Space Weather
Space weather describes the dynamic conditions in the near-Earth space environment driven by solar activity. Solar flares and coronal mass ejections can disrupt satellite electronics, degrade communications links, increase orbital drag, and even induce currents in power grids on the ground. Monitoring and forecasting space weather is essential for protecting both space assets and terrestrial infrastructure.
Terms in this Category
Space Weather
Conditions in the near-Earth space environment, including geomagnetic and solar activity, that can affect spacecraft and communications.
Kp Index
A planetary geomagnetic activity index used to summarize global magnetic disturbance levels.
Solar Flare
A sudden, intense burst of electromagnetic radiation from the Sun's surface, typically associated with active sunspot regions and magnetic reconnection events.
Coronal Mass Ejection (CME)
A large-scale expulsion of plasma and magnetic field from the Sun's corona that travels through interplanetary space and can interact with Earth's magnetosphere.
Frequently Asked Questions
How does space weather affect satellites?
Solar flares can cause electronic upsets and radio blackouts. CMEs increase atmospheric drag on LEO satellites and can damage solar panels.
Can space weather be predicted?
Partially. NOAA's Space Weather Prediction Center monitors the Sun and provides forecasts. CMEs can be predicted 1-4 days before arrival.