30 Dec The partial collapse of the NW flank on the main cone
The partial collapse of the NW flank on the main cone
Red traffic light
Increased number of seismic events and the largest seismic events recorded.
Increased strombolian activity
Since the last statement, 134 earthquakes have been located in the area, 18 felt by the population. The maximum magnitude was 4.3 mbLg in the earthquake at 7:28 (UTC) today, with a hypocentre depth of 36 km. 12 earthquakes have been located at a depth of around 30 km, the rest of the hypocenters of the period were located at a shallower depth, around 12 km. The volcanic tremor signal maintains a high mean amplitude, with no intensification pulses. Yesterday at 11:20 UTC, due to the decrease in the height of the volcanic ash cloud, the IGN issued a new VONA (Volcano Observatory Notice for Aviation) communicating that the maximum height of the cloud was 3500 m above the level. The island’s network of permanent GNSS stations still does not show a clear trend in the deformation of the stations closest to the eruptive centers. On the other hand, in the stations further away, a slight deflation is maintained, possibly related to deep seismicity. In the results obtained using InSAR (Interferometric Synthetic Aperture Radar), no significant variation was observed between the Sentinel1 images from October 16 and 22 (IGN, 2021). The partial collapse of the NW flank on the main cone caused blocks to fall into a vent, produced numerous lava flows, intensified ash emissions (GVP, 2021).