Abr 20 13:00 (18:00 Abr 20 GMT)
Since the last report 5 hours ago, the monitoring system registered several segments of spasmodic tremor and exhalation sequences. During the firts of this segments, between 07:10 to 09:12 h., 40 medium intensity exhalations were recorded. This exhalations were accompanied by a steam, gas and ash plume and by incandescent fragments that roll down the outer slopes of the volcano for up to 1 km (see image 1) (see image 2) . Later, since 10:24 h. to 11:52 h., the monitoring system recorded spasmodic tremor of high magnitude. During the last hour and until the moment of this report another spasmodic tremor is recorded, including exhalation signals within it, also accompanied by a steam, gas and ash plume (ver imagen 3) .
At the moment, there is only partial visibility to the volcano. During early morning, the steam, gas an ash plume towards the east, reaching 2 km high.
Summary of the last 24 h.: the seismic activity at Popocatépetl volcano remain high. The monitoring sytem recorded 10 h. 30 min of segments of spasmodic tremor and exhalation sequences. Aditionally a volcanotectonic event was registered yesterday at 18:50 h. (local time). Most of the exhalations were accompanied by the emission of incandescent fragments over the flanks of the volcano. The gas and ash plume was continuous, reaching between 1 an 2 km, and travelling mainly to the east. Likeky, small amounts of ash were deposited in San Nicolás de los Ranchos, Santiago Xalizintla, Tianguismanalco, Atlixco, Cholula y Puebla.
The traffic light alert signal remains in Yellow Phase 3. This level implies:
1. Announcing the situation and measures taken to the public and the media.2. Prepare personnel, equipment and evacuation shelters. 3. Implement specific measures in the most vulnerable.4. Implement preventive measures against ash fall, lahars and against fragments in vulnerable regions.5. Alert air navigation systems.6. Limit access to the volcano over a larger area.
Popocatepetl Volcano is monitored continuously. The next report will be edited today at 20:00 h (local time).