With x - ray " s erupting generated by solar proton flare , x - ray transmit toward earth with light speed and isn " t effected by magnetic field of earth . it arrive in earth earlier several decades minutes to hours than proton liquid . make use of the difference of time they spend on space spread , we make alarm for solar proton event by physical character of solar x - ray , which is a very valid means 伴隨太陽質(zhì)子耀斑產(chǎn)生的x射線爆發(fā),它以光速向地球傳播而且不受地磁場的影響,它比質(zhì)子流超前幾十分鐘甚至幾十小時到達(dá)地球,利用二者在空間傳播的時間差,以太陽x射線某些物理特征警報太陽質(zhì)子事件是一種十分有效的手段。