Recent news
Yu. V. Yasyukevich, S. V. Voeykov, I. V. Zhivetyev, E. A. Kosogorov. Ionospheric response to solar flares of c and m classes in January–February 2010 // Space Research 2013, vol.51, No. 2, pp. 125-135
Ionospheric response to solar flares of c and m classes in January–February 2010
- Institute of Solar-Terrestrial Physics SB RAS, Irkutsk
- Institute of Cosmophysical Research and Radio Wave Propagation FEB RAS
The response of the ionosphere to solar flares is analyzed at the beginning of the rise of solar activity, when the background ionization of the ionosphere is still quite low. It is shown that algorithms and methods for averaging variations and the derivative of the total electron content (TEC) over the entire illuminated ionosphere almost always make it possible to identify the response of the ionosphere even to weak C-class solar flares that are sufficiently close in time. It was found that the response to a solar flare that is sufficiently intense in the X-ray range may practically not manifest itself, due to the absence of a flare in the ultraviolet part of the spectrum. For the M 6.4 flash (7.II.2010), a map of the TEC derivative on the territory of Japan with an average resolution of ~ 18 km was constructed. Before the maximum of the flash, the TEC derivatives synchronously increase over the whole territory of Japan. After the flash maximum, the TEC derivatives do not change so synchronously and local differences occur.
