A review of the impact of space radiation in the Earth’s atmospheric is presented in this work. The data for GCRs and GSRs were collected per day from observatories and placed in Microsoft excel spread sheet for statistical study. In the excel graph sheet, the data were treated with a threshold value. The results of the characterization of the major two events (ie GCRs and GSRs) against time (measured in hours) showed significant variations. The anti-correlation coefficient, r between GCRs and GSRs, ranging from-0.001 to-0.350, also shows that the events originates from different sources. The low level of r in this result indicates that other solar activities such as sunspot, coronal mass ejection, solar wind and directly enters the Earth’s atmosphere.