Table 2: Main properties of the selected dm radio spikes shorter than 100 ms observed in three events on 11 July 2000. The drifts in frequency were calculated for spikes with inclined dynamic spectra only, vertical spectra were considered as having non-measurable drifts.

	11 July 2000
	12:30:10-13:30:10	14:34:50-14:51:30	14:57:40-15:02:20
No. of spikes	826	237	340
No. spikes <100 ms	808	237	338
Duration (s)
min/max	0.011/0.99	0.012/0.097	0.009/0.085
mean/median (skew.)	0.033/0.027 (1.7)	0.025/0.019 (2.1)	0.022/0.017 (2.5)
Width (MHz):
min/max	3.1/31.4	3.9/25.6	3.1/30.7
mean/median (skew.)	10.1/9.1 (1.1)	13.57/13.4 (0.3)	9.09/8.2 (1.4)
Relative width (%)
min/max	0.22/2.16	0.28/1.77	0.21/2.24
mean/median (skew.)	0.71/0.65 (1.1)	0.96/0.93 (0.3)	0.64/0.57 (1.4)
Negative drifts (MHz/s)
No. spikes	140	32	40
min/max	64/3850	330/2952	254/2622
mean/median (skew.)	1105/799 (0.9)	1467/1512 (0.0)	1160/1058 (0.4)
Positive drifts (MHz/s)
No. spikes	105	36	38
min/max	142/3853	373/5155	144/2423
mean/median (skew.)	1174/966 (1.1)	1695/1680 (1.2)	894/672 (0.9)