Programme  Titles  Presenters    Analysis of Long Time Series June 17th, 2008, 14:30-15:30 Green Center: Petroleum Hall Chair: Jeffrey Love O28 EXTENDING BACKWARDS TO 1885 THE FRENCH MAGNETIC HOURLY DATA SERIES Danielle Fouassier*, Arnaud Chulliat O29 THE EFFECTS OF MISSING DATA ON MEAN HOURLY VALUES Donald Herzog O32 ANALYSES IN SPACE-TIME AND FREQUENCY DOMAINS OF GEOMAGNETIC FIELD MONITORIZED OVER 65 YEARS AT SURLARI NATIONAL GEOMAGNETIC OBSERVATORY Laurentiu Asimopolos*, Agata Monica Pestina, Eugen Niculici O33 ON THE LONG TERM VARIATION IN THE GEOMAGNETIC AND SOLAR ACTIVITIES Michel Menvielle