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Trace Gas Orbiter detects ground-hugging hydrogen chloride near Mars’ Alba Mons, raising possibility of persistent subsurface ma

Researchers say hydrogen chloride detected near Alba Mons by the Trace Gas Orbiter may be linked to magma beneath the surface. The study also identifies newly recognized fissures that could be a source of the gas, adding evidence that some Martian volcanic systems may remain active or persist underground.

Discovered 2026-11-09T07:35:19.399863-08:00 | 2026-11-09T07:35:19.399863-08:00

Briefing

What Hype is tracking

The HCl detection occurred at a time of year when the researchers say volcanic origins are difficult to rule out, making the observation relevant to assessments of present-day Martian geology.
Newly identified surface fissures offer a possible route for the gas, giving researchers additional features to investigate when evaluating whether magma chambers persist beneath Mars.

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Universe Today astronomy.com