Аннотация:The analysis of the influence of large solar flares (X-ray class> M5) according to GOES-15 data in the 24th solar activity cycle on the state of near-Earth outer space (space weather) was made. Three main ionospheric indices – Ap, Kp, Dst and F10.7 (the main index of solar activity) are considered. In the work we used data obtained at the GOES, SOHO and SDO orbital stations in the period 2010-2017.