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

4

Active

24h maximum

8

Severe

Recent trend (last 8 readings)

Oct 11, 12:45 AM UTCHp30 3.667ap30 22
Oct 11, 1:15 AM UTCHp30 4.000ap30 27
Oct 11, 1:45 AM UTCHp30 4.000ap30 27
Oct 11, 2:15 AM UTCHp30 4.667ap30 39
Oct 11, 2:45 AM UTCHp30 4.000ap30 27
Oct 11, 3:15 AM UTCHp30 4.667ap30 39
Oct 11, 3:45 AM UTCHp30 3.667ap30 22
Oct 11, 4:15 AM UTCHp30 4.000ap30 27
GFZ Hp30realtime
Observed: Oct 11, 4:15 AM UTCFetched: Oct 11, 4:37 AM 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

25

nT (nanotesla)

24h peak

704

nT (nanotesla)

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

Hourly series (last 8 hours)

Sep 27, 4:00 PM UTCMean 103.3Peak 129
Sep 27, 5:00 PM UTCMean 52.7Peak 104
Sep 27, 6:00 PM UTCMean 24.8Peak 47
Sep 27, 7:00 PM UTCMean 18.1Peak 33
Sep 27, 8:00 PM UTCMean 21.6Peak 31
Sep 27, 9:00 PM UTCMean 24.9Peak 38
Sep 27, 10:00 PM UTCMean 31.4Peak 45
Sep 27, 11:00 PM UTCMean 24.9Peak 38
Kyoto WDC AEprovisional
Observed: Sep 27, 11:59 PM UTCFetched: Oct 11, 4:37 AM 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.
Geomagnetic Storm
Oct 10, 3:00 PM UTC

2026-10-10T15:00:00-GST-001

Interplanetary Shock
Oct 10, 2:33 PM UTC

2026-10-10T14:33:00-IPS-001

Interplanetary Shock
Oct 10, 1:48 AM UTC

2026-10-10T01:48:00-IPS-001

Interplanetary Shock
Oct 9, 10:41 AM UTC

2026-10-09T10:41:00-IPS-001

Geomagnetic Storm
Oct 4, 6:00 PM UTC

2026-10-04T18:00:00-GST-001

Interplanetary Shock
Oct 3, 11:41 PM UTC

2026-10-03T23:41:00-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: Oct 11, 4:37 AM UTC