Solar Activity Monitor

Kp-indices of 5 or greater indicate storm-level geomagnetic activity. Geomagnetic storms have been associated with satellite surface charging and increased atmospheric drag.
The Satellite Environment plot combines satellite and ground-based data as an overview of the current satellite envionment, particularly at geosynchronous altitude. Although these data are of interest to the satellite community, they do not include all parameters and energy ranges known to be associated with satellite anomalies.

Source: http://www.swpc.noaa.gov/rt_plots/satenv.html