Web-based animated applications have been developed for effective analysis of observed multi-point, multi-channel vibration data by use of the Flash animation technique. The applications are designed for engineers and researchers in supporting their comprehension and further analysis of observed data on the complicated vibration characteristics of ground and buildings. Web-based interface makes it possible to use the applications in the network environment without any special additional software. The applications are also effective for e-learning on vibration theory and earthquake engineering.