On 15 October 1999, charged particle and plasma wave detectors on the Polar satellite observed an enhancement in precipitating energetic electrons coincident with an ELF/VLF electromagnetic emission. Assuming that the electromagnetic wave was field aligned and scattered trapped electrons by first-order cyclotron resonance near the equatorial plane, the resulting pitch angle distribution of precipitating electrons was calculated. For reasonable values of the cold plasma density and the wave intensity at the equatorial plane, the calculated precipitation agrees with measurements for an equatorial interaction region approximately 1000 km in length.