Abstract:In this paper, according to the different ways of release, we perform a detailed analysis of earthquake early warning information release time-delay. The results show that the release time-delay by warning receiving terminal is less than 1 second. It is the same with radio or television release, but efficiency is greatly influenced by time period. Using the internet (new media, mobile phone APP, third-party platform to push) release time-delay is greatly influenced by user concurrency: ten million users of release time delay is 30 to 40 seconds, so we argue that we should use fractal area classification release strategy to effectively improve release time. Analysis of the Wenchuan earthquake for example, shows that within 20 to 50 km, more than 95% of Internet users have 1-7 seconds of warning time; more than 95% of the Internet users who are in the biggest rupture area (Beichuan) will gain more than 30 seconds of warning time.