Dst index (Kyoto)

What this shows

The Dst index measures the depression of the horizontal magnetic field at the equator caused by the ring current during a geomagnetic storm. More negative means a stronger storm: below −50 nT is already a storm; below −250 nT, extreme. These are quicklook values, which Kyoto later replaces with provisional and then final ones; the current hour is updated as it fills.

Product fact sheet

Source

WDC Kyoto (HAPI server), with NOAA SWPC as fallback

Original cadence

1 hour (near-real-time data)

Licence

Non-commercial use; quicklook data (WDC Kyoto)

Citation

World Data Center for Geomagnetism, Kyoto, M. Nose, T. Iyemori, M. Sugiura, T. Kamei, A. Matsuoka, S. Imajo, and T. Kotani (2015), Geomagnetic Dst index, doi:10.17593/14515-74000

Used by

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On the provider's site

WDC Kyoto · WDC Kyoto HAPI · NOAA SWPC