Fig. 2: Satellite observations of the inner crater. | Communications Earth & Environment

Fig. 2: Satellite observations of the inner crater.

From: Photogrammetry and analogue experiments in 3D-printed mold applied to the 2022-2023 lava emplacement at Lascar Volcano in Chile

Fig. 2

Two eruptions occurred on 10 December 2022 and 26 January 202377. a−d Orthomosaics (0.5 m/pixel) generated from the Pléiades panchromatic band. Black boxes delineate the areas shown in the zoomed views. b Whitish alteration and sulfur deposits are visible on the crater floor. c Ring-shaped snow patterns on the funnel slope. d Erosional ravines along the funnel slope. The blue circle marks the estimated conduit extent at Lascar31. e−h Point cloud slope maps derived from Pléiades tri-stereo data, emphasizing post-eruptive topographic features. Black regions indicate missing points in the point cloud, corresponding to shadowed areas. f Flow-like surface patterns suggesting effusive extrusion. g Funnel structure on the crater floor. h Funnel structure persisted until the last data acquisition. Orthomosaic and slope maps created using ArcGIS Pro (v3.3).

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