The thermal activity of Etna has been monitored through the processing of a variety of satellite images with different temporal, spatial, and spectral resolutions. The Figure shows the estimates of radiant power of the last 6 months, calculated using FCI, SEVIRI, MODIS, VIIRS, and SLSTR multispectral images.

In the past week, the thermal activity in the summit area was moderate. The maximum thermal flux anomaly is 396.59 MW (SEVIRI), recorded on 2025-12-14 11:12:00 UTC.

The latest thermal flux anomaly (22.88 MW, SEVIRI) was recorded on 2025-12-17 09:42:00 UTC. However, in the past week, poor weather conditions have often affected the analysis of satellite images.