Report on Popocatepetl (Mexico) — 6 August-12 August 2014
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 6 August-12 August 2014
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2014. Report on Popocatepetl (Mexico). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 6 August-12 August 2014. Smithsonian Institution and US Geological Survey.
19.023°N, 98.622°W; summit elev. 5393 m
All times are local (unless otherwise noted)
CENAPRED reported that during 6-12 August cloudy conditions with intermittent views showed steam-and-gas emissions with minor ash rose above Popocatépetl’s crater. On 7 August there was an explosion and ash was reported in the area of Paso de Cortés. On 9 August there were 5 explosions and ash columns that rose 1 km above the crater. Slight nighttime incandescence was observed. The Alert Level remained at to Yellow, Phase Two.
Geologic Background. Volcán Popocatépetl, whose name is the Aztec word for smoking mountain, rises 70 km SE of Mexico City to form North America's 2nd-highest volcano. The glacier-clad stratovolcano contains a steep-walled, 400 x 600 m wide 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 to the south. The modern volcano was constructed south of the late-Pleistocene to Holocene El Fraile cone. Three major Plinian eruptions, the most recent of which took place about 800 CE, have occurred 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 Pre-Columbian time.