Abstract
Atmospheric gravity waves excited by nuclear explosions were recorded on several occasions during the period 1967–68, on a large aperture (250 km × 200 km) array of long-period microbarographs (1–60 min period pass-band) in the New York-New jersey area. The spectrum of these waves peaks near a period of 15 min and their average group velocity (∼600 m sec−1), their dispersion and attenuation conform to theoretical predictions, for the surface mode.