Аннотация:We use all powerful X-ray
ares observations from 1976 up to 2013 to study a possible cor-
relation between the moments of occurrence of
ares and a phase of a solar cycle. The con-
sidered time interval corresponds to cycles 21, 22 and 23 with maximum heights W21=164.5,
W22=158.5 and W23=120.8. We nd that: 1)Only two of all of 30
ares considered have
arisen on a branch of growth of cycles. The others 28 were observed or near to maxima of
cycles, or on a decline branch. Probably it is a consequence of a specic eld of velocities in
a latitudes interval 15 on the Sun, favorable for work of the reconnection mechanism; 2)The
number of powerful
ares in a cycle does not correlate with its height: cycles 21 and 22 are
almost identical on height (W21=164.5, W22=158.5), but the quantity of
ares in them diers
almost in 2 times (8
ashes in 21-st cycle and 14
ashes in 22-nd). At the same time cycles 21
and 23, appreciably distinguished on height, gave identical quantity of
ashes (8
ares in each
cycle); 3)In the lowest 23-rd cycle (W23= 120.8) there were the most powerful
ares for all
period of observations: two
ares of class X17, one
are of class X20 and, apparently, unique
for last 144 years super
are of class X28+. The conclusion is made, that approximately up
to 2019 it is possible to expect occurrence of M-class
ares and X-class
ares up to X8. More
powerful
ares are not excluded as well. Probability of the super power
ares on the scale of
that in 1859 (Carrington event) is low.