The Sun emits the all the known radio wave of communication range (U/VHF) that we use every day in a radio, TV, beeper, and mobile phone.
Radio noise enhances with the activity of the Sun, its intensity at solar maximum is about 7 times powerful than solar minimum, and also the solar radio burst that occurs during the process of the rapid variation of the Sun’s activity (Flare) is about 1000 times powerful than the emitted radio wave during solar minimum.
Especially, monitoring and researching the solar radio burst, in the same manner the x-ray and shock wave, proton and charged particles, are important for predicting and analyzing the cause of the space weather variation.
The solar radio burst follows within a few minutes after the flare occurs, and is classified by its spectral type and spectral structure, and duration into 5 big types by table below.
Radio Burst Radio Burst Type Characteristics Related Events Type I Short narrow band events that usually occur in great numbers together with a broader band continuum. Eruptive Prominence.
Type II Eruptive Prominence.
Coronal shock waves.
Type III Rapidly drift from high to low frequencies.
May exhibit harmonics.
Often accompany the flash phase of large flares.
Solar Flares. Type IV Flare-related broad-band continua Solar plasmoids Type V Broad-band continua which may appear with Type III bursts.
Last 1 or 2 minutes, which duration increasing as frequency decreases.
High speed electron beams