Chertok I.M., Fomichev
V.V., Gorgutsa R.V., and Sobolev D.E.
IZMIRAN, Troitsk, Moscow Region, 142190, Russia
We consider the event
of 17 September 2001, 08:20–08:50 UT registered with the IZMIRAN digital
radio spectrograph in the range of 25–270 MHz. Besides a group of type
III burst and usual type II burst, another harmonical type II burst was
observed. The frequency drift velocity of the latter was about 5 times
larger than that of the first type II burst. It is argued that such unusual
fast drift of the radio emission was caused by a peculiarity of the accompanied
coronal mass ejection (CME): the brightest southeastern sector of the CME
front had an inclined, flat shape and propagated on a large angle relative
to the radial direction.
4. Fixed-Frequencu Plots
5. Dynamic Spectrum
6. Coronal Mass Ejection