The estimation and characterizes of interval time between associated arrived Interplanetary Coronal Mass Ejection-Storm Sudden Commencement (ICME-SSC) events is the aim of this research. The travel time of the CME-Shock could be estimated from an empirical equation that depends on ICME's mass and velocity. It helps us to estimate the more accurate Coronal mass ejection's (CME) travel time reaching Earth. A high correlation was found between interval time and ICME's mass during the period 1996-2010.