Localization of Sources of Two Types of Continuum Radiation

According to measurements of the electric component of the electromagnetic field in the frequency range from 2 kHz to 10 MHz by the Japanese ERG satellite, generation regions of kilometric continuum radiation and new hectometric continuum radiation have been determined. It is demonstrated that the kilometric continuum is mainly observed on the dayside of the magnetosphere, its source is located near the geomagnetic equatorial plane, and the size of the source does not exceed ±(0.1–0.3) R E across this plane, where R E is the Earth radius. Hectometric radiation mainly observed in the nightside magnetosphere has two sources. One of them is located near the plasmasphere and its distance from the geomagnetic equator can reach 3 R E . The second source is observed near the Earth at distances from 1.1 R E to 2 R E .