The five main classes of SRBs which originate in the same of the solar atmosphere that are associated with geo-effective disturbances known as space weather (White, 2007; Yue et al., 2013).
|SRB||Description of spectrum||Duration||Frequency range||Associated origin mechanism|
|Type I||Short duration enhancements of narrow bandwidth usually appearing in groups.||A few seconds||80–200 MHz||Active regions|
|Type II||Slow drift towards lower frequencies over the duration of the burst. Often accompanied by a harmonic.||3–30 min||20–150 MHz||MHD shocks|
|Proton emission events|
|Type III||Short duration. Quickest frequency drift rate of all metric radio bursts (White, 2007)||1–3 s||10 kHz–1 GHz||Active regions|
|Type IV||Moving||30 min – 2 h||20–400 MHz||Flares, proton emissions|
|Stationary||Hours – days||20 MHz–2 GHz||Eruptive prominences|
|Continuum||3–45 min||25–200 MHz||Flares, proton emissions|
|Type V||Always observed trailing a Type III burst.||1–3 min||10–200 MHz||Active regions, Flares|
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