Real time

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 2022-04-30 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-).

Primary (DTU)

K-index calculation algorithms:
IH = Ingemar Häggström method
FMI = Finnish Meteorological Institute method

Secondary (DMI)


Tormestorp magnetometer Lund pages	Pulsation measurements	Kiruna Suspended Magnetometer (Installed in February 2019)	Total field measurements (gsm90 v ? (from 1997))	3d plot magnetic field Kiruna	Lycksele SGU magnetometer Contact SGU regarding Lycksele magnetometer data	ACE magnetometer (data prepared by noaa.gov)

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 2022-05-25 11:08:44.
http://www2.irf.se/maggraphs/rt_iaga_last_hour_1sec.txt gives data in iaga format for the last hour in 1 second resolution. Absolute values are presented based on absolute measurements made until 2022-05-25 11:08:44.
http://www2.irf.se/maggraphs/rt_iaga_last_hour_1sec_dtu.txt gives data in iaga format for the last hour in 1 second resolution from the primary DTU (suspended) magnetometer.
http://www2.irf.se/maggraphs/rt_iaga_last_hour_1min_dtu.txt gives data in iaga format for the last hour in 1 minute resolution from the primary DTU (suspended) magnetometer.

Last day

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_iaga.txt gives data in iaga format for the last day. Absolute values are presented based on absolute measurements made until 2022-05-25 11:08:44.
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 2022-05-25 11:08:44.

Preliminary real time K index last three hours [00:00:00-03:00:00 UTC]: 1
(http://www2.irf.se/maggraphs/preliminary_real_time_k_index)

Constructed by Ingemar Häggström. 5 May 1997
Responsible scientist: Masatoshi Yamauchi (masatoshi.yamauchi*irf.se)
Responsible for web pages: Mats Luspa (matsl*irf.se)