Archive · 2 Feb 2026
Frost Found at Mars Equator
Scientists were surprised to find frost at the equator of Mars, where it was thought impossible due to high temperatures.
This frost, thinner than a human hair, appears for a few hours around sunrise and disappears as the sun rises.
It was found on top of huge volcanoes in a region called Tharsis.
The frost forms because of special conditions created by the volcanoes, which trap cold air and allow the frost to form.
This discovery shows that Mars has unique processes that allow frost to exist in unexpected places.
Water frost discovered at Mars' equator, a region previously thought too warm for frost.
Frost is thinner than a human hair and appears only for a few hours around sunrise.
Found in the Tharsis region, home to massive volcanoes including Olympus Mons.
Frost forms due to unique microclimates created by the volcanoes' summit hollows.
Total water content of the frost could fill around 60 Olympic-sized swimming pools.
- Who
- Scientists from the European Space Agency
- What
- Discovered water frost at Mars' equator
- When
- 2024
- Where
- Tharsis region, Mars
- Why
- Due to unique microclimates and atmospheric conditions
- Location
- Tharsis region, Mars equator
- Frost Thickness
- Thinner than a human hair
- Duration
- A few hours around sunrise
- Water Content
- 60 Olympic-sized swimming pools
- Volcanoes Involved
- Olympus Mons, Arsia Mons, Ascraeus Mons, Ceraunius Tholus
- Spacecraft Used
- ExoMars Trace Gas Orbiter, Mars Express
- Researcher
- Adomas Valantinas
- Principal Investigator
- Nicolas Thomas