decametre radiation

Decametric radiation refers to radio waves with high frequencies, specifically those with wavelengths between 1 and 10 decameters. This type of radiation was first observed from the planet Jupiter in 1955. These radio emissions, recorded at 22 megahertz, correspond to a wavelength of approximately 13.6 meters or 1.36 decameters.12

Jupiter was the first planet discovered to emit radiation at radio wavelengths. The bursts of decametric radio noise provided the initial evidence for Jupiter's magnetic field. While Jupiter also emits steady radiation at shorter decimeter wavelengths, the decametric radiation is intermittent and significantly influenced by the orbital position of Jupiter's moon, Io.2