Eight aeromagnetic traverses were flown recently across the Red Sea at the latitude of about 21 degrees. The data showed a high-amplitude axial trough anomaly trending northeasterly that terminated near the northern edge of the survey area. A second high-amplitude anomaly was observed to trend northwesterly beginning immediately west of the 1000 m bathymetric contour. Depth estimates to the upper surface of the very magnetic rock units was estimated to be about 2 km. The three deep hot brine areas seemed to be related to the steep gradients of the large axial trough anomaly. A third low-amplitude anomaly trending northwest into the Red Sea from the land area south of Jeddah appeared to have a much deeper source. This anomaly possesses the same trend as numerous dykes, faults, and magnetic trends observed in the Arabian shield rocks.