| Observatorio | Ubicación | Altitud |
|---|---|---|
| Martin de Vivies - Amsterdam Island Magnetic Observatory | — | 50 m |
| Port Alfred Magnetic Observatory | — | — |
| Port-aux-Francais Magnetic Observatory | — | — |
| Observatorio | Ubicación | Altitud |
|---|---|---|
| Martin de Vivies - Amsterdam Island Magnetic Observatory | — | 50 m |
| Port Alfred Magnetic Observatory | — | — |
| Port-aux-Francais Magnetic Observatory | — | — |