Written in SCIENCE he
The National Civil Protection Coordination has just announced on its social platforms that after reviewing the provisions of the Volcanic Alert Traffic Light in its various phases, the Scientific Advisory Committee of the Popocatepetl volcano made the decision to issue the corresponding recommendation to change the level from Amarillo Phase 2 to Yellow Phase 3. Next, we detail what is means this change.
According to Volcanic Alert Traffic Lightthe Phase 3 Yellow It corresponds to an intermediate to high activity of the Popocatépetl volcano that is mainly characterized by the 2 situations that we describe below:
- Rapid growth of large domes and their destruction in strong explosions
- Persistence of fumaroles, gas and slight fall of ash in nearby areas
In the determination of the Scientific Advisory Committee, the reason for raising the Volcanic Alert Traffic Light from Phase Yellow 2 to Yellow Phase 3:
“The Scientific Advisory Committee points out that the general activity continues to show a gradual increase through various parameters that identify changes in its behavior with respect to previous stages, although without reaching its levels of activity with low speed. Based on the above and After reviewing the provisions of the Volcanic Alert Traffic Light in its different phases, the conclusion was reached to make the corresponding recommendation to change the level from Yellow Phase 2 to Yellow Phase”, as detailed a few minutes ago by the National Civil Protection Commission.
The parameters indicated by the Volcanic Alert Traffic Light for Phase 3 are:
- Low-intensity explosive eruptive activity: mild to moderate explosions can be expected in this phase, throwing fragments around the crater
- Light to moderate rains in surrounding towns and in some distant cities
- aviation risk
- Significant growth of domes and possibility of magma eruption
- Explosions of increasing intensity that launch fragments considerable distances
- Notorious ash rains over towns and cities.
What are the PHASES that follow in the Volcanic Alert Traffic Light after Phase 3 Yellow?
If the activity of the Popocatepetl volcanothere are only two more alerts left in the Volcanic Alert Traffic Light in the color red; in Phase 1 and Phase 2 that we describe so that the people living in the area closely follow the situation and how it develops in the next hours or days:
Alarm (Red): Color used to write that there is danger and that people near the area must be ready to evacuate. It consists of Phase 1 and Phase 2:
Phase 1:
- Intermediate to High Hazard Explosive Activity
- Eruptive column of several kilometers of water vapor and gas
- Launch of incandescent fragments on the slopes of the volcano
Phase 2:
- High to Extreme Hazard Explosive Activity
- Powerful eruptive columns
- Intense fall of ash, sand and volcanic fragments at greater distances
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