This optimistic assessment of the status and outlook for the use of seismic methods to monitor
underground nuclear explosions is timely, comprehensive, and competent. It is valuable for anyone
interested in monitoring of underground nuclear explosions, whether seismologist or not, and
gives background as well as current information necessary for adequate understanding of the
problem. It is not a scientific treatise, but a consensus with a collection of scientific opinions from
which the consensus was derived. In general it is clearly written--there is a certain amount of
confusion introduced because the seismological discussion is primarily carried out in terms of
magnitude, whereas the consensus statement only discusses yield. The study group responsible
for the report consisted of a group of seismologists from Canada, Czechoslovakia, France, India,
Japan, Romania, Sweden, the Union of Soviet Socialist Republics, the United Kingdom and the
United States of America (Constantinescu, Ericsson, Herrin, Karnik, Mechler, Miyamura,
Pasechnik, Press, Thirlaway, Whittam, Varghese). Dr. D. Davies, the Rapporteur, was responsible
for much of the work of compiling the report
