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Comparing SSN Index to X-ray Flare and Coronal Mass Ejection Rates from Solar Cycles 22-24  

Lisa Winter   Submitted: 2016-05-02 18:59

The newly revised sunspot number series allows for placing historical geoeffective storms in the context of several hundred years of solar activity. Using statistical analyses of the Geostationary Operational Environmental Satellites (GOES) X-ray observations from the past ~30 years and the Solar and Heliospheric Observatory (SOHO) Large Angle and Spectrometric Coronagraph (LASCO) Coronal Mass Ejection (CME) catalog (1996-present), we present sunspot-number-dependent flare and CME rates. In particular, we present X-ray flare rates as a function of sunspot number for the past three cycles. We also show that the 1-8 Å X-ray background flux is strongly correlated with sunspot number across solar cycles. Similarly, we show that the CME properties (e.g., proxies related to the CME linear speed and width) are also correlated with sunspot number for SC 23 and 24. These updated rates will enable future predictions for geoeffective events and place historical storms in the context of present solar activity.

Authors: Lisa M. Winter, Rick Pernak, and K.S. Balasubramaniam
Projects: GOES X-rays ,SoHO-LASCO

Publication Status: accepted to Solar Physics
Last Modified: 2016-05-04 09:22
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Comparing SSN Index to X-ray Flare and Coronal Mass Ejection Rates from Solar Cycles 22-24

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