Provisional Dst index
Note! These data are only for non-commercial monitoring purpose.
The provisional Dst index is calculated from geomagnetic field data which were visually screened for artificial noises.
Acknowledgments: We thank the geomagnetic observatories (Kakioka [JMA], Honolulu and San Juan [USGS], Hermanus [RSA], Alibag [IIG]), NiCT, INTERMAGNET, and many others for their cooperation to make the provisional Dst index available.