Note: This event was so large that two of the ACE instruments supplying real-time data (SWEPAM and SIS) became saturated. This made invalid the solar wind speed, solar wind density, and high-energy proton real-time data from these instruments, for periods of time during the event. Therefore the groups who use these data data as inputs for their forecasting models were unable to make valid space weather predictions for the event.

The MAG and EPAM instruments on ACE worked fine throughout the event.

ACE Real-Time Solar Wind (RTSW) Data from NOAA's Space Environment Center (SEC) provides up to an hour's advance warning of unusual solar activity, such as solar flares and coronal mass ejections, which can cause geomagnetic storms. ACE Browse data, supplied by the ACE Science Center, is a superset of the RTSW data, generally available several days later.

SpaceWeather Bureau Science news and information about the Sun-Earth environment.