAL system or current VAL for a particular volcano, please seek out the proper institutional authorities on the matter. Inclusion in the database does not constitute an endorsement.
![United States (Alaska-Aviation) [Legacy Version: 1990–1992]](https://i0.wp.com/global-valid.org/wp-content/uploads/2026/02/88_USGS_AVO.webp?fit=337%2C377&ssl=1)
![United States (Alaska-Aviation) [Legacy Version: 1997–1998]](https://i0.wp.com/global-valid.org/wp-content/uploads/2026/02/89_USGS_AVO.webp?fit=616%2C330&ssl=1)
![United States [Legacy Version: 1977–1983]](https://i0.wp.com/global-valid.org/wp-content/uploads/2026/02/90_USGS-Copy.webp?fit=627%2C213&ssl=1)
![United States [Legacy Version: 1983–2004]](https://i0.wp.com/global-valid.org/wp-content/uploads/2026/02/91_USGS.webp?fit=627%2C213&ssl=1)
![United States (California) [Legacy Version: 1997–2006]](https://i0.wp.com/global-valid.org/wp-content/uploads/2026/02/85_USA_Long_Valley-scaled.webp?fit=553%2C2560&ssl=1)
![United States (California) [Legacy Version: 1991–1997]](https://i0.wp.com/global-valid.org/wp-content/uploads/2026/02/86_USGS_Long_Valley-scaled.webp?fit=655%2C2560&ssl=1)
![Papua New Guinea (Rabaul) [Legacy Version: 1983]](https://i0.wp.com/global-valid.org/wp-content/uploads/2026/02/96_PNG_Rabaul.webp?fit=470%2C241&ssl=1)
![Indonesia [Legacy Version: 1930s]](https://i0.wp.com/global-valid.org/wp-content/uploads/2026/02/98_Indonesia.webp?fit=450%2C954&ssl=1)
![Philippines (Pinatubo) [Legacy Version: May 1991-December 1992]](https://i0.wp.com/global-valid.org/wp-content/uploads/2026/02/94_Philippines_Pinatubo.webp?fit=500%2C369&ssl=1)