Dear Colleague, You have received the magnetic activity index Dst through WDC C1 for Geomagnetism in Copenhagen. The index was created by WDC C2 for Geomagnetism, Kyoto. CONTACT PERSON: If you have any questions regarding the data please contact: Dr. Toyohisa Kamei WDC C2 for Geomagnetism Data Analysis Center for Geomagnetism and Spacemagnetism Faculty of Science Kyoto University Japan E-mail: toyo@kugi.kyoto-u.ac.jp Fax (or telex): +81 75 722 7884 Phone: Acknowledgement: If the data is used in a publication kindly acknowledge: WDC C2 for Geomagnetism, Kyoto Sincerely yours, Susanne Vennerstroem WDC C1 for Geomagnetism Solar-Terrestrial Physics Division WDC C1 in Copenhagen Lyngbyvej 100 DK-2100 Copenhagen Denmark Fax: +45 39 15 74 60 E-mail: wdcc1@dmi.dk