Overview
- Researchers led by Christopher M. Fowler used multiple instruments on NASA’s MAVEN orbiter to identify signatures of the Zwan‑Wolf effect deep in the Martian ionosphere below 200 km.
- The team traced the signal to structures driven by a large solar storm in December 2023 that compressed magnetic flux tubes and redirected charged particles, producing localized plasma-density drops of about 30–40%.
- The result, published in Nature Communications in May 2026, is the first peer-reviewed observation of the Zwan‑Wolf effect operating inside a planetary atmosphere rather than only in a planet’s magnetosphere.
- Near-term in‑situ confirmation is limited because MAVEN has been out of contact since December 2025 and an anomaly review board convened in February 2026 is assessing recovery prospects.
- Scientists say the finding changes how space weather is modeled on unmagnetized bodies and could affect estimates of atmospheric escape, spacecraft risk, and planning for future missions to Mars, Venus, and Titan.