Electric and magnetic field data measured by the electron beam experiment and the magnetometer on board the geostationary satellite GEOS 2 were used to investigate wave Poynting vectors associated with long-period (150--600 s) magnetospheric pulsations. A total of 3580 vectors were calculated for pulsations occurring during 186 days in the dayside magnetosphere. The ratio between the electric and magnetic field wave amplitudes was in general well above the local Alfv¿n speed and was found to increase with increasing wave frequency. The fraction of electric field pulsations for which magnetic wave components could also be identified was therefore larger for the low- and smaller for the high-frequency events in the range 1.67--6.67 mHz. Poynting fluxes were found to have values between 1010 and 10-5 W/m2. For most pulsations with periods between 400 and 600 s the part of the vectors perpendicular to the ambient magnetic field had an inward component and was directed toward the nose of the magnetosphere in the prenoon and afternoon sectors. The behavior of the corresponding components of the pulsations with a 150- to 300-s period was not as clear. For all events observed in the winter season (between November 1, 1978, and February 28, 1979), 59% of the vectors had a field-aligned component directed into the northern hemisphere, whereas 41% of the vectors were directed southward. The frequency dependence of the E/B ratio, the magnitudes of the Poynting vectors, and their directional distributions are consistent for most events with the picture of standing shear Alfv¿n waves caused by solar wind driven surface waves on the outer boundaries of the magnetosphere.