Whether positioned Vertically or Horizontally, the signal pattern of a MagLoop is cylindrical.
A Vertically positioned MagLoop will provide a signal pattern that covers all angles from horizon to horizon in a cylindrical pattern. Some would say this pattern looks like a slinky. This pattern enables NVIS (near vertical incidence skywave) signals to propagate above the antenna, while also transmitting at low take off angles, and all angles in between.
A Horizontally positioned magnetic loop antenna will provide a signal pattern that is omnidirectional and enhances NVIS signal patterns using ground gain to send signals primarily above the antenna. This is represented by the primary image in this article that shows where the signal first hits the ground before being sent skyward.
In free space this pattern would look like a large and ever expanding donut.
Click HERE for MagLoop Antennas