3-day GOES X-ray Plot

The GOES X-ray Flux plot contains 1 minute averages of solar X-ray output in the 1-8 Angstrom (0.1-0.8 nm) and 0.5-4.0 Angstrom (0.05-0.4 nm) passbands. Data from the SWPC Primary and Secondary GOES X-ray satellites is shown.

Other plots of interest: A black background version of this plot; GOES 1-min X-rays; SWPC Real-time Monitors.

SWPC X-ray alerts are issued at the M5 (5x10E-5 Watts/m2) and X1 (1x10E-4 Watts/m2) levels, based upon 1-minute data. Large X-ray bursts cause short wave fades for HF propagation paths through the sunlit hemisphere. Some large flares are accompanied by strong solar radio bursts that may interfere with satellite downlinks.

This page updates dynamically every 5 minutes.

NOAA / Space Weather Prediction Center