Abstract
Abstract. We studied the association between SEP events during 1977-2003 and related CMEs and found each GLE event was associated with a primary CME, which was faster (average speed ∼1762 km · s−1) and wider (average angle width of 317) than an average CME . All SEP-related CMEs distributed within solar source regions of latitude strip of S30-N40, while 11 (85%)GLE-related CMEs originated from the western hemisphere. These fast halo CMEs (75% full-halo and 25% partial-halo) were associated with type II radio bursts in the decameter hectometer (DH) wavelengths.
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