Extended search for correlation between solar mean magnetic field BiSON data and coronal mass ejections

William J. Chaplin*, Andrew M. Dumbill, Yvonne P. Elsworth, George R. Isaak, Clive P. McLeod, Brek A. Miller, Roger New, Balázs Pintér

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (SciVal)

Abstract

The Birmingham Solar-Oscillations Network (BiSON) has acquired high-precision solar mean magnetic field (SMMF) data on a 40-s cadence for a decade. We present attempts to compare such data from recent years with the occurrence of coronal mass ejections (CMEs) as recorded by LASCO, using correlation techniques applied to measurements from different BiSON instruments to maximise the sensitivity to CME-related SMMF responses. SMMF measurements were recorded at the time of occurrence of several hundred CMEs. No CME event shows a convincing response in our SMMF data at short periods setting a threshold amplitude of 12 mG. By averaging data sets we are able to set lower thresholds, which depend somewhat on the distribution of response strengths. A brief summary of the very first results of this study is also given in Chaplin et al. (2003b).

Original languageEnglish
Pages (from-to)307-316
Number of pages10
JournalSolar Physics
Volume220
Issue number2
DOIs
Publication statusPublished - Apr 2004

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