Mars Exploration   Space Exploration & Science Missions  

A recurring 1,800-kilometer cloud forms each Martian summer near Arsia Mons

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A long, narrow white cloud appears west of the 20-kilometer-high extinct volcano Arsia Mons every day during the Martian summer. It stretches about 1,800 kilometers, dissipates within hours and returns the next morning, a pattern that may challenge conventional explanations of cloud formation.

Discovered 2026-10-21T04:35:03.016409-07:00 | 2026-10-21T04:35:03.016409-07:00

Briefing

What Hype is tracking

  • The cloud’s daily, seasonal appearance and rapid dissipation make it a distinctive atmospheric phenomenon for Mars research.
  • Its reported scale—about 1,800 kilometers long—highlights the need to understand how local topography and Martian atmospheric conditions shape cloud formation.

Reported By

Universe Today
Sources Tracked
1
First Seen
2026-10-21T04:35:03.016409-07:00
Latest Update
2026-10-21T04:35:03.016409-07:00
Coverage
Space

Sources

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