**2. Study area and data**

The study area that was selected for this paper covers the Public Power Corporation (PPC) SA Amyntaio lignite mine. It has an extended mining history

**Figure 1.** *Study area located in Greece (left) and the subset of Sentinel-2A imagery (2020) (right).*

that includes opencast mining with depths that reach 180 m, since the mid-1980s and is considered a critical mine for energy production in Greece. It is located in the north west part of mainland Greece. A subset was extracted from the main scene for analysis in order to include the mining operations as it appears in **Figure 1**, that is presented below.

In this paper Sentinel-2A, Level 2A (Bottom-Of-Atmosphere) corrected reflectance imagery was obtained. The scene acquisition date is 30 June 2020 (Tile T34TEK). The criteria for the selection of scene were limited cloud coverage and high quality.
