File:Volcanic Eruption at the Krýsuvík-Trölladyngja volcanic system, Iceland.jpg

English: This image, acquired by one of the Copernicus Sentinel-2 satellites on 23 March 2021, shows the volcanic eruption ongoing in Iceland’s Reykjanes peninsula. Six hundred eighty-one years after its last eruption, the Krýsuvík-Trölladyngja volcano complex entered into an active phase in the evening hours of Friday 19 March 2021. More than 50,000 earthquakes had been recorded in the area since 24 February 2021 and experts had been anticipating a possible eruption. While the region’s skies are cloudy most of the time in this season, the European Union’s Copernicus Sentinel-2 satellite has taken advantage of a break in the weather to capture its first high-definition image of the area where the eruption is taking place. The data from its near-infrared sensors show that, at least for the moment, the eruptive vent is of small dimensions. The Copernicus Sentinel-2 mission consists of twin satellites, Sentinel-2A and Sentinel-2B, equipped with a high-resolution optical sensor operating in 13 spectral bands. These multispectral data enable the monitoring of volcanoes and their eruptive activity.