Kp-Index
Measures geomagnetic activity on a scale of 0 to 9. Higher values indicate Earth's magnetic field is being shaken by solar wind.
Measures geomagnetic activity on a scale of 0 to 9. Higher values indicate Earth's magnetic field is being shaken by solar wind.
Current Kp index
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Solar Wind Speed
Velocity of particles leaving the Sun. Fast winds (500+ km/s) act like a blower that lights up the aurora.
Velocity of particles leaving the Sun. Fast winds (500+ km/s) act like a blower that lights up the aurora.
Solar Wind Speed ... (click the card for animation)
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IMF Bz (The Door)
A negative (South) Bz "opens the door" for energy to enter our atmosphere.
A negative (South) Bz "opens the door" for energy to enter our atmosphere.
IMF Bz
-- nT
Direction
Proton Density
High density means more particles are hitting the atmosphere, making the aurora brighter.
High density means more particles are hitting the atmosphere, making the aurora brighter.
Density
-- p/cm³
Particle Density
HPI (Power GW)
Real-time estimate of total energy entering the atmosphere. Higher GW = bigger aurora.
Real-time estimate of total energy entering the atmosphere. Higher GW = bigger aurora.
Power (HPI)
-- GW
Total Energy
Radio Flux (F10.7)
Indicates overall solar activity. High numbers mean more solar storms.
Indicates overall solar activity. High numbers mean more solar storms.
Radio Flux
-- sfu
Solar Health
3-Day Kp Index Forecast
Kp 0-4
G1 (Kp 5)
G2 (Kp 6)
G3 (Kp 7)
G4 (Kp 8)
G5 (Kp 9)
Satellite Map (North)
Data Attribution
Where our space weather data comes from
The NOAA Space Weather Prediction Center (SWPC) is the United States government agency responsible for monitoring and forecasting space weather. SWPC provides alerts, warnings, and observational data to protect life and property and to support operations in space and on Earth that can be affected by solar activity.
Learn more on the official SWPC site: https://www.swpc.noaa.gov/
Licensing & credits
Data and model output are provided by NOAA SWPC. Please follow SWPC's terms of use and citations when republishing their data. For official policy and citation guidance see SWPC's website.