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-Description   -Related graphs   -Examples of events   -K-index tables   -Long-term statistics   -Related data and links   -Realtime data

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 2021-09-30 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-).

Last 9 hours Last 24 hours 2021202020192018201720162015201420132012201120102009200820072006200520042003200220012000199919981997199619951994199319921991199019891988198719861985198419831982198119801979197819771976197519741973197219711970 010203040506070809101112 01020304050607080910111213141516171819202122232425262728293031

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) Local aurora index graph

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 2021-10-21 07:29:54.
• 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 2021-10-21 07:29:54.
• 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 2021-10-21 07:29:54.
• 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 2021-10-21 07:29:54.
• Preliminary real time K index last three hours [12:00:00-15:00:00 UTC]: 0
  (http://www2.irf.se/maggraphs/preliminary_real_time_k_index)

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