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Popocatepetl is one of Mexico's most active volcanoes. After almost 50 years of dormancy, "Popo" came back to life in 1994 and has since then been producing powerful explosions at irregular intervals.
In the past centuries befor European invasions, large eruptions produced giant mud flows that have buried Atzteque settlements, even entire pyramids.
Popocatépetl volcano (Mexico): new lava dome growing inside summit crater
Monday Jul 08, 2013 14:56 PM | BY: T
Aerial view of the crater of Popocatepetl on 7 July (CENAPRED)
The large SO2 plume from Popo (NOAA)
Current seismic recording from Popocatépetl
Steam and ash column rising from Popo yesterday
Annotated seismogram during 6-7 July's high tremor phase (CENAPRED)
In the last 7 hours the monitoring system of Popocatepetl registered four hours of low-frequency and low amplitude tremor that was accompanied by
An overflight yesterday showed that the activity of the last few days has formed a new lava dome that has filled the inner crater and reached approximately 250 meters in diameter.
Activity remained elevated (but a bit lower than two days ago) with a near-constant emission of gas, steam and ash, interrupted by some discrete explosions in between.
Additionally, a 1.9 magnitude volcano-tectonic earthquakes was recorded yesterday. Overall, tremor has decreased during the past 24 hours.
Weather did not allow much visual observation of the volcano recently.
The Volcanic Alert Level remains at Yellow, Phase 3.
CENAPRED posted an annotated seismogram showing the high-level tremor phase yesterday - thanks to all CENAPRED staff!
After being a bit calmer during the first half of the day, compared to last night, a strong eruption occurred around 19:00 GMT (10:00 local time) and is probably continuing, judging from the seismic signal. ... [more]
The intensity of the current eruptive phase has been easing a bit during the night. Explosions and gas and ash emissions have become more intermittent, but still produce plumes reaching 3-4 km above the volcano. ... [more]
A phase of strong eruptive activity has started last night and is continuing with frequent explosions that eject incandescent bombs onto the upper outer slope and create a plume of gas and ash rising 3-4 km above the volcano to flight level 250 (25,000 ft). ... [more]
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.
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