The sun is a fusion bomb we orbit on purpose. When it sneezes, the grid catches the cold — and the horde doesn't need electricity.
The sun naps. The horde does not.
GOES long-band X-ray flux, log scale. Horizontal bands mark flare classes: crossing into M or X is when things get interesting. Latest flare: C1.7
Planetary Kp index in 3-hour blocks. 5+ is a geomagnetic storm; the hatched bars are NOAA's forecast.
Data: NOAA Space Weather Prediction Center (swpc.noaa.gov), updated continuously. Flare classes: A < B < C < M < X, each 10× stronger than the last. Prepare for grid-down days at the Survival Kit.