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Table 1

Average parameters of individual spikes, drifting chains, and spikes, with the last column referring to the 2003 April 21 event.

Parameter Individual Direct Reverse Event of
Chains Columns Chains Columns 2003-21-04

Number of events 11 579 63 5 5 9
Duration (s) 0.1 5.8 0.04 1.29 0.05 0.048
Bandwidth (MHz) 7.8 24.6 21.0 7.4 24.9 7.7
Relative bandwidth 0.02 0.070 0.054 0.019 0.066 0.021
Drift rate (MHz/s, 295 spikes) − 390, 506 6.8 1260 8.1 517 − 1800
Log drift rate (s-1) − 1.12, 1.43 0.019 3.25 0.021 1.36 − 4

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