Note: This VAL system was replaced. The updated VAL system can be found here.
Agency: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Name: Mayon Volcano Alert Signals
Elements of VAL system
| Domain | Terrestrial or All |
| Volcano | Mayon |
| Scheme range | 0–5 level scale |
| Lowest level | 0 |
| Highest level | 5 |
| Level name type | Number & Word |
| Level for lack/loss of monitoring | No |
| Volcanic activity | Yes |
| Hazards possible | Yes |
| Locations affected | Yes |
| Potential impacts | Yes |
| Forecast language | Yes |
| Timing language | Yes |
| Actions to take | Yes |
| Agency actions | No |
| Link to evacuations | Yes |
| Reporting frequency per level | No |
| Link to monitoring thresholds | No |
| Step-up and step-down language | No |