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Essential solar information for three INTEGRAL/SREM SEP events (I9–I11) detected in 2005 January. (a) 20-minute running average of the INTEGRAL/SREM flux timeseries between 2005 DOY 10 and 20 (January 10–20). (b) The respective GOES 1–8 Å solar flux, indicating a number of major (>M-class) solar flares. The time interval between the onset and the peak of the three SEP events is indicated by the green-shaded areas. The blue vertical lines correspond to the times of first detection of CMEs with linear speeds >400 km/s, taken by the SOHO/LASCO CME database. (c) WIND/WAVES time-frequency spectrum for the same time period. Notice the detection of several enhanced (Types II and III) radio bursts (the most significant of them indicated by arrows) and, in particular, a strong type II burst (second from right arrow) that coincides with a X2.6 eruptive flare associated with a ultra fast (2596–2861 km/s) halo CME. The I10 SEP event can only be associated with this activity.

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