Report on Popocatepetl (Mexico) — 6 April-12 April 2016
Smithsonian / US Geological Survey Weekly Volcanic Activity Report,
6 April-12 April 2016
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2016. Report on Popocatepetl (Mexico). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 6 April-12 April 2016. Smithsonian Institution and US Geological Survey.
19.023°N, 98.622°W; summit elev. 5393 m
All times are local (unless otherwise noted)
During 6-12 April there were 38-136 emissions from Popocatépetl and as many as six explosions detected daily; some emissions corresponded with increased crater incandescence. Periods of low-amplitude harmonic tremor were detected during 6-8 April. An explosion at 0111 on 9 April produced a gas-and-ash plume that rose 1.5 km above the crater and drifted NE, and ejected incandescent fragments 300 m away onto the E flank. The Alert Level remained at Yellow, Phase Two.
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.