MAVEN Data Reveals ZwanWolf Effect in Mars Ionosphere

Scientists have discovered a space weather phenomenon, previously thought to exist only within Earth's protective magnetic bubble, occurring deep within the atmosphere of Mars. The finding, made using data from NASA's MAVEN spacecraft, reveals a new and unexpected way the solar wind interacts with the Red Planet.

The phenomenon, known as the ZwanWolf effect, describes how charged particles are squeezed and channeled along magnetic structures. On Earth, this process occurs in the magnetosphere and helps deflect the stream of charged particles from the Sun, known as the solar wind. Mars, however, lacks a global magnetic field like Earth's, leading scientists to assume such large-scale magnetic plasma behavior could not occur in its atmosphere.

The discovery was published in the journal Nature Communications. Lead author Christopher Fowler, a research assistant professor at West Virginia University, said he first noticed unusual fluctuations in magnetic field data while examining measurements from a powerful solar storm that struck Mars in December 2023. After analyzing data from several MAVEN instruments and ruling out other explanations, the team identified the source as the...