Anomalous surface waves from Lop Nor nuclear explosions: Observations and numerical modeling

Anomalous surface waves from Lop Nor nuclear explosions: Observations and numerical modeling

Surface waves from the Chinese test site of Lop Nor are analyzed using long-period and broadband stations located at regional and teleseismic distances and at different azimuths. For most azimuths, strong Love waves between 0.02 and 0.04S Hz are observed with an amplitude of up to 10 times that of the Rayleigh waves. In addition, an anomalous early Rayleigh wave train is observed at some statio...

Relative Location of Explosions Using Surface Waves

A method of relative location for explosions using Rayleigh waves is developed and tested. It involves cross correlating a wavetrain with a previously recorded signal from the same source region and &?.t&mining a relative "travel-time" from the peak in the -ross correlation trace. Locations are fairly accurate, but do not compare with the precision obtained with body waves and relative travel-t...

Sfort-pbriod Propagation Op Inprasonic Waves Prom Nuclear Explosions

Lop Nor Revisited: Underground Nuclear Explosion Locations, 1976–1996, from Double-Difference Analysis of Regional and Teleseismic Data

We have used seismic signals recorded at regional and teleseismic distances to determine precise locations of 19 underground nuclear explosions (13 in vertical shafts, and 6 in horizontal tunnels) carried out between October 1976 and July 1996 at the Lop Nor test site in the southern Xinjiang province of China. In addition to firstand later-arriving phase-pick data from the International Seismo...

Demonstration of Advanced Concepts for Nuclear Test Monitoring Applied to the Nuclear Test Site at Lop Nor, China

Starting in October 2001 the Center for Monitoring Research (CMR) engaged in an advanced concept demonstration (ACD) to improve nuclear-explosion monitoring capability, focused on the Chinese test site at Lop Nor. A demonstration prototype system was developed by integrating innovative techniques gleaned from recent research and development advances. Emphasis was in the areas of detection, loca...