Decameter Wavelength Observations of an Absorption Burst from the Sun and Its Association with an X2.0/3B Flare and the Onset of a “Halo” Coronal Mass Ejection

Abstract

We report a transient intensity reduction/absorption burst observed at decameter wavelengths in close temporal association with an X2.0/3B flare near the disk center and the onset of a "halo" coronal mass ejection. The observed bandwidth of the burst was about 10 MHz. The size of the absorption region was estimated to be ≈28,000 km.