Geomagnetic Surface

Geomagnetic Monitoring

Track geomagnetic storm conditions with near-real-time magnetic field indices, auroral electrojet activity, and recent disturbance events from NASA DONKI. This monitoring surface focuses on how solar activity translates into geomagnetic response around Earth.

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Kyoto AE quicklook values can lag real time by roughly three weeks or less.
GFZ Hp30
Half-hour geomagnetic nowcast from GFZ Potsdam. Faster than the traditional 3-hour Kp index, giving operators a more timely picture of geomagnetic conditions.

Current Hp30

1

Quiet

24h maximum

2

Quiet

Recent trend (last 8 readings)

Apr 15, 5:15 PM UTCHp30 2.000ap30 7
Apr 15, 5:45 PM UTCHp30 1.667ap30 6
Apr 15, 6:15 PM UTCHp30 1.667ap30 6
Apr 15, 6:45 PM UTCHp30 1.333ap30 5
Apr 15, 7:15 PM UTCHp30 0.667ap30 3
Apr 15, 7:45 PM UTCHp30 1.000ap30 4
Apr 15, 8:15 PM UTCHp30 0.667ap30 3
Apr 15, 8:45 PM UTCHp30 1.000ap30 4
GFZ Hp30realtime
Observed: Apr 15, 8:45 PM UTCFetched: Apr 15, 9:28 PM UTC
View upstream source
Kyoto AE
Auroral electrojet quicklook data from Kyoto WDC. Note: this data is provisional and can lag real time by up to three weeks.

Latest minute

720

nT (nanotesla)

24h peak

2930

nT (nanotesla)

Kyoto AE quicklook values can lag real time by roughly three weeks or less.

Hourly series (last 8 hours)

Mar 22, 4:00 PM UTCMean 1188.7Peak 1668
Mar 22, 5:00 PM UTCMean 1125.5Peak 1828
Mar 22, 6:00 PM UTCMean 586.0Peak 786
Mar 22, 7:00 PM UTCMean 777.5Peak 1681
Mar 22, 8:00 PM UTCMean 688.8Peak 1356
Mar 22, 9:00 PM UTCMean 600.1Peak 784
Mar 22, 10:00 PM UTCMean 380.2Peak 470
Mar 22, 11:00 PM UTCMean 964.2Peak 2930
Kyoto WDC AEprovisional
Observed: Mar 22, 11:59 PM UTCFetched: Apr 15, 9:28 PM UTC
View upstream source
Disturbance Lane
Recent geomagnetic storms (GST), interplanetary shocks (IPS), and high-speed streams (HSS) from NASA DONKI that relate to the geomagnetic conditions above.
Interplanetary Shock
Apr 13, 10:31 AM UTC

2026-04-13T10:31:00-IPS-001

Interplanetary Shock
Apr 10, 6:20 AM UTC

2026-04-10T06:20:00-IPS-001

High-Speed Stream
Apr 10, 2:12 AM UTC

2026-04-10T02:12:00-HSS-001

High-Speed Stream
Apr 6, 1:17 PM UTC

2026-04-06T13:17:00-HSS-001

Interplanetary Shock
Apr 4, 10:55 AM UTC

2026-04-04T10:55:00-IPS-001

Interplanetary Shock
Apr 3, 3:02 PM UTC

2026-04-03T15:02:00-IPS-001

About This Data

GFZ Hp30 provides the fastest planetary-activity signal, updated every 30 minutes. Values of 5+ correspond to geomagnetic storm conditions (G1+). This is near-real-time data — much faster than the traditional 3-hour Kp index.

Kyoto AE adds auroral zone context but with a clearly marked lag. The AE index measures electrical currents at ~65–70° latitude. Higher values indicate stronger substorm activity and more visible aurora.

The two indices are shown together by design: Hp30 for fast response, AE for auroral context. Together they give a more complete picture of geomagnetic conditions than either alone.

Snapshot generated: Apr 15, 9:28 PM UTC