Geomagnetism Data and Reports
A selection of Magnetic Observatory Data and Annual Reports is available here.
Magnetic Observatory Data
- Hourly data has been given priority. Initially 2000 - 2008 hourly data has been loaded, we will work back at least to the start of the data available in digital form.
- Minute data from recent years is available on the Intermagnet CDROM, so loading this will have a lower priority.
- 1 and 5-second data is planned to be made available in the future.
Within these files, H, X, Y, Z and F are measured in nT, while D and I are in minutes of arc. For some years at some stations, the H and Z hourly values were rounded to 1 nT, and the D values to 0.1 minutes, and other values calculated from these rounded values. This is apparent in the tables.
The graph shows a significant differences in the annual field variations at the two Scott Base huts (variomenter and absolute huts). There is a big peak in Z (corrected to the absolute hut values) that is not seen in F (as measured in the variometer hut).