NOAA News Online (Story 2499)
Sept. 7, 2005 — Forecasters at the NOAA Space Environment Center in Boulder, Colo., Wednesday observed one of the largest solar flares on record at 1:40 p.m. EDT. The forecasters are predicting significant solar eruptions in the coming days. Agencies impacted by space weather storms may experience disruptions over the next two weeks. These include spacecraft operations, electric power systems, high frequency communications and low-frequency navigation systems.
Don't worry about solar activity though... There's, apparently, no link between the suns activity and the Earth's weather and climate.