Solar-Geophysical Data Number 642, February 1998. Part 1 (Prompt Reports). Datafor December 1997, January 1998 and Late Data. Explanation of Data Reports Issued as Number 515 (Supplement) July 1987

摘要

;Contents: Data for January 1998; Solar-Terrestrial Environment; ISES AlertPeriods (Advance and Worldwide); Solar Activity Indices; Solar Flares; Solar Radio Emission; Stanford Mean Solar Magnetic Field; GOES-7 Daily Electron Fluence; Data for December 1997; Solar Active Regions; Sudden Ionospheric