Ground and air vibrations induced by large surface blasts were monitored and the field results and a number of published results were used to assess the performance of existing predictors and for the development of improved prediction methods. Monitoring was performed with four seismographs giving complete wave records at limestone quarries, coal strip mines, and an open pit copper mine. Frequency content was analyzed and correlated with blast design. One new method to predict ground vibrations induced by blasting is an analytical predictor that accounts for inelastic attentuation and geometrical spreading, and calculates the peak velocity as a function of charge weight and distance. Statistical analysis of case studies confirms the consistent improvement over conventional scaled distance predictors. A new predictor is a computer program simulating blasts including blast geometry, charge distribution, and detonation sequence and simulating propagation of individual pulses to any point of interest where effects are summed.