Geomagnetic Data Service
The rules for the data use and exchange are defined by
WDS Data Policy.
The appropriate institution(s) is also supplied with the WDC data sets.
If the data are used in publications and presentations,
the data suppliers
and the WDC for Geomagnetism, Kyoto must properly be acknowledged.
Commercial use and re-distribution of WDC data are, in general, not
Please ask for the information of each observatory to the WDC.
The construction of this database has been supported in part by grants 127008, 168069, 178061, 188071, 198053, 208041, 218046, 228040, and 238033 ("Solar-Terrestrial Physics Database") as well as by grants 248032 and 268023 ("Database of high time resolution geomagnetic field data back to 1920's") under the Japan Society for Promotion of Science (JSPS). We also thank many geomagnetic observatories, institutions and international organizations which kindly supply the data to our data center.
On geomagnetic data
- Dst index / Real-time (quicklook) Dst index in this month
- AE index / Real-time (quicklook) AE index in this month
Plot and download of Dst and AE (Hourly Values) indices [Since 1957]
Plot and download of ASY/SYM [since 1981] and AE [since 1975]
- Substorm Swift Search
(Stack plots and digital data of AE/ASY/Wp indices and others) [since 2005]
- Kp index [Since 1932]
(with ap and Ap)
The quietest and most disturbed days [Since 1932]
Geomagnetic Field Data at the Observatories