Scientists analyse images over seven decades.
German and Russian scientists say they have documented the life cycle of a volcano for the first time, revealing that it has a kind of “memory”.
The volcano in question is Bezymianny, an active stratovolcano on the Kamchatka peninsula in eastern Russia which suffered a collapse in its eastern sector back in 1956.
Photographs of helicopter overflights from Soviet times have now been analysed alongside more recent satellite drone data using state-of-the-art methods at the German Research Centre for Geosciences (GFZ) in Potsdam.