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Popocatépetl volcano (Mexico): observation flight to measure crater dimensions

Sat, 6 Nov 2021, 23:48
23:48 PM | BY: MARTIN
The crater view from helicopter on 5 Nov (image: CENAPRED)
The crater view from helicopter on 5 Nov (image: CENAPRED)
Gas and ash emissions from Popocatépetl volcano, the image taken during the overflight (image: CENAPRED)
Gas and ash emissions from Popocatépetl volcano, the image taken during the overflight (image: CENAPRED)
On 5 November, the Geología de la Universidad Nacional Autónoma de México (UNAM) in collaboration with the local observatory CENAPRED did an observation flight to measure the inner summit crater dimensions.
It revealed its depth of between 160 and 200 meters and diameter of 380 to 400 meters. Presence of a new lava batch was not confirmed.
Based on the parameters, it indicates continuing ash emissions in the near future.
The alert level for the volcano remains at "yellow".
The explosive eruption of the volcano continues dominated by near-constant ash emissions to an altitude of 19,000 ft (5,800 m).
19 emissions of water vapor, gases and small amounts of ash occurred.
The seismic station recorded 34 minutes of low amplitude volcanic tremor and quakes with magnitude M 1.6 and 2.1.
Source: Centro Nacional de Prevención de Desastres volcano activity update 6 November 2021

Previous news

Background:

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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Source: GVP, Smithsonian Institution - Popocatepetl information


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