New VONA issued as plume once again climbs

New VONA issued as plume once again climbs

Red traffic light

The number of earthquakes recorded and felt by the population reduce

Eruptive activity ceases

Data type: Geological report

Groups: Seismic activity – Earthquakes felt – Volcanic tremor – Subsidence – Plume height – Eruption decreases – VONA

Since the last statement, a total of 29 earthquakes have been located on the island of La Palma, two of them felt by the population. The maximum recorded magnitude is 4.0 (mbLg), corresponding to yesterday’s earthquake at 13:29 UTC which was 14 km deep and felt with maximum intensity IV. Seismicity continues under the central area of Cumbre Vieja in the same areas of previous days, most of the earthquakes (20) are located at depths between 9 and 22 km, and the rest (9) have been located at depths between 30 and 40 km. No earthquakes have been located at depths less than 9 km.
The amplitude of the volcanic tremor signal remains at low levels and is just as stable as in previous days. As in previous days, the island’s network of permanent GNSS stations does not show a clear trend in the deformation of the stations closest to the eruptive centers. In the rest of the stations, the slight deflation possibly related to deep seismicity has stabilized, except in LP01, which continues to register it. Yesterday at 14:20 UTC, due to the significant increase in the height of the eruptive column, the IGN issued a new VONA. Using a calibrated image IGN estimated that at 08:45 UTC today, a column height of 3,700 masl with a south-southeast direction (IGN, 2021). During 8th December activity at several vents in the central and SE part of the main cone was low, with only sporadic pulses of Strombolian activity and ash emissions (GVP, 2021).

This video taken on the 8th of December shows the state of the cone, currently, there are no emissions of lava or ash plumes, but steam escapes cracks in the slopes of the volcano. Sourced from IGME (2021).

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