New episode of lava fountaining and powerful explosions at Etna's SE crater

New episode of lava fountaining and powerful explosions at Etna's SE crater

After an interval of relative quiescence of 16 days, Etna's New Southeast Crater (NSEC) has produced a new episode of lava fountaining (paroxysm) on the morning of November 11, 2013.

The culminating phase, with lava fountains, ash emission and lava flows, started about 04:00 UTC, after about 10 hours of gradually intensifying strombolian activity.

Rather inclement weather conditions precluded any visual observation of the activity, which was accompanied by a strong increase in the volcanic tremor amplitude, and the superficialization and shifting of the volcanic tremor source from a position below the Northeast Crater toward the NSEC.

Volcanic tremor (ESLN) station. Image credit: INGV Sezione di Catania

The phase of maximum intensity of the activity lasted about 7.5 hours, ending around 10:30 UTC; the cessation of lava fountaining was followed by a long series of powerful explosions that generated loud bangs heard mostly in the northern sector of the volcano. 

Ash and lapilli falls were reported east and northeast of the volcano. A voluminous lava flow expanded from the NSEC toward south, and two smaller lava flows were emitted toward east-southeast and northeast.

Source: INGV Sezione di Catania

Featured image: INGV webcam (Montagnola thermal image). November 11, 2013 @ 18:25 UTC

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Tags: etna

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