[en] A total of 1,075 earthquakes occurred in the Pahute Mesa area during the period October 28, 1975, to June 28, 1976. The majority of these earthquakes are aftershocks of the nuclear events, Kasseri, Inlet, Muenster, Fontina, Cheshire, Estuary, Colby, and Pool. Smaller nuclear events on Rainier Mesa and Yucca Flat detonated in the same time period did not trigger aftershock sequences. The aftershock series were displaced laterally from ground zero and occurred deeper (at 4-6 km) than the nuclear event depth of burial (approximately 1 km). The aftershocks appear to occur on vertical faults with approximately north-south strike. The number of aftershocks following each nuclear event generally declined as the testing program progressed (for instance, Kasseri triggered twice as many events as Colby). Comparison of this series with the 1968-70 nuclear test series shows that Benham triggered about nine times the number of aftershocks associated with Kasseri. Aftershock b-values were lower during this series than the 1968-70 series