Solar Radio Burst Image Collection

This is a private collection of the solar radio burst dynamic spectra from various sources (papers and observatory web sites).

0. Schematic diagram of solar radio burst classification

1. Type-I

A non-flare-related phenomenon, consisting of a continuum component and a burst component.

2. Type-II

Typically occur at around the time of the soft X-ray peak in a solar flare. Identified by a slow drift to lower frequencies with time in dynamic spectra, the frequent presence of both fundamental and second-harmonic bands (with a frequency ratio of 2), and splitting of each of these bands into two traces.

3. Type-III

Brief radio bursts that drift very rapidly in frequency versus time. Commonly seen in the impulsive phase of solar flares, but can be seen at times when there is no activity at other wavelengths.

4. Type-IV

Broadband quasi-continuum features associated with the decay phase of solar flares (attributed to electrons trapped in the post-flare arcades, etc.)

5. Type-V

Typically appear as the extended phase of a Type III burst.