Professor of Mathematics

Paata Ivanisvili

pivanisv@uci.edu · x.com/PI010101

Department of Mathematics, University of California, Irvine

Paata Ivanisvili

← Possible new impact sites on Mars

Candidate 2: Plains near Phlegra Dorsa, eastern Elysium

Promising · roughly 60%

Four CTX images of the same 2 by 2 km patch near Phlegra Dorsa, from April 2018 to May 2026. An arrow points to a compact dark spot that is present only in the May 2026 image.
The same 2 × 2 km patch in April 2018, August 2020, June 2022 and May 2026 (north up, same scale and contrast). The arrow marks the spot that appears in 2026. NASA/JPL-Caltech/MSSS.

What changed. A compact dark spot about 70 m across appears in the May 2026 image. It is absent in the earlier images, three of which have nearly the same sun angle as the 2026 image, so it is not a shadow.

Why it may be a new impact. A known cluster of new craters lies about 10 km away, but that cluster formed in 2016–2018, and this spot is still absent in the 2018–2022 images, so it is a separate, later event.

Location
24.886° N, 161.419° E
Absent
24 November 2016, 5 April 2018, 13 August 2020 and 22 June 2022
Present
11 May 2026 (image W10_092765_2031)
Size
Compact dark spot about 70 m across
Confidence
Promising, roughly 60% that it is a new impact.
Caveat
The spot is fainter than candidate 1, the earlier images are noisy, and only one image shows it. No HiRISE footprint covers it; the nearest is 6 km away. Like every candidate here, it is unconfirmed: see the caveat.
A 12 by 12 km CTX view from May 2026 around the Phlegra Dorsa spot, with a dashed box around the 2 by 2 km patch.
A 12 × 12 km view from the May 2026 image. The dashed box is the 2 × 2 km patch. NASA/JPL-Caltech/MSSS.

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