the blast site, complete with simulated troops. Blast effects At 8:30 am Eastern Australian time, were detonated flattening a considerable area of the test site. Observers were located on a nearby hill away and above ground zero. Destruction was total within , severe within and stopped around . The effects of overpressure are summarized by the following table. For reference, 5.0 psi is enough to destroy city areas while instruments at the blast site recorded 83 psi at approximately . To understand the destructive forces, such an overpressure would correspond to wind speeds greater than , and would be equivalent to a 1.0 megaton blast at . This also helps in understanding how a test of 50 tons could be used to evaluate nuclear weapons which may be in the kiloton and megaton ranges by reducing the distance to ground zero for greater effect. See also Operation Sailor Hat Tunguska event, see images of blown down trees. Bush Tucker Man, Les J. Hiddens visits the site in one of his program's episodes. There is little to no evidence of the test but he discusses it briefly. References External links There were similar forest blast operations conducted in Canada codenamed:Distant Plain, events 1-5 Explosions in 1963 Blowdown Australia–United Kingdom relations Australia–United States relations 1963 in Australia Blowdown July 1963 events in Australia