The Royal Observatory Greenwich was established in 1676 and, from 1839, hosted the specialised magnetic observatory
which made continuous measurements from 1840 onwards.
The distance of each magnetic observatory
from the EQ epicenter is 640 km for MMB, 300 km for KAK, and 1,300 km for KNY, respectively.
In addition we processed data from magnetic observatory
Budkov (1) (again in the same way) to confirm that observed EME activity is not excited by global magnetic field.
For a comparison, the outputs of the home-made sensors were compared against Earth field measurements taken at Chambon la Foret (CLF), a professional magnetic observatory
near Orleans, France, about 300km SSE of the author's location.
SANSA Space Science (formerly Hermanus Magnetic Observatory
) has been operating a pulsation magnetometer from Sutherland for the last ten years.
They are also studying Earth's magnetic field, the ionosphere, and auroras at Iceland's Leirvogur Magnetic Observatory
and other facilities.
The Hermanus Magnetic Observatory
(HMO) will also be transferred from the National Research Foundation to SANSA.