| SSN (1974) | Monthly and yearly: Solar Influences Data Analysis Center (https://www.sidc.be/SILSO/datafiles) |
| SPMF (1976) | Stanford Solar Observatory (http://wso.stanford.edu) |
| SMMF (1975) |
| X-ray flare (1975) | M-class: NOAA National Centers for Environmental Information (NCEI) (https://www.ngdc.noaa.gov/stp/solar/solarflares.html)http://ftp.swpc.noaa.gov/pub/warehouse/ |
| SFI (1976) | Monthly & Yearly: NOAA NCEI (https://www.ngdc.noaa.gov/stp/solar/solarflares.html) |
| TSI (1976) | Daily composite TSI: Physikalishch-Meteorologisches Observatorium Davos World Radiation Center(htttp://ftp.pmodwrc.ch/pub/data/irradiance/virgo/TSI/TSI_composite/) |
| F10.7 (1974) | Daily OMNIWEB data: Goddard Space Flight Center (https://omniweb.gsfc.nasa.gov/form/dx1.html) |
| IMF (1974) |
| Dynamic pressure (1974) |
| Ap index (1974) |
| GCR intensity (1974) | Daily: McMurdo, Jang Bogo, and Oulu neutron monitors(http://neutronm.bartol.udel.edu/, https://www.nmdb.eu/nest/, https://cosmicrays.oulu.fi/) |