The Seismological Society of America and the American Geophysical Union issued a joint position statement on the seismic verification of the Comprehensive Nuclear Test-Ban Treaty (CTBT). The statement was released at a press conference at AGU headquarters on 20 October 1999.

Terry Wallace, SSA president and geophysics professor at the University of Arizona, told reporters at the press conference that the statement was drafted over the last year and is a technical assessment of the capability of the monitoring system. Jeffrey Park, a geophysics professor at Yale University, commented on changes in seismological verification over the last forty years, especially...

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