Overview
- NASA highlighted a study in Nature Communications reporting the first confirmed detection of the Zwan‑Wolf effect in Mars’ atmosphere using data from the MAVEN orbiter.
- The Zwan‑Wolf effect squeezes charged particles along magnetic flux tubes, a behavior long seen in Earth’s magnetosphere but not previously in a planetary atmosphere.
- Researchers saw the effect deep in Mars’ ionosphere below about 200 kilometers, where a strong solar storm boosted the signal enough for MAVEN’s instruments to measure it.
- The team first noticed unusual magnetic “wiggles,” then used multiple MAVEN instruments to compare fields and particles and ruled out other causes before identifying the effect.
- The result sharpens models of atmospheric loss and mission hazards at unmagnetized worlds like Mars, Venus, and Titan, and further in‑situ checks hinge on MAVEN’s recovery after its late‑2025 contact loss.