Arms Control Today May 1998

False Accusations, Undetected Test
And Implications for the CTB Treaty 
Gregory van der Vink, Jeffrey Park,
Richard Allen, Terry Wallace and Christel Hennet

Please note, orginial publication of this article was accompanied by 4 figures referenced in the text that will not be reproduced on the internet at this time. For a complete copy of the May 1998 issue, please contact or call 202.463.8270. Single issues/back issues cost $6 a piece.

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1. Bill Gertz. "Russia suspected of nuclear testing," The Washington Times, August 28, 1997, p. A1.

2. Richter-magnitude estimates can vary owing to geographic differences in the propogation efficiency of seismic waves. Magnitude 5.2 is a revised estimate from the U.S. Geological Survey (USGS), based on a large body of seismic data accumulated in the weeks following the explosion. The initial USGS estimate, based on less data and widely reported in the media, was 5.4. The prototype International Data Center estimated the Indian test to have magnitude 4.7. An estimate of 5.1 can be made based solely on data from the Nilore, Pakistan observatory. All estimates of nuclear yield in this article are based on the largest Richter magnitude that has not been revised, namely 5.2.

Gregory van der Vink is director of planning at the IRIS Consortium. Jeffrey park is associate professor of geology and geophysics at Yale University. Richard Allen is a doctoral candidate in the Department of Geosciences at Princeton University. Terry Wallace is professor of geosciences at the University of Arizona. Christel Hennet is a consultant at the IRIS Consortium. The views expressed in this article are those of the authors and do not necessarily represents the views of any institution with which the authors are associated. [Back]

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