A comparison of pre- and post-eruption optical images shows two distinct new collapse pits, one situated within the crater and the other along its rim. (IMAGE)
Caption
(a) Location of the Erta Ale and Hayli Gubbi volcanoes. The crater’s rims of Erta Ale are outlined by black ticked lines. Topographic contours are shown at 100-m intervals. Inset: Red box indicates the study area. Blue and pink boxes indicate the data coverage of Sentinel-1 and NISAR, respectively. Yellow line denotes the plate boundary [31]. Black arrows represent GPS velocities in the ITRF2014 reference frame [32]. (b-e) Pre-eruption Sentinel-2 optical image zoom in the northern caldera of Erta Ale and Hayli Gubbi. Post-eruption Sentinel-2 and Landsat-9 optical images show surface changes and collapse pits in (c–d) Erta Ale and (f–g) Hayli Gubbi. Red dashed polygons and white dashed lines indicate the newly formed pits and fractures.
Credit
10.1016/j.geog.2026.06.002
Usage Restrictions
Credit must be given to the creator. Only noncommercial uses of the work are permitted.
License
CC BY-NC