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Abstract

The geomagnetic observatories Tristan da Cunha and St Helena are located on islands in the South Atlantic and in particular Tristan da Cunha is difficult to reach for maintenance and training. Here we describe recent activities at these geomagnetic observatories as well as remote training activities. These remote training activities are based on a detailed analysis of the DI-absolute measurements and involve also newly developed methods to identify potential problems (or potential causes of obvious problems) with the measurements. As new training media we plan to use explainer videos to be published on e.g. Youtube. The absolute measurements at St Helena are of extremely good quality and this allows to identify even tiny problems in the measurements. The absolute measurements at Tristan da Cunha are of acceptable quality, but can certainly be improved. There, to provide redundancy, a group of three new observers was trained by the only remaining previous observer on the island and now requires additional remote training to improve the absolute measurement quality.