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| physical phenomena > event > celestial event > periodic celestial event > Forbush decrease | 
| Forbush decrease comparison table | |||||||
| Subject | has discoverer | has discovery date | has definition | occurs on | is a kind of | is an instance of | has period | 
|---|---|---|---|---|---|---|---|
| periodic celestial event | Celestial event which occurs with a very regular period | celestial event | |||||
| solar event | Sun | celestial event | |||||
| Forbush decrease | Forbush | 1954 | A decrease in cosmic-ray intensity during active Sun. | Sun | solar event | 11 years | 
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