The results of an experimental demonstration of electromagnetic detonation waves are presented. These waves are obtained by discharging a capacitor bank across the annulus of a magnetic annular shock tube filled with hydrogen‐oxygen mixtures. Wave speeds of more than twice the usual steady Chapman‐Jouguet detonation speeds are observed. Experiments with argon in place of the combustible mixture were also conducted to illustrate the basic difference between electromagnetic shock waves and electromagnetic detonations. Theoretically calculated results are included to provide a better understanding of the observed experimental results. It is suggested that techniques similar to those used in these experiments may be used to produce high‐speed detonations for gasdynamic laser applications or to stabilize combustion waves in a supersonic stream.