Solar flare forcing on ionization of upper atmosphere. comparative study of several major X-class events of 23rd and 24th solar cycles

By analyzing the GNSS (Global Navigational Satellite Systems) signals recorded at the IGS (International GNSS Service) network, we compare the effects of ionization of the upper atmosphere by a series of intense X-class solar flares during the 23rd and 24th solar cycles. We develop the methods for estimating the geo-effectiveness of solar flares from the GNSS data and suggest using the rate of change of the ionospheric total electron content averaged over all the receiving stations located on the sunlit side of the Earth reduced to the solar zenith angle during the flare as the characteristic of the flare’s geo-effectiveness.

[1]  S. Kuznetsov,et al.  X-ray, γ-emission and energetic particles in near-Earth space as measured by CORONAS-F satellite: From maximum to minimum of the last solar cycle , 2007 .

[2]  Yury Yasyukevich,et al.  Investigation of SBAS L1/L5 Signals and Their Application to the Ionospheric TEC Studies , 2015, IEEE Geoscience and Remote Sensing Letters.

[3]  B. Hofmann-Wellenhof,et al.  Global Positioning System , 1992 .

[4]  Hong Yuan,et al.  The GPS measured SITEC caused by the very intense solar flare on July 14, 2000 , 2005 .

[5]  Boris V. Somov,et al.  Physical processes in solar flares , 1991 .

[6]  Artem M. Padokhin,et al.  Ionospheric radio tomography based on the GPS/GLONASS navigation systems , 2011 .

[7]  Lou‐Chuang Lee.  Solar Terrestrial Physics , 1972 .

[8]  L. A. Leonovich,et al.  The use of the international GPS network as the global detector (GLOBDET) simultaneously observing sudden ionospheric disturbances , 2000 .

[9]  V. E. Kunitsyn,et al.  GNSS radio tomography of the ionosphere: The problem with essentially incomplete data , 2011 .

[10]  E. L. Afraimovich,et al.  GPS global detection of the ionospheric response to solar flares , 2000, physics/0007026.

[11]  L. Kersley,et al.  Behavior of the ionospheric F region during the Great Solar Flare of August 7, 1972 , 1974 .

[12]  A. Mannucci,et al.  The October 28, 2003 extreme EUV solar flare and resultant extreme ionospheric effects: Comparison to other Halloween events and the Bastille Day event , 2005 .

[13]  A. Mitra,et al.  Ionospheric effects of solar flares , 1974 .

[14]  A. Padokhin,et al.  Determining the intensity of solar flare ionizing radiation from data of the GPS/GLONASS navigation systems , 2007 .

[15]  Ignasi Ribas,et al.  Solar flares as proxy for the young Sun: satellite observed thermosphere response to an X17.2 flare of Earth's upper atmosphere , 2012 .