| October 22 11:00 h (October 22 16:00 GMT)
In the last 24 hours the monitoring system of Popocatepetl volcano recorded 28 low-intensity exhalations accompanied by emissions of steam, gas and sometimes a little amount of ash (Image 1).
At night incandescence was observed over the crater (Video 1).
Early morning with a close up at the crater we observe an emission of steam and gas (Video 2). At the time of this report it is observed an emission towards southeast (Image 2).
On 14 October, with support from the Federal Police, CENAPRED and CNPC made a reconnaissance overflight to see the conditions of the crater of Popocatepetl volcano. It was observed that the inner crater, formed in July 2013, has increased its diameter , probably due to the destruction of the dome and walls collapsing, reaching an estimated 350 m diameter. The bottom of the inner crater is about 100 m below the floor of the main crater (Image 3).
No residues were observed of the 52nd dome, which was emplaced in the bottom of the inner crater early last August. Instead, the bottom of the inner crater is cup-shaped and is covered with tephra (fragmented material) (Image 4). Most emissions of steam are coming from a crack in the north wall of the inner crater, while ash emissions, originate in the bottom of the crater, in the area covered by tephra.
The video shows in detail the internal cráter, that is 350 m in diameter and 100 deep (Video 2) . The emission of an intermittent small plume of brown ash can be seen originating from the tephra-covered bottom of the crater, which lasted under one minute. This plume corresponds to the signal detected by teams CENAPRED at 11:38 (Imagen 5). Some white fumaroles are also observed in the crater wall.
These observations confirmed that the explosions occurred in late September and early October destroyed the 52nd dome, and that the activity that the volcano has recently presented continues the cycle of construction and destruction of domes that has characterized the Popocatépetl in the last 20 years.
This type of activity is foreseen within the scenarios
Volcanic Traffic Light Yellow Phase 2.
The scenarios foreseen for this phase are:
1. Explosive activity of low to intermediate level.
2. Ash fall in nearby towns.
3. Possibility of pyroclastic flows and mudflows short range.
Special emphasis is placed on the following recommendations:
1. Continue the safety radius of 12 km, so staying in that area is not allowed.
2. Keep the controlled traffic between Santiago Xalitzintla and San Pedro Nexapa through Paso de Cortés.
3. A Civil Protection authorities, keep your preventive procedures, in accordance with their operational plans.
4. People, being alert to the official information disseminated.
Popocatepetl Volcano monitoring is performed continuously 24 hours. Any change in activity will be reported in due course.