Global Geomagnetic Observatory Data from the British Geological Survey

This dataset contains geomagnetic activity indices held by the British Geological Survey. The dataset has global coverage and is currently active, being updated as records are obtained. The database is stored on-line on a VAX system, with an on-line search mechanism available; printed data compilations are also available. The database is open to all users, but with some restrictions. Fees are charged for the use.