Accession Number : ADA332280

Title :   A Wavelet Analysis of Mining Explosions: Observations Relating to Verification of a Comprehensive Nuclear Test Ban

Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA INST OF GEOPHYSICS AND PLANETARY PHYSICS

Personal Author(s) : Hedlin, Michael ; Wendel, Delrdre

PDF Url : ADA332280

Report Date : 17 NOV 1997

Pagination or Media Count : 34

Abstract : International nuclear testing threshold treaties, under effect in some form or another since 1983, have rallied scientists to devise ways of monitoring nuclear weapons tests. The UN General Assembly's adoption at a Comprehensive Test Ban Treaty in 1996 heightens the need to distinguish nuclear events not only from earthquakes, but also from man-made mining explosions. The treaty requires a monitoring threshold potentially as low as magnitude mg=2.5, which translates to a yield of roughly 16 T of explosive. The CTBT is even more stringent than the former International agreement, the Threshold Test Ban Treaty, which already imposed a ceiling of 150 kT. In the U.S., the number of man-made mining explosions with yield greeter than 50 T is about 10,000 per day, about one of which is greater than 200 T, giving ample justification for a discriminant that sifts earthquakes and nuclear explosions from mining explosions that may occur on the same magnitude scale. What is more, there are various ways to evade the detection of a nuclear test, such as detonating the bomb in an underground cavity or during an earthquake or certain types of mining explosions. That evasion tactics can effectively reduce the perceived magnitude by half underscores the need for high-gain. high-confidence identification methods. If testing is to be monitored globally and systematically, it is desirable to differentiate events independently of local testing or mining practices and local geological characteristics. Scientists therefore seek a seismic discriminant.

Descriptors :   *NUCLEAR EXPLOSION TESTING, *MINING ENGINEERING, *SEISMIC DISCRIMINATION, NUCLEAR EXPLOSIONS, YIELD(NUCLEAR EXPLOSIONS), MONITORING, UNDERGROUND EXPLOSIONS, ACOUSTIC ARRAYS, EARTHQUAKES, SEISMIC ARRAYS, WAVELET TRANSFORMS.

Subject Categories : Mining Engineering
      Seismic Detection and Detectors
      Nuclear Weapons

Distribution Statement : APPROVED FOR PUBLIC RELEASE