A solar flare is a violent explosion that takes place on the surface of the sun. The energy released as a result of this explosion is equivalent to that caused by millions of hydrogen bombs. These flares are caused due to the sudden release of the magnetic energy stored within the solar surface. This magnetic energy heats up and accelerates the protons and neutrons resulting in explosion. Solar flares occur in three stages. The first stage is the precursor stage during which the magnetic energy is released. The second stage is the impulsive stage where the protons and the neutrons are accelerated with the release of radio waves, x rays and gamma rays. The final stage is the decay stage where the x rays begin to decay gradually. Solar flare occurs in the outermost surface of the sun called corona. They appear as bright loops in the areas of strong magnetic field called active regions. Hence sun spots tend to appear in active region. Depending on the magnetic flux the solar flares are classified as A, B, C, M and X. Solar flares results in release of clusters of accelerated particles known as proton storm. Proton storm is very hazardous as they may cause biochemical damage to human body. Solar flares are not visible to naked eye, but the radiations released can be seen with the help of some scientific instruments.