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Progress in Earth and Planetary Science
Fig. 7 | Progress in Earth and Planetary Science

Fig. 7

From: Ground subsidence and polygon development due to thermokarst in the Lena-Aldan interfluve, eastern Siberia, revealed by satellite remote sensing data

Fig. 7

a Spatial distribution of inter-annual vertical displacement in the Amga area along the Amga River. A1–A4 denote sites selected for extracting time-series displacement data shown in b. Stars indicate the reference points used to calibrate InSAR phases; b Time-series plots of the four selected sites shown in a; c, d, and e Enlarged view of inter-annual vertical displacement in c Amga, d Pokrovka and e the western part of Bolugur, respectively; f WorldView-2 image captured in 2021 over Amga; g Pleiades-1 image captured in 2013 over Pokrovka; h WorldView-2 image captured in 2017 over the western part of Bolugur, respectively

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