The solar wind
is a flow of charged particles (charged particles consists of electrons, protons and alpha particles having thermal energy of 1.5 to 10 KeV ) . These particles released from upper atmosphere of the Sun . These charged particles can escape from gravitional energy of sun because they have high velocity with high energy resulting from the high temperature (upto 2 million degree celcius ) of the corona which disturbs the coronal magnetic field .(A corona is an aura of plasma that surrounds the sun and other stars) .
At this level, the sun’s gravity can’t hold such a fast moving particles, and it streams away out of the sun.
The speed of these escaped solar particle is on supersonic level . They travel with the speed of 750kilometer per second at nearer and when they travel farther from sun the velocity decrease and they travel minimum speed of 250 kilometer per second . Not just speed but also temperature of these particle reaches upto 1 million degree .
Effect of solar wind to earth
Since solar wind consisting charged particles and many radiations , if these radiations and flares enters to earth then they cause many problems to living beings . Thanks to earth magnetic field which protects us from such harmful radiations .