The Extreme Solar Flares of October 28th and November 4th, 2003 and Resultant Extreme Ionospheric Effects

Details The Extreme Solar Flares of October 28th and November 4th, 2003 and Resultant Extreme Ionospheric Effects The Extreme Solar Flares of October 28th and November 4th, 2003 and Resultant Extreme Ionospheric Effects

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsh43b..03t&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SH43B-03

Physics

2415 Equatorial Ionosphere, 2479 Solar Radiation And Cosmic Ray Effects, 7519 Flares, 7549 Ultraviolet Emissions

Scientific paper

Some of the most intense solar flares in recorded history occurred at the end of 2003. The November 4th event is the largest on record (X28) and the October 28th flare was the fourth most intense (X17). These will be compared/contrasted to the July 14, 2000 Bastille Day (X6) event. We use SOHO EUV (SEM), GOES and TIMED x-ray data to characterize the flare spectral energy versus time. High time resolution, ~1s ground base GPS data are used to examine the abrupt increase in path-integrated ionospheric total electron content (TEC). It will be shown that the dayside ionosphere responds dramatically to the x-ray, FUV and EUV input by an abrupt ~20-25 percent increase in ionospheric electron densities. Polar and IMAGE UV spectra are used to quantify the dayglow enhancements. The TEC increases are nonlinearly related to the peak flare intensities. The reasons for this are not understood at this time. Ionospheric models using the flare input data will be used to compared against tomographic analyses of the GPS information.

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