Report on Popocatepetl (Mexico) — 14 March-20 March 2012
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 14 March-20 March 2012
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2012. Report on Popocatepetl (Mexico) (Sennert, S, ed.). Weekly Volcanic Activity Report, 14 March-20 March 2012. Smithsonian Institution and US Geological Survey.
Popocatepetl
Mexico
19.023°N, 98.622°W; summit elev. 5393 m
All times are local (unless otherwise noted)
CENAPRED reported that during 14-20 March steam-and-gas emissions rose from Popocatépetl and incandescence from the crater was observed at night. Emissions contained small amounts of ash on 14 March. On 18 March emissions again contained a small amount of ash and were accompanied by increased incandescence from the crater.
Geological Summary. 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.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)