| November 27 11:00 h (November 27 17:00 GMT)
In the last 24 hours the monitoring system of Popocatepetl volcano registered 36 exhalations accompanied by emission of steam, gas and small amounts of ash. The most important exhalations yesterday with winds eastward and an approximate height of 500 m above the crater, were recorded at 15:38 hrs. (image 1), 18:10 hrs. (image 2), 18:12 hrs. (image 3). As at 18:37 hrs. (image 4) and 22:04 hrs. (image 5) with winds westward.
Additionally were recorded 37 minutes of low amplitude harmonic tremor, and four volcanotectónics earthquakes occurred today at 01:34 hrs., 2:04 hrs., 2:12 hrs. and 2:14 hrs. with magnitudes of 1.5, 2.7, 1.2 and 1.3 respectively.
During early today incandescence was observed in the crater (image 6) and some exhalations accompanied by ash and northeast direction (image 7). From early hours of today until time of this report you can clearly see the volcano with continuous emission of steam and gas toward the northeast at an altitude of about 800 m above the crater with an extension estimated 35 km on the east flank of the Valley of Mexico (image 8), (image 9).
At November 6, with the support of the Federal Police, an overflight to reconnoiter the crater of the volcano was made. During the flight, dome 53, emplaced during the activity of the night of the 4th to the 5th of November, was seen and estimated to be 250 m in diameter and 30 m thick (VIDEO 1). The presence of this dome could imply the occurrence of
explosions in the following days or weeks, as has happened on previous occasions, and does not imply, for the moment, a change in the alert level.
This type of activity is included 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 short range pyroclastic flows and mudflows .
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. Civil Protection authorities, keep your preventive procedures, in accordance with their operational plans.
4. People, be alert to the official information disseminated.
In case of ashfall, address the following recommendations:
• Cover nose and mouth with a wet handkerchief or face mask.
• Clean eyes and throat with pure water.
• Avoid contact lenses to reduce eye irritation.
• Close windows or cover them up, and stay indoors as much as possible.
Popocatepetl Volcano monitoring is performed continuously 24 hours a day. Any change in activity will be reported in due course.