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| Mail header | SIDC code | Description | format | Frequency | Source |
| advance alert: enhanced geomagnetic activity warning | MAKalert | Plain text | ASAP, when the MAK model forecasts K>=6 | SIDC (RWC-Belgium) | |
| Boumeuss | bms | Sunspot data. | Encoded data (ISES) | daily | SEC (RWC-Boulder,US) |
| Geoalert RWC-Belgium | xut | Forecast, solar events, daily solar and geomagnetic indices, solar regions: data and flare forecast. | Encoded data (ISES) | daily | SIDC (RWC-Belgium) |
| Geoalert RWC-Boulder | geo | Forecast, solar events, daily solar and geomagnetic indices, solar regions: data and flare forecast. | Encoded data (ISES) | daily | SEC (RWC-Boulder,US) |
| GOES X-ray flare detection alert | flaremail | This message is of the fast alert type. It is sent out when SIDC software detects in the GOES data a flare with an X-ray radiation flux stronger than M5. | Plain text | ASAP, when a flare >M5 has been detected | SIDC (RWC-Belgium) |
| gps-RTK daily bulletin | gpsRTKD | Bulletin on ionospheric small-scale variability over Belgium | Plain text | daily | GPS Section of the Royal Observatory of Belgium |
| gps-RTK monthly bulletin | gpsRTKM | Bulletin on ionospheric small-scale variability over Belgium | Plain text | monthly | GPS Section of the Royal Observatory of Belgium |
| gps-RTK weekly bulletin | gpsRTKW | Bulletin on ionospheric small-scale variability over Belgium | Plain text | weekly | GPS Section of the Royal Observatory of Belgium |
| Halo CME detection alert | cactus | This message is of the fast alert type. It is sent out when the CACTus software detects in image sequences from LASCO a halo CME with an angular width of more than 180°. | Plain text | ASAP, when CME has been reliably detected | SIDC (RWC-Belgium) |
| INDAA message | ind | Preliminary aa indices, based on k indices from Hartland (UK) and Canberra (Australia). | Encoded data (ISES) | weekly | SIDC (RWC-Belgium) |
| Indices K Canberra | kcan | K indices from Canberra. | Encoded data (ISES) | weekly | Canberra (Australia) |
| Indices K Hartland | khar | K indices from Hartland. | Encoded data (ISES) | weekly | Hartland (UK) |
| MAA message | maa | Encoded data (special format) | weekly | SIDC (RWC-Belgium) | |
| Messages UMAGF | menv | Encoded data (ISES) | Daily | SIDC (RWC-Belgium) | |
| Monthly Report on the International Sunspot Number | ri | Fast update on the provisional daily sunspot numbers (total and hemispheric), provisional monthly sunspot numbers. | Plain text | monthly | SIDC (RWC-Belgium) |
| Monthly Ri_hemispheric report | ri_hemispheric | Plain text | monthly | SIDC (RWC-Belgium) | |
| Presto | presto | Fast warning for important solar events with implications for the space environment. | Plain text | ASAP, when needed | SIDC (RWC-Belgium) |
| SIDC Monthly Bulletin of Solar and Geomagnetic Activity | mobu | Sunspot bulletin with the provisional daily sunspot numbers (total and hemispheric), provisional monthly sunspot numbers; summary of ursigrams; Uccle local Observations; monthly summary of solar and geomagnetic activity; noticeable solar events; Halo CME list. | monthly | SIDC (RWC-Belgium) | |
| SIDC Ursigram | meu | 3-day-forecast of solar and geomagnetic activity. | Plain text | daily | SIDC (RWC-Belgium) |
| SIDC Ursigram | tot | Encoded data (ISES) | daily | SIDC (RWC-Belgium) | |
| SIDC Ursigram | uge | Encoded data (ISES) | daily | SIDC (RWC-Belgium) | |
| SIDC-NEWS | qua | Definitive daily sunspot numbers (total and hemispheric), definitive monthly sunspot numbers. | Plain text | quarterly | SIDC (RWC-Belgium) |
| Start/End of all quiet alert | quieta | This message is of the fast alert type. It is sent when quiet Space Weather conditions are expected for the next 48 hours or until further notice. This implies that: * the solar X-ray output is expected to remain below C-class level, * the K_p index is expected to remain below 5, * the high-energy proton fluxes are expected to remain below the event threshold. | Plain text | ASAP, when conditions warrant | SIDC (RWC-Belgium) |
| STCE Newsletter | stcenews | News from the Solar Terrestrial Center of Excellence | Plain text | Almost weekly | STCE |
| UMAGF Messages from Moscow | mos | Geomagnetic Ak an K indices from several Russian stations, relayed by RWC Moscow. | Encoded data (ISES) | daily | RWC Moscow |
| Weekly bulletin | bul | Review of past solar and geomagnetic activity. | Plain text | weekly | SIDC (RWC-Belgium) |