  We advocate the idea that the nanoflares conjectured by Parker long ago to
resolve the corona heating problem, may also trigger the larger solar flares.
The arguments are based on the model where emission of extreme ultra violet
(EUV) radiation and soft x-rays from the Sun are powered externally by incident
dark matter particles within the Axion Quark Nugget (AQN) Dark Matter Model.
The corresponding annihilation events of the AQNs with the solar material are
identified with nanoflares. This model was originally invented as a natural
explanation of the observed ratio $\Omega_{\rm dark} \sim \Omega_{\rm visible}$
when the DM and visible matter densities assume the same order of magnitude
values. This model gives a very reasonable intensity of EUV radiation without
adjustments of any parameters in the model. When the same nuggets enter the
regions with high magnetic field they serve as the triggers igniting the
magnetic reconnections which eventually may lead to much larger flares.
Technically, the magnetic reconnection is ignited due to the shock wave which
inevitably develops when the dark matter nuggets enter the solar atmosphere
with velocity $v_{\rm AQN}\sim ~600~ {\rm km/s}$ which is much higher than the
speed of sound $c_s$, such that the Mach number $M=v_{\rm AQN}/c_s\gg 1$. These
shock waves generate very strong and very short impulses expressed in terms of
pressure $\Delta p/p\sim M^2$ and temperature $\Delta T/T\sim M^2$ in vicinity
of (would be) magnetic reconnection area. The mechanism is consistent with the
observed scaling of the flare distribution $dN\sim W^{-\alpha}dW$ as a function
of the flare's energy $W$. We also speculate that the same nuggets may trigger
the sunquakes which are known to be correlated with large flares.
