F. A. McKeown J. H. Healy R. M. Hamilton 1969 The 1.1-megaton nuclear test Benham caused movement on previously mapped faults and was followed by a sequence of small earthquakes. These effects were confined to a zone extending not more than 13 kilometers from ground zero; they are apparently related to the release of natural tectonic strain. application/pdf 10.1126/science.166.3905.601 en American Association for the Advancement of Science Seismic activity and faulting associated with a large underground nuclear explosion article