30 Years of sfe in the Ebro Observatory

J.J. Curto (1) , J.O. Cardus (1) , J.M. Torta (1) , Christine Mazaudier (2) , M. Menvielle (3)

1 OE - Observatori de l'Ebre
2 CRPE - Centre de recherches en physique de l'environnement terrestre et planétaire
3 UP11 - Université Paris-Sud - Paris 11

The magnetic effect produced by chromospheric fiares, sfe, are not a mere amplitude increa.se of the diurnal variation, Sq. In some cases they are a decrease. In base of an statistic study over 30 years of magnetic records in Ebre, we have found; a) a dependence in phase lag of sfe and Sq vectors with local time. In fact, phase lag greater than 902, reversed sfe, eoncentratc between 10 and 12 hours; b) the reversed sfe have an equinoctial character; c) It exists a weaker correlation of the solar activity with the reversed sfe than with the regular ones.

Domaines: Sciences de la Terre

J.J. Curto, J.O. Cardus, J.M. Torta, Christine Mazaudier, M. Menvielle. 30 Years of sfe in the Ebro Observatory. Revista de Geofisica, 1992, 48, pp.141-151. ⟨hal-00998510⟩