The occurence of L dependent peaks in the energy spectra of quasi-trapped (>130keV) precipitating from the inner radiation zone has been previously reported (Imhof et al.. 1973) and interpreted in terms of the cyclotron resonance interaction of electrons with waves of a nearly constant frequency over the L range (~1.4to~1.8) of concern. From satellite data taken in 1971-1972 the longitude variations in the intensities of these peaks obsered ~800-km altitude have been studied in order to establish the spatial extent of the responsible mechanism(s). The data acquired over three different longitude intervals show an increase in the frequency of occurrence of the peaked spectra with increasing longitude east of the South Atlantic anomaly. The distribution in equivalent wave frequencies responsible for formation of the peaks is observed to be nearly the same for the three longitude intervals. These two facts suggest that a similar energy selective precipation mechanism occurs over a broad range of longitudes. It is difficult to unfold uniquely the dependences of the phenomena upon other geophysical parameters from a data set of limited time duration, but certain trends are indicated. L dependent peaks were more prominent in the hours near dawn and dusk than near midnight. This temporal behavior had little dependence on the Kp value. No significant changes with the local time of observation or with the level of geomagnetic activity were observed in the average peak energy at a given L value. Long-term variations in the pak energies were observed, consistent with a seasonal dependence in the plasma electron density.