| SFC/Flight Level 200 |
| Date: 2015-01-13 04:00 UTC | |
| Volcan: | Hunga Tonga-hunga Haapai |
| Area: | Tonga |
| Source: | Pilot Observation |
| Aviation colour code: unknown | |
| Summit elevation: 149m | |
| Eruption Details: | pilot reports 12/2030z indicate no eruption fm the volcano but strong sulphuric smell at |
| This data supplements the official Volcanic Ash Advisory Graphics and Volcanic Ash Advisories. The data is to be used with caution. The official Volcanic Ash Graphics and Volcanic Ash Advisories take precedence in all circumstances. Please refer to national NOTAMs for definitive boundaries of no-fly areas. |
| SFC to FL200 - Ash concentrations between the surface and 20,000 feet. |
| FL200 to FL350 - Ash concentrations between 20,000 feet and 35,000 feet. |
| FL350 to FL550 - Ash concentrations between 35,000 feet and 55,000 feet. |
| SFC to 6000FT - Ash concentrations between the surface and 6,000 feet. |
