Abstract Hot flow anomalies (HFAs) are studied using observations of the FGM magnetometer and the CIS plasma detector aboard the four Cluster spacecraft. Previously we studied several specific features of tangential discontinuities on the basis of Cluster measurements in February–April 2003 and discovered a new condition for forming HFAs that is the solar wind speed is higher than the average. However during the whole spring season of 2003, the solar wind speed was higher than average. In this study we analyse HFAs detected in 2007, the year of solar cycle minimum. Our earlier result was confirmed: the higher solar wind speed is a real condition for HFA formation; furthermore this constraint is independent of Schwartz et al.’s condition for HFA formation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Cluster Hot Flow Anomaly Observations During Solar Cycle Minimum


    Contributors:
    Facskó, G. (author) / Tátrallyay, M. (author) / Erdős, G. (author) / Dandouras, I. (author)


    Publication date :

    2009-10-30


    Size :

    7 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




    Cluster Hot Flow Anomaly Observations During Solar Cycle Minimum

    Facsko, G. / Tatrallyay, M. / Erdos, G. et al. | British Library Conference Proceedings | 2009


    Multifrequency radio observations of the solar corona during cycle minimum

    Rigaud, D. / Lantos, P. / Alissandrakis, C.E. | Elsevier | 1991



    Voyager observations of low-energy ions during solar cycle 23

    Decker, R.B. / Krimigis, S.M. | Elsevier | 2002