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On July 19, 2001, more than 359,000 computers were infected with the Code-Red worm in less than 14 hours. To help get a feel for the global impact, Jeff Brown, animated the geographic spread of the worm in five minute intervals between midnight July 19 and midnight July 20, based on analysis of UCSD Network Telescope data by David Moore. Infected hosts were mapped to latitude and longitude values using Ixia's IxMapping. The size of each circle relates to the infected hosts mapped to the center of the circle. The analysis and animations are on the CAIDA Web site.

Credit: Jeff Brown, UCSD/CSE; David Moore, CAIDA at SDSC. © 2001 The Regents of the University of California. All rights reserved.