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

1.667

Quiet

24h maximum

4.667

Minor storm

Recent trend (last 8 readings)

Jul 15, 3:45 PM UTCHp30 2.667ap30 12
Jul 15, 4:15 PM UTCHp30 2.333ap30 9
Jul 15, 4:45 PM UTCHp30 2.667ap30 12
Jul 15, 5:15 PM UTCHp30 2.000ap30 7
Jul 15, 5:45 PM UTCHp30 2.333ap30 9
Jul 15, 6:15 PM UTCHp30 1.667ap30 6
Jul 15, 6:45 PM UTCHp30 1.333ap30 5
Jul 15, 7:15 PM UTCHp30 1.667ap30 6
GFZ Hp30realtime
Observed: Jul 15, 7:15 PM UTCFetched: Jul 15, 7:58 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

524

nT (nanotesla)

24h peak

1074

nT (nanotesla)

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

Hourly series (last 8 hours)

Jul 5, 4:00 PM UTCMean 411.8Peak 544
Jul 5, 5:00 PM UTCMean 458.1Peak 633
Jul 5, 6:00 PM UTCMean 316.9Peak 459
Jul 5, 7:00 PM UTCMean 444.3Peak 547
Jul 5, 8:00 PM UTCMean 507.8Peak 557
Jul 5, 9:00 PM UTCMean 608.3Peak 753
Jul 5, 10:00 PM UTCMean 621.9Peak 811
Jul 5, 11:00 PM UTCMean 618.6Peak 785
Kyoto WDC AEprovisional
Observed: Jul 5, 11:59 PM UTCFetched: Jul 15, 7:58 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.
High-Speed Stream
Jul 14, 10:24 PM UTC

2026-07-14T22:24:00-HSS-001

Interplanetary Shock
Jul 14, 2:38 PM UTC

2026-07-14T14:38:00-IPS-001

Interplanetary Shock
Jul 13, 2:39 PM UTC

2026-07-13T14:39:00-IPS-001

Interplanetary Shock
Jul 13, 12:30 PM UTC

2026-07-13T12:30:00-IPS-001

Interplanetary Shock
Jul 12, 2:30 AM UTC

2026-07-12T02:30:00-IPS-001

Interplanetary Shock
Jul 11, 4:25 PM UTC

2026-07-11T16:25:00-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: Jul 15, 7:58 PM UTC