Volcano Live
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Volcano Alerts - John Seach
Note: Information here is for educational purposes only.
It does not replace formal disaster information.
In an emergency seek advice from local authorities.
There are two main volcano warning systems - colour codes, and alert levels. Warning systems are specific for each volcano.
Indonesia Alert System
Aktif Normal |
Monitoring of visual, seismicity and other volcanic event do not indicate changes. | No eruption in foreseeable future. |
Waspada |
Increasing activity of seismicity and other volcanic events, and visual changes around the crater. | Magmatic, tectonic or hydrothermal disturbance, no eruption imminent. |
Siaga |
Intensively increasing of seismicity with supported by other volcanic monitoring, obvious changes of visual observation and crater. based on observation data analysis, the activity will be followed by main eruption. | If trend of increasing unrest continues, eruption possible within 2 weeks. |
Awas |
Following the main eruption, the initial eruption begin to occur as ash and vapor. Based on observation data analysis, the activity will be followed by main eruption. | Eruption possible within 24 hours. |
New Zealand Alert System
| Typical background surface activity; seismicity, deformation and heat flow at low levels. | Usual dormant, or quiescent state. | |
| Apparent seismic, geodetic, thermal or other unrest indicators. | Initial signs of possible volcano unrest. No eruption threat. | |
| Increase in number or intensity of unrest indicators (seismicity, deformation, heat flow etc). | Confirmation of volcano unrest. Eruption threat. | |
| Minor steam eruptions. High-increasing trends of unrest indicators, significant effects on volcano, possibly beyond. | Minor eruptions commenced. Real possibility of hazardous eruptions. | |
| Eruption of new magma. Sustained high levels of unrest indicators, significant effects beyond volcano. | Hazardous local eruption in progress. Large scale eruption now possible. | |
| Destruction with major damage beyond active volcano. Significant risk over wider areas. | Large hazardous volcanic eruption in progress. |
Alaska Alert System
| No eruption anticipated. Volcano is in quiet, “dormant” state. |
|
| An eruption is
possible in the next few weeks and may occur with little or no additional
warning. Small earthquakes detected locally and (or) increased levels of volcanic gas emissions. |
|
| Explosive eruption
is possible within a few days and may occur with little or no warning.
Ash plume(s) not expected to reach 25,000 feet above sea level. Increased numbers of local earthquakes. Extrusion of a lava dome or lava flows (non-explosive eruption) may be occurring. |
|
| Major explosive
eruption expected within 24 hours. Large ash plume(s) expected to reach
at least 25,000 feet above sea level. Strong earthquake activity detected even at distant monitoring stations. Explosive eruption may be in progress. |