The three-dimensional distribution of the nearby galaxies in the Revised Shapley-Ames Catalog is investigated to map the density contrasts in different directions for calculating the expected velocity perturbations due to the north galactic anomaly. It was shown that (1) the known concentration of galaxies in the north galactic atmosphere occurs for all galaxy types and is centered near the core of the Virgo cluster proper, (2) galaxies within the anomaly are concentrated toward the supergalactic plane described by de Vaucouleurs, but the concentration disappears for Virgocentric distances greater than 1000 km/s, and (3) if the total mass-energy density is at least proportional to the galactic density, the gravitational field generated by the north galactic anomaly should pull the Local Group toward Virgo.
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Yahil et al. (1980) studied this question.