Table 1: Basic characteristics of the studied events and of their slowly drifting structures (DS) in the 0.4-2.0 GHz frequency range and hard X-ray source motions.
Event Apr. 4, 2002 May 17, 2002 Aug. 30, 2002
GOES start (UT) 15:24 7:27 12:47
GOES maximum (UT) 15:32 7:54 13:29
GOES end (UT) 15:38 8:40 13:35
GOES class M 6.1 M 1.5 X 1.5
H$\alpha$ start (UT) - - 12:26
H$\alpha$ maximum (UT) - - 13:28
H$\alpha$ end (UT) - - 13:49
H$\alpha$ class - - SN
NOAA active region - - 0095
Location source above limb source above limb N15 E74
Drifting structure      
Start (UT) 15:28:48 7:37 13:27:38
    7:32 (start of 3 GHz burst)  
End (UT) 15:29:20 7:57 13:27:50
Frequency range (GHz) 0.45-1.4 0.8-1.8 0.8-2.0
Global Freq. drift -32 -0.4 -25
(MHz s-1)      
Drift of individual pulses infinite 240-360 infinite
(MHz s-1)      
Instantaneous 200 800 800
bandwidth (MHz)      
X-ray source motion      
Start (UT) 15:28 7:32 13:28
End (UT) >15:38 7:36 >13:33
Velocity direction east source splitting north-east
(km s-1) 12 up to 100 (during the splitting) 10


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