Definitions for "Space weather"
The effects on Earth produced by solar activity which causes changes in energetic particle flux due to magnetic storms from the Sun. More about space weather...
Variability of the near-Earth and interplanetary space environment.
The state of space in the Solar System (the solar wind, Earth's magnetosphere…etc) at a given time and place, with respect to variables such as plasma density and temperature, and magnetic field strength and direction.