Mount Etna’s height is not a permanent number carved into stone. Eruptions add material, crater walls change and parts of the summit can collapse. A map of an active volcano is therefore a dated description of a moving landscape.
The 2021 measurement that prompted the story
The older article concerned Etna’s Southeast Crater. INGV’s August 10, 2021 announcement reported a height of 3,357 meters above sea level, with an uncertainty of about three meters, after approximately 50 episodes of activity beginning in February. Satellite imagery acquired in July supplied the topographic comparison.
The translated statement quoted in the feature described the change in the summit’s leading crater:
“Thanks to the analysis and processing of satellite images, the southeast crater is now much higher than its 'older brother', the northeast crater, for 40 years the undisputed peak of Etna.”
The institute also placed the Northeast Crater at 3,350 meters in 1981 and 3,326 meters in summer 2018, after changes and collapses. These are historical measurements rather than competing claims about one fixed modern height.
For people below the mountain, ash and noise were part of the same episode. Catania resident Tania Cannizzaro described the view to AFP:
“Depending on the wind, the rumblings of the volcano reach Catania and make the windows shake. But there is also the spectacle, especially in the evening, when you see this red plume that moves.”
Her reaction preserves both the spectacle and the inconvenience. It should not be read as a present-day hazard assessment for nearby towns.
How an eruption changes the summit
Lava and fragmented volcanic material can build cones and raise crater rims. Other activity can remove or redistribute that material. Etna has several summit craters, so even the identity of its highest point can change.
An INGV account of surveys in July 2024 explains how drone observations documented rapid changes around the Voragine crater. Following the July 7 activity, the team measured a summit elevation of 3,369 meters above sea level from the July 8 survey.
Why the measurement needs context
That value belongs to a particular survey, not a guarantee of the volcano’s exact height today. It also uses a sea-level reference. INGV distinguished this from ellipsoidal heights obtained with satellite positioning; mixing the two can produce misleading comparisons.
When an older article announces a “new height record,” ask when it was measured and which crater the number describes. A later survey may supersede it without making the earlier measurement meaningless.
A landscape that needs repeated mapping
The practical lesson extends beyond record keeping. Researchers update topography to understand where material has accumulated and how the surface has changed. A photograph from a distant town may show activity beautifully but cannot replace those measurements.
For a contrasting example, see how the 2022 Tonga eruption removed much of an island. Francisco Negroni’s volcanic photographs show how dramatic these changing environments can look from the ground.
The record has kept moving. In July 2024, after a new eruptive phase, Italian reporting on INGV drone surveys said the Voragine crater had risen 107 metres in a month and become Etna’s highest point at about 3,369 metres, overtaking the Southeast Crater’s 2021 record. Etna’s summit height should therefore always be quoted with a date.
Original feature credits and references: the National Institute for Geophysics and Vulcanology · said in a press release.
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