18-Jan-2023: Indian Institute of Geomagnetism (IIG) has found evidence of "solitary waves" in Mars
Discovered by Indian Institute of Geomagnetism (IIG) an autonomous institute of the Department of Science and Technology (DST). Evidence was found using high-resolution electric field data from NASA's MAVEN spacecraft.
First time discovery of solitary waves in Martian magnetosphere
Key Highlights of Discovery
- Mars does not have intrinsic magnetic field
- High-speed solar wind interacts directly with Mars atmosphere
- Occurrences of solitary waves in weak and thin Martian magnetosphere
- Found mostly in morning and evening at altitudes of 1000-3500 km
- Exact cause still unknown
Solitary Waves
- Distinct electric field fluctuations(Bipolar or monopolar) with constant amplitude-phase relations.
- Shape and size less affected during propagation
Significance
1. Play significant role in dynamics of physical systems
2. Responsible for energization and transport of plasma particles in Earth's magnetosphere
- Affect behavior of satellites and other space-borne equipment
3. Significance in Martian magnetosphere not fully understood
- May play role in loss of atmospheric ions on Mars.