2.3.0 spase://GBO/NumericalData/Indices/ASY-SYM/PT1M ASY and SYM indices 2018-08-01T17:53:31Z ASY and SYM geomagnetic indices. The web site of WDC for Geomagnetism at Kyoto U., url given below, offers plots and numeric downloads for 1-minute ASY, SYM, and related indices. Values of ASY-D, ASY-H, SYM-D, and SYM-H are available from 1981 to within 1-2 months of current date. All ASY and SYM data are currently (as of 12/07/2011) marked as "provisional." Alternative sources of the WDC/Kyoto-generated ASY and SYM indices include the 1-min OMNI data set at NASA/GSFC/SPDF. WDC for Geomagnetism (Kyoto-U., Japan) spase://SMWG/Person/Toshihiko.Iyemori GeneralContact Description of ASY and SYM http://wdc.kugi.kyoto-u.ac.jp/aeasy/asy.pdf Paper by T. Iyemori et al. on derivation of ASY and SYM indices, and on their relation to Dst and AE indices. spase://VSPO/NumericalData/ASY_SYM_Indices spase://VSPO/NumericalData/WDC/Indices/ASY-SYM/PT1M spase://SMWG/Repository/WDC/Geomagnetism/KyotoU Online Open WDC for Geomagnetism at Kyoto U. http://wdc.kugi.kyoto-u.ac.jp/aedir/index.html Multi-option path to AE and related indices at Kyoto, including index documentation and history files. Text spase://SMWG/Repository/NASA/GSFC/SPDF Online Open OMNIWeb https://omniweb.gsfc.nasa.gov/ow_min.html Path to 1-min OMNI data set for 1995 and later, with subset/plot/list functionalities, and to ftp accessibility. Text Calibrated MagneticField ActivityIndex 1981-01-01T00:00:00 -P1M PT1M Earth.Surface