Popocatepetl volcano news & eruption update
Popocatépetl volcano (Mexico): frequent explosions and ash emissions, plumes up to 3-4 km high (22-28 Nov 2017 activity summary)
The activity at the volcano remains comparably elevated as the following summary from the Smithsonian / USGS Weekly Volcanic Activity Report 22-28 November 2017 shows:
"Each day during 22-28 November CENAPRED reported 188-725 emissions and as many as five explosions. Two explosions on 23 November produced minor ashfall in the municipalities of Huaquechula (30 km SSW), Tepeojuma (39 km SE), Atlixco (23 km SE), and Izúcar de Matamoros (50 km SSE), in the state of Puebla.
After one explosion (at 14:13) there was a 90-minute period of emissions. After an explosion at 05:12 on 24 November (the second of five recorded that day) a 108-minute-period of emissions was recorded. Minor amounts of ash fell in Atlixco.
Almost two hours of continuous emissions of gas, steam, and ash began at 17:11, producing a plume that rose as high as 4 km above the crater rim and drifted SSE. Ashfall was reported in San Pedro Benito Juárez (10-12 km SE) and Atlixco, in the state of Puebla.
An explosion at 22:52 ejected incandescent fragments as far as 1 km from the crater. An ash plume rose 2.5 km and drifted SSE.
Two periods of emissions were recorded on 25 November, at 11:10 (lasting 132 minutes) and 19:29 (lasting 35 minutes). During an overflight that day observers noted that recent explosive activity had increased the dimensions of the internal crater (the crater on the main crater floor) to 370 m in diameter and 110 m deep.
A 121-minute-long period of emissions began at 15:29 on 27 November, with plumes rising at least 3 km and drifting SSE. The Alert Level remained at Yellow, Phase Two."
Volcán Popocatépetl, whose name is the Aztec word for smoking mountain, towers to 5426 m 70 km SE of Mexico City to form North America's 2nd-highest volcano. The glacier-clad stratovolcano contains a steep-walled, 250-450 m deep crater. The generally symmetrical volcano is modified by the sharp-peaked Ventorrillo on the NW, a remnant of an earlier volcano.
At least three previous major cones were destroyed by gravitational failure during the Pleistocene, producing massive debris-avalanche deposits covering broad areas south of the volcano. The modern volcano was constructed to the south of the late-Pleistocene to Holocene El Fraile cone. Three major plinian eruptions, the most recent of which took place about 800 AD, have occurred from Popocatépetl since the mid Holocene, accompanied by pyroclastic flows and voluminous lahars that swept basins below the volcano. Frequent historical eruptions, first recorded in Aztec codices, have occurred since precolumbian time.