Ionospheric and dayglow responses to the radiative phase of the Bastille Day flare

Details Ionospheric and dayglow responses to the radiative phase of the Bastille Day flare Ionospheric and dayglow responses to the radiative phase of the Bastille Day flare

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29j..99m&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 10, pp. 99-1, CiteID 1461, DOI 10.1029/2001GL013956

Astronomy and Astrophysics

Astrophysics

16

Ionosphere: Ionospheric Disturbances, Ionosphere: Solar Radiation And Cosmic Ray Effects, Atmospheric Composition And Structure: Airglow And Aurora, Solar Physics, Astrophysics, And Astronomy: Flares

Scientific paper

The Sun's Bastille Day flare on July 14, 2000 produced a variety of geoeffective events. This solar eruption consisted of an X-class flare followed by a coronal mass ejection that produced a major geomagnetic storm. We have undertaken a study of this event beginning with an analysis of the effects of the radiative phase of the flare on the dayglow and the ionosphere. The key new enabling work is a novel method of evaluating the X-ray and extreme ultraviolet (EUV) solar spectral irradiance changes associated with the flare. We find that the solar radiative output enhancements modeled during the flare are consistent with measurements of both solar EUV irradiance and far UV Earth thermospheric dayglow. We use the SAMI2 model to predict global ionospheric changes along a magnetic meridian that show significantly different northern and southern effects, suggesting that flares can be used to study ionospheric dynamics.

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