Service International des Indices Géomagnétiques
International Service of Geomagnetic Indices

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.

Created with Highcharts 5.0.9Kpa2025-05-132025-05-1400:0003:0006:0009:0012:0015:0018:0021:0000:0003:0006:0009:0012:0015:0018:0021:0000:0002550750369
aa (nT)
Created with Highcharts 5.0.9Kpm2025-05-132025-05-1400:0003:0006:0009:0012:0015:0018:0021:0000:0003:0006:0009:0012:0015:0018:0021:0000:0002040600369
am (nT)