kp 0.67 (below storm level) at 2026-09-16T18:00:00Z
noaa-scales-now R0 none S0 none G0 none
solar-wind speed 503.7 km/s, density 4.66 p/cm3 at 2026-09-16T21:02:00Z (SOLAR1)
imf bt 5.29 nT, bz(gsm) 2.62 nT at 2026-09-16T21:05:00Z
latest-flare max B3.4 at 2026-09-16T11:53:00Z (current X-ray level B2.4)
# type: reference-data
# source: NOAA Space Weather Prediction Center
# as-of: retrieved 2026-09-16T21:09:13Z
# note: Kp is a 3-hour planetary index 0-9; G1 storm starts at Kp 5
# note: bz negative for hours favours geomagnetic storms
# license: https://www.weather.gov/disclaimer