Agency: Central Weather Administration (CWA)
Name: Volcanic Activity Levels
Elements of VAL system
| Domain | Terrestrial or All |
| Volcano | Tatun Volcanic Group |
| Number of levels | 4 |
| System range | 0–3 level scale |
| Lowest level | Level 0-Normal |
| Highest level | Level 3-Warning |
| Level name type | Number & Word |
| Level for lack/loss of monitoring | No |
| Description of volcanic activity | Yes |
| Hazards possible at each level | No |
| Locations that could be affected | No |
| Potential impacts | Yes |
| Forecast language | Yes |
| Timing language | Yes |
| Actions to take | No |
| Agency actions | Yes |
| Link to evacuations | No |
| Reporting frequency per level | No |
| Link to monitoring thresholds | No |
| Step-up and step-down language | No |
VAL sources and links
The images below are static examples of VAL information pages and DO NOT represent current alert levels. While we strive to maintain the links below, they may not always work. For the current alert level, please consult the proper institutional authorities.
Observatory Homepage
Related References
Central Weather Administration, Ministry of Transportation and Communications. (2020, ammended 2025). Guidelines for the Release of Volcanic Activity Information. https://www.cwa.gov.tw/Data/service/notice/download/Notice_catalog_20250203170145.pdf
Central Weather Administration. (2021). Seminar on the Application of Meteorological Disaster Prevention Information Application of the Central Weather Bureau’s earthquake monitoring and reporting operations to disaster prevention. https://www.cwa.gov.tw/V8/C/P/conference/2021data/course09.pdf