Table 1. Related Solar Event Characteristics Event Flarea CMEb Date Start Time, UT Size Longitude Region Time, UT Speed Width 1 26 Oct 1721 X1.2 W38 10484 1754 1537 171degrees 2 28 Oct 0951 X17 E08 10486 1110 2459 Halo 3 29 Oct 2037 X10 W02 10486 2054 2029 Halo 4 2 Nov 1703 X8.3 W56 10486 1730 2598 Halo 5 4 Nov 1929 X28 W83 10486 1954 2657 Halo aData are from http://www.sec.noaa.gov/Data/index.html. bData are from Gopalswamy et al. [2005].