Follow the geomagnetic development in real time! (NB! Absolute values are shown in the graphs. The data is not yet processed and may contain man-made signals. Real values in processed data (latest processed data 2024-10-31 23:59:59). Solar quiet curves shows the normal or quiet state for the magnetic field when not disturbed by solar storms. The development of quiet curves from 1978 can be seen here: Quiet curves 1978-).
Black version of this page (according to some "aurora hunters" white background makes it difficult to see images (blinds) on the page when out in the field)
Primary
K-index calculation algorithms:
IH = Ingemar Häggström method
FMI = Finnish Meteorological Institute method
Secondary (DMI)
Digital realtime data
Last hour
http://www2.irf.se/maggraphs/rt1hour.txt gives you data for the last hour with times in hours and the three components (XYZ) in nT as preliminary deflections from the expected monthly mean.
http://www2.irf.se/maggraphs/rt_iaga_last_hour.txt gives data in iaga format for the last hour in 1 minute resolution. Absolute values are presented based on absolute measurements made until 2024-11-13 08:50:49.
http://www2.irf.se/maggraphs/rt.txt gives ascii data for the last day in the format "yyyymmddhhmmss X Y Z" in nT as preliminary deflections from the expected monthly mean.
http://www2.irf.se/maggraphs/rt_eda.txt gives ascii variometer data for the last day in the format "yyyymmddhhmmss X Y Z" in nT for the backup (eda) magnetometer.
http://www2.irf.se/maggraphs/rt_iaga.txt gives data in iaga format for the last day. Absolute values are presented based on absolute measurements made until 2024-11-13 08:50:49.
http://www2.irf.se/maggraphs/rt_iaga_1sec.txt gives data in iaga format for the last day. Absolute values are presented based on absolute measurements made until 2024-11-13 08:50:49.
Constructed by Ingemar Häggström. 5 May 1997
Responsible scientist: Masatoshi Yamauchi (masatoshi.yamauchi*irf.se) Responsible for web pages: Mats Luspa (matsl*irf.se)