AAS 204th Meeting, June 2004
Session 38 Coronal Mass Ejections
SPD Poster, Tuesday, June 1, 2004, 10:00am-7:00pm, Ballroom

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[38.06] Characteristic Periodicities in the Coronal Mass Ejection Production

A. Lara (The Catholic University of America), N. Gopalswamy (NASA/Goddard Space Flight Center), S. Yashiro (The Catholic University of America)

The solar activity is cyclic by nature, some periods of activity are obvious and well known and some are hidden, but all of them should be related to fundamental processes in the solar interior like the dynamo. The search for hidden periodicities, which can give us information about the solar activity causes, has been done for many years with different degrees of success. Almost all measurable solar parameters have been subject to a power spectral analysis and now there are some well known periodicities related to such parameters. On the other hand there are some events like Coronal Mass Ejections (CMEs) which, until recently, were difficult to observe routinely and then, we did not have a reliable database to perform a power spectrum analysis. Using the LASCO/SOHO CME list, which contains the information of the CME characteristics observed from 1996 to 2003, we have now a reliable time series of the CME production during 8 years covering the minimum, maximum and part of the declining phases of solar activity cycle 23, in this work we present preliminary results of the power spectral analysis of the CME activity.

This work work was supported by NASA/LWS and NSF/SHINE (ATM 0204588) programs

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