Fig. 1From: Characteristics and longitudinal extent of VLF quasi-periodic emissions using multi-point ground-based observationsVLF receivers and magnetometer locations. Locations of all the VLF receivers (magenta triangles) and the magnetometers (blue circles) used in this study. Top shows the location of the stations in geographic coordinates, and bottom gives the geographic and geomagnetic coordinates of the stations, as well as the L-shells of the VLF receivers (using IGRF-13)Back to article page