Service International des Indices Géomagnétiques
International Service of Geomagnetic Indices

ISGI headquarters are hosted by . They moved from on January 1st, 2015.

Quicklook data

aa, am 

The following quick-look values of aa and am indices are automatically computed and made available about 30 minutes after the end of the corresponding 3-h interval. The minute values are provided by magnetic observatories (Hartland and Canberra) and INTERMAGNET GINs (Geomagnetic Information Nodes) on a 10 minute basis.
These plots are the result of an automatic process. As such, the following plots might be based on wrong data, such as magnetically polluted data, spikes, etc.