From: Estimating ionospheric currents by inversion from ground-based geomagnetic data and calculating geoelectric fields for studies of geomagnetically induced currents
Layers
Depth (km)
Conductivity (mS/m)
Place
Layer 1
0.1
20.00
Addis Ababa, Ethiopia
Layer 2
8.0
0.02
Layer 3
31.0
5.00
Layer 4
100.0
10.00
Layer 5
600.0
1.0
Global (Swarm)
Layer 6
900.0
5.2
Layer 7
1250.0
2700
Layer 8
∞
3750