The Halo CME Event Of 23 October 1997 - Low-Frequency Radio Observations Of The Pre-Event Corona

Abstract

We report low-frequency observations of an enhancement in the solar corona prior to the halo coronal mass ejection of 23 October 1997, with the Gauribidanur radioheliograph. The Sun was `quiet' and no radio bursts were observed either prior to or in the aftermath of the event. The radio method would be useful in studying the pre-event structures associated with the eruptive solar activity, particularly from the ground.