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SC-A CIR Event 1 March 2013 CME Event 17 March 2013 SC-A SC-B Enhancement of Inner Zone Electron...

Date post: 11-Jan-2016
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SC-A CIR Event 1 March 2013 CME Event 17 March 2013 SC-A SC-B Enhancement of Inner Zone Electron Fluxes Both events caused electron enhancements for <200 keV What is the mechanism? Will CIRs always have such These are background corrected No electrons >800 keV !
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Page 1: SC-A CIR Event 1 March 2013 CME Event 17 March 2013 SC-A SC-B Enhancement of Inner Zone Electron Fluxes Both events caused electron enhancements for

SC-ACIR Event1 March 2013

CME Event17 March 2013 SC-A SC-B

Enhancement of Inner Zone Electron Fluxes

Both eventscaused electron enhancements for <200 keV

What is the mechanism?Will CIRs alwayshave such penetration?

These are background corrected

No electrons >800 keV !

Page 2: SC-A CIR Event 1 March 2013 CME Event 17 March 2013 SC-A SC-B Enhancement of Inner Zone Electron Fluxes Both events caused electron enhancements for

Enhancement of Slot Region Electron Fluxes

CIR Event1 March 2013

CME Event17 March 2013

Electrons enhanced at all L* for ≤300 keV and enhanced at higher L* for >300 keV

No electrons > 1 MeV !

Electrons enhanced for <200 keV at lowest L* and up to 400 keV at higher L*

Page 3: SC-A CIR Event 1 March 2013 CME Event 17 March 2013 SC-A SC-B Enhancement of Inner Zone Electron Fluxes Both events caused electron enhancements for

Will Use CIR Observations From CY24 Declining Phase to Characterize Low L* Differences Between CIR and CME Responses

• We have observed CME related enhancements of electrons in the slot region and deep in the inner zone in multiple events previously

• We have an observation of such enhancements by a CIR• Are such enhancements common for CIRs? • This we can learn as we move towards solar minimum where CIRs

will be the primary driver of radiation belt enhancements– Will we find a fundamental difference between CIR and CME related

electron enhancements at these lower L* regions?– Are these enhancements “injections” or other?


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