LF hiss was recorded at Frobisher Bay (L=14.6, &Lgr;?75¿) during the 1-year periods October 30, 1971, to November 18, 1972, and June 27, 1974, to June 26, 1975, by using a wide-band receiver covering 0--100 kHz. A sweeping narrow-band recorder produced intensity-modulated frequency-versus-time records which show the spectral and temporal variations of the hiss. The hiss occurs in bursts of approximately 1- to 30-min duration. Nearly all of the bursts have a minimum bandwidth of at least kHz centered in the 20- to 30-kHz range. Many extend upward to 100 kHz, showing increasing intensity with increasing frequency. Few extend downward below 10 kHz, and those that do show decreasing intensity. A single strong diurnal peak of occurrence is found centerd on 21 hours local magnetic line. During the second year a rapid response 30-MHz riometer was operated with the LF hiss recorder, and a direct association of some riometer events with some hiss events was found, the hiss event occurring just before, or just at the onset of, the riometer event. However, strong riometer events with rapid onset can occur with no accompanying hiss, and strong hiss bursts can occur with no accompanying riometer absorption. The results are discussed in the context of other hiss observations on the ground and in the topside ionosphere and thier correlation with fluxes of particle precipitation.