Table 1 Emergency Response Level (Phase and Situation), Volcanic Activity Levels and Volcanic Traffic Light defined in the PEVOLCA (BOC 2010 ) and translated into English
Phase | Situation | Volcanic activity levels (VAL) | VTL color |
|---|---|---|---|
Normality | Stability | 1. Parameters in normal condition | Green |
Pre-alert. | 2. Moderate. One parameter shows anomalies | ||
3. Moderate-increasing. One parameter shows anomalies with a clear increase of the eruptive dynamic | |||
Pre-emergency | Alert | 4. Strong. Several parameters show anomalies | Yellow |
5. Intense. Indicators are consistent with a pre-eruptive phase | |||
Emergency | Max. Alert | 6. Pre-eruptive phenomena | Red |
1 | 7. The start of an eruption | ||
2 | 8. The start of a major eruption | ||
Alarm | 9. Extremely violent volcanic activity |