Local geomagnetic activity indices
The local activity indices are defined as absolute mean deviations of the current horizontal component of the geomagnetic field at the location relative to the previous days mean value.
Provision of local geomagnetic indices data for AFFECTS
The local geomagnetic activity indices are generated and provided by University of Tromso for a list of magnetometers. After generation the data is directly transferred to this website and provided here for the AFFECTS consortium members and registered users.
All activity index values are updated hourly, while k index values per definition are 3 hourly.
Monthly Data Base
Historical data base
Additional Magnetometer data is available at University of Tromso:
Use of local geomagnetic indices data in AFFECTS
The local geomagnetic indices are basically used for the monitoring of the auroral geomagnetic activity and for validation of the early warning messages.
Description of application
Validation of Early Warning for GNSS
Please use the login to see more information und products.