Abstract:
We present metric radio observation of a transient. quasi-periodic type IV
burst emission from the solar corona following the hard X-ray/H¦Á flare of
November 23, 2000. The radio event lasted for about 121s, and the measured
mean period was 14.7 ¡À 2.5s. The source region of the observed radio
emission was found to be located at a height of 0.18 ¡À 0.03 Ro above the
solar photosphere. The Alfven speed (V/sub A) at that location was
estimated to be 1185 ¡À 181 kms/sup-1. Combined with the plasma density
corresponding to the observing frequency (109 MHz), this gives a magnetic
field (B) of 7.2 ¡À 1.1 G for the above region. We also estimated the
speed of the disturbance propagating through the solar atmosphere in the
aftermath of the flare, and is ¡Ü 755 kms/sup-1.
